Re: Pentax - New Directions (now getting longer)

2002-07-11 Thread Pål Jensen

Chris wrote:

 Uh... not exactly.  Photographers can never learn how multipattern
 metering systems work.  

Weird. I know how my Pentax multipattern metering works. 

The algorithms are extremely complex; some Nikons,
 for example, have a database of tens of thousands of sample scenes that
 the camera will consider when choosing an exposure.  

This is a long lived myth. The camera manufacturers may well use thousands of images 
to find an agorithm for the matrix metering but the camera does not scan through 
thousands of images when it meters.


The photographer has
 no idea whatsoever which of these scenes the camera will select.  Matrix
 metering does a good job with print film for the most part, but the point
 is that the photographer, no matter how much they use it, will never be
 able to know for sure how much importance the meter is attaching to each
 individual segment in any given (and changing) lighting situation.  At
 least with CW metering you know exactly how much weight the camera gives
 to the segments.


This is a misunderstanding. The matrix metering will give you closer reading to the 
correct (here meant as 18% reflectance) than centerweighted metering. The difference 
in the real world is that matrix metering will compensate to some extent for backlit 
subjects. That's about the extent of it. Otherwise matrix metering will be equally 
fooled by scenes dominated by tones far off from medium; eg. like snow. 
I've checked matrix metering agains spot metering for several  years now. Not once has 
the matrix meter suggested a weird or unpredictable exposure.

Pål


 
 I'm sure that, given enough time and experimentation, a photographer can
 learn how their camera weights the segments in some very common lighting
 conditions, but this is almost impossible to assess because of the sheer
 number of segments and variety of lighting conditions.  And it's only good
 until you switch cameras (most of the MZ series, for example, use
 different algorithms to decode the same six segments).
 
 chris
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RE: Pentax - New Directions (now getting longer)

2002-07-10 Thread Alan Chan

Can you explain in more detail?
If I take a picture of a Kodak grey card in bright sunshine (say) and then
compare the slide
how do I know that I am not being fooled by the 'characteristics' of the
film rather then exposure?
I am sorry if this is obvious to  you but it is not to me.
I used to work on optical analytical equipment and perhaps I am thinking in
to exact terms.
With my cameras I just get to know the 'personality' of each
and beat it around the head a bit until it does what I want ;-)
I would like to be able to explain the procedure of 'calibrating' to my 
wife
who is just getting into macro photography (MZ7 and either velvia or Kodak
100 extra colour).
Do you know of any links to articles about this?

My approach was rather simple. I have a Minolta IV F handheld meter which is 
accurate up to 1/10EV (confirmed by the Minolta service centre).

1) Place the Kodak card (the larger, the better) on a table.

2) Light the card evenly, and the light source must be stable. (sunlight is 
not a good choice because it varies every second even it appears perfectly 
identical to human eyes).

3) Place the light meter on different position of the grey card and take 
some incident readings. If all reading are identical, the grey card will be 
evenly lighted.

4) Point the camera to the centre of the grey card to take some readings and 
see if they match the incident readings from the handheld meter. This should 
work for centre-weighted, spot  multi-segment meterings (since the grey 
card was evenly lighted, the multi-segment metering should not do any 
auto-adjustment itself, and would behave just like centre-weighted 
metering).

PS: If your camera allowed you to set the aperture through the camera or the 
aperture ring, don't be surprised if the chosen shutter speed differs a bit. 
This is due to the rather loose manufacturing tolerance.

regards,
Alan Chan

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Re: Pentax - New Directions (now getting longer)

2002-07-10 Thread Jan van Wijk

On Tue, 9 Jul 2002 22:56:37 EDT, [EMAIL PROTECTED] wrote:


 Coming from manual focus background, I cannot think of any improvement over 
 the MZ-3/5n, except a better viewfinder.
 

I think the build quality on the -5n could be a little better. Feature-wise, 
it's close to ideal.

Agreed.

One other thing that could be better is tracking moving objects with the autofocus,
I noticed the Z1 does a much better job at that than the MZ3 does ...

Regards, JvW

--
Jan van Wijk;   http://www.dfsee.com/gallery
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Re[2]: Pentax - New Directions (now getting longer)

2002-07-10 Thread Bob Walkden

Hi,

 PS: If your camera allowed you to set the aperture through the camera or the
 aperture ring, don't be surprised if the chosen shutter speed differs a bit. 
 This is due to the rather loose manufacturing tolerance.

aren't you assuming the very point that's at question here? In other
words, if your camera meter disagrees with the external meter, you're
assuming that the camera meter is accurate and that the aperture or
shutter are inaccurate. But the purpose of the exercise is to
determine the accuracy of your meter, so you've made a circular
argument and undermined everything else you wrote.

---

 Bob  

mailto:[EMAIL PROTECTED]

Wednesday, July 10, 2002, 8:27:19 AM, you wrote:

Can you explain in more detail?
If I take a picture of a Kodak grey card in bright sunshine (say) and then
compare the slide
how do I know that I am not being fooled by the 'characteristics' of the
film rather then exposure?
I am sorry if this is obvious to  you but it is not to me.
I used to work on optical analytical equipment and perhaps I am thinking in
to exact terms.
With my cameras I just get to know the 'personality' of each
and beat it around the head a bit until it does what I want ;-)
I would like to be able to explain the procedure of 'calibrating' to my 
wife
who is just getting into macro photography (MZ7 and either velvia or Kodak
100 extra colour).
Do you know of any links to articles about this?

 My approach was rather simple. I have a Minolta IV F handheld meter which is 
 accurate up to 1/10EV (confirmed by the Minolta service centre).

 1) Place the Kodak card (the larger, the better) on a table.

 2) Light the card evenly, and the light source must be stable. (sunlight is 
 not a good choice because it varies every second even it appears perfectly 
 identical to human eyes).

 3) Place the light meter on different position of the grey card and take 
 some incident readings. If all reading are identical, the grey card will be 
 evenly lighted.

 4) Point the camera to the centre of the grey card to take some readings and 
 see if they match the incident readings from the handheld meter. This should 
 work for centre-weighted, spot  multi-segment meterings (since the grey 
 card was evenly lighted, the multi-segment metering should not do any 
 auto-adjustment itself, and would behave just like centre-weighted 
 metering).

 PS: If your camera allowed you to set the aperture through the camera or the 
 aperture ring, don't be surprised if the chosen shutter speed differs a bit. 
 This is due to the rather loose manufacturing tolerance.

 regards,
 Alan Chan
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Re: Re[2]: Pentax - New Directions (now getting longer)

2002-07-10 Thread Alan Chan

aren't you assuming the very point that's at question here? In other
words, if your camera meter disagrees with the external meter, you're
assuming that the camera meter is accurate and that the aperture or
shutter are inaccurate. But the purpose of the exercise is to
determine the accuracy of your meter, so you've made a circular
argument and undermined everything else you wrote.

I don't know if it was my poor English (not my 1st language). This was not 
what I intended to say. I have never said (or did I?) the camera metering 
was accurate even if it was different from the incident readings. What I was 
trying to say is that don't be surprised if the chosen shutter speed was 
different between 'A' and non-'A' setting on the lens. This is due to the 
mechanical aperture coupling tolerance difference (different lens/camera 
combinations have different results). It has nothing to do with the accuracy 
of the actual aperture or actual shutter speed, but the chosen shutter 
speed by the camera. And for the purpose of the test (to determine the 
accuracy of the metering, not the accuracy of the mechanical coupling), the 
lens is best to set to 'A'. This way, all communications are done 
electronically and there will be no chance for error (due to mechanical 
tolerance). The most important thing here is, we are not trying to determine 
the accuracy of the actual aperture of any lens (because every lens is 
different), or the accuracy of the mechanical aperture coupling (variable 
resistor), but the metering alone.

regards,
Alan Chan


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Re: Pentax - New Directions (now getting longer)

2002-07-10 Thread Rubenstein, Bruce M (Bruce)

This is not true. Nikons do not have databases of thousands of scenes stored in the 
cameras. (Think about the technical problems in storing this much data and instantly 
searching and accessing it back in 1983; when the FA came out.) What Nikon did was 
analyze tens of thousands of images to derive exposure rules based on metered 
differences between segments. 
My experience is that multi segment/matrix metering works very well for the vast 
majority of scenes. The trick is to find out where it won't work, and the only way to 
do that is to shoot many pictures in that metering mode. When I don't think matrix 
will work right I use spot metering. With bodies that have matrix and spot I never use 
CW.
FWIW: I've found Pentax (ZX-5) and Nikon (F100  N80) metering to equally good.

From: Chris Brogden [EMAIL PROTECTED]
 
The algorithms are extremely complex; some Nikons,
for example, have a database of tens of thousands of sample scenes that
the camera will consider when choosing an exposure. 
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RE: Pentax - New Directions (now getting longer)

2002-07-09 Thread Alan Abbott

I know that this has been gone through before butI am confused,
so could someone please explain HOW to 'calibrate'.
Also are you 'calibrating' the camera/film combo 
or can you 'calibrate'the camera seperate from the film?
Alan 

Herb said,

 all of the advanced books on photography i have read lately 
 start their
 hardware section on calibrating the light meters in your 
 camera body for
 exposure accuracy and marking the difference on the body itself. each
 individual body is different within a single model and 
 possibly batch. if
 Velvia 50 needs to be rated at 64 to get proper exposures, 
 then that is
 what you do, not complain about lousy exposure meters as Joe is doing.
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RE: Pentax - New Directions (now getting longer)

2002-07-09 Thread Alan Chan

I know that this has been gone through before butI am confused,
so could someone please explain HOW to 'calibrate'.
Also are you 'calibrating' the camera/film combo
or can you 'calibrate'the camera seperate from the film?

The easiest way is to alter the ISO setting to your favour, although I have 
never done that. AFAIK, the metering is accurate if the reading from the 
Kodak grey card is correct. However, 1/3-1/2 EV difference is quite common 
among new and used cameras.

regards,
Alan Chan


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RE: Pentax - New Directions (now getting longer)

2002-07-09 Thread Alan Abbott

Hi Alan,
Can you explain in more detail?
If I take a picture of a Kodak grey card in bright sunshine (say) and then
compare the slide
how do I know that I am not being fooled by the 'characteristics' of the
film rather then exposure?
I am sorry if this is obvious to  you but it is not to me.
I used to work on optical analytical equipment and perhaps I am thinking in
to exact terms.
With my cameras I just get to know the 'personality' of each 
and beat it around the head a bit until it does what I want ;-)
I would like to be able to explain the procedure of 'calibrating' to my wife
who is just getting into macro photography (MZ7 and either velvia or Kodak
100 extra colour).
Do you know of any links to articles about this?
Thanks
   Alan (almost like the Monty Python sketch g'day Bruce, Hello
Bruce.!)

 -Original Message-
 From: Alan Chan [mailto:[EMAIL PROTECTED]]
 Sent: Tuesday, July 09, 2002 10:57 AM
 To: [EMAIL PROTECTED]
 Subject: RE: Pentax - New Directions (now getting longer)
 
 
 I know that this has been gone through before butI am confused,
 so could someone please explain HOW to 'calibrate'.
 Also are you 'calibrating' the camera/film combo
 or can you 'calibrate'the camera seperate from the film?
 
 The easiest way is to alter the ISO setting to your favour, 
 although I have 
 never done that. AFAIK, the metering is accurate if the 
 reading from the 
 Kodak grey card is correct. However, 1/3-1/2 EV difference is 
 quite common 
 among new and used cameras.
 
 regards,
 Alan Chan
 
 
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Bob Rapp

- Original Message -
From: Alan Abbott [EMAIL PROTECTED]

 I know that this has been gone through before butI am confused,
 so could someone please explain HOW to 'calibrate'.
 Also are you 'calibrating' the camera/film combo
 or can you 'calibrate'the camera seperate from the film?
 Alan


Unfortunately, every scene is not equivalent to a grey card and the
evaluative systems try to interpret what it thinks your are seeing. Some,
like the new L have an auto-program mode that adjusts to what it thinks
the scene is. Works great with color negative film with a -1 +3 latitude.

Calibration starts with you and your appraisal of the final image. You make
the adjustments required to enable the camera and lens to deliver what you
expect. That is the start.

The first SLR I had was one that I bought in the 60s, a Spotmatic. The sales
person gave me a roll of Kodachrome and a mailer and told me to shoot the
roll and take notes on how I came about the exposure setting. Then, he said,
evaluate your slides and make the necessary adjustments in my metering
methods. It worked then and it still works now.

Shooting slide film and BW are remarkably similar. The benefit of fine
tuning your habits at all the levels of your involvement will, in the end,
deliver the satisfaction you want. It takes practice.

To expect your camera, or any camera, to deliver the goods, without your
envolvement, will lead you down a long lonely path.

My honest opinion, but your mileage may vary.

Bob
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RE: Pentax - New Directions (now getting longer)

2002-07-09 Thread Alan Abbott

Agreed.
Let me try to clarify what I am after.
If I buy a camera and assume that I know the 'characteristics of a film
(slide).
Is there any quantative way of testing the camera so that I know if it over
or under exposes?
How do I know that a picture taken that for example appears over exposed is
because the camera interpreted it incorrectly for my tastes.
How do I minimise the effects of all the other things in the equation
(colour temp, development etc).
If I still worked in a lab I could put it on a jig and use known light
sources etc (sad aren't I ;-).
I know that a lot of this is subjective.
Its more a case of finding out for example:
camera A has a tendency to overexpose under these conditions and film B is
not good at handling under exposure.
How do you split out the characteristics of each part?
What about the lens?
Or is it a case of saying this combination (camera,lens,film) has a tendency
to do this.
Does this make any sense?
Best regards
 Alan
 
 Calibration starts with you and your appraisal of the final 
 image. You make
 the adjustments required to enable the camera and lens to 
 deliver what you
 expect. That is the start.
 To expect your camera, or any camera, to deliver the goods, 
 without your
 envolvement, will lead you down a long lonely path.
 
 My honest opinion, but your mileage may vary.
 
 Bob
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RE: Pentax - New Directions (now getting longer)

2002-07-09 Thread Herb Chong

Message text written by INTERNET:[EMAIL PROTECTED]
I know that this has been gone through before butI am confused,
so could someone please explain HOW to 'calibrate'.
Also are you 'calibrating' the camera/film combo 
or can you 'calibrate'the camera seperate from the film?
Alan

shot a roll of film of a scene starting from probably at least 2 stops over
to 2 stops under. use your ISO dial for manual ISO setting so that you get
1/3 stop increments above and below the nominal for the film. do the
original metering with a 18% gray card and use your camera in manual
exposure mode set to correct exposure for the gray card. in the scene,
include brights and darks well beyond what only 2 stops of compensation can
cover. if you have the means, include in the scene a standardized color
target. i own and use a GretagMacbeth ColorChecker for this purpose and to
check color shifts and reciprocity failure. include in the scene also a
small piece of paper with film and ISO rating you used for each shot. the
best photo tells you the ISO speed you should use for that film in that
camera body when exposure has been set. best is a combination of what you
like and how closely the color reference looks like the original color
target.

i happen to like Provia 100F about 1/3 to 1/2 stop underexposed, just like
i do for most other slide films. the ones shot dead on according to the
exposure meter are a bit light for my tastes. it measures more accurately
on the densitometer and colorimeter though. however, i don't complain about
lousy metering. when something matters, i bracket and i always include half
stop under in the bracketing. i have no problem with staying with
evaluative metering most of the time and when i think it will be fooled, i
bracket up to 2 stops in each direction in half stop increments, leaving it
in evaluative mode.

expecting to take only shot of every scene and getting a perfect shot is
almost impossible, so i bracket. i use my exposure compensation dial
instead of manually setting ISO because i find it more convenient. i
habitually choose slight underexposure for slide film because i like it. i
don't complani about the meter.

Herb
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Joseph Tainter

 On Mon, 8 Jul 2002, Joseph Tainter wrote:
  The ZX-L is supposed to be a 5n replacement.
 
 No, this is not true.  ZX-L is a replacement for ZX-7.
 The proof is at Pentax Japan web site: MZ-7 has been discontinued and no
 longer listed; whereas MZ-3 and MZ-5n are still in production.
 
Ah...well, this is potentially good news. Pentax may yet bring forth a
capable medium-priced body to replace the 5n. I hope it will have a
center-weighted option that is as easily accessible as it is now on the
1p, 5n, and MZ-S.

Thanks, Lawrence.

Joe
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Pat White

If you think Petersen's Photographic and Shutterbug are great authorities, that may be 
part of your problem.  Did anyone see the MZ-S test in the May 2002 Shutterbug?  It 
seemed as if the tester hadn't used an auto-exposure camera before.  He says Tv stands 
for time priority (his quotes), and writes that the green button is for quickly 
switching from programmed control to photographer control of the automatic exposure, 
rather than the other way around.  He goes on to describe setting the aperture by 
changing the shutter speed, saying you could call it aperture priority if you want to 
think of it as that.  Funny, I thought that was shutter priority.

He caps it by writing A manually set aperture priority is also available., and 
describes setting the aperture with the aperture ring on the lens.  His understanding 
of the metering modes was pretty unusual, to put it politely.  He also praises the 
all-mode DOF, saying This is an improvement over the PZ1-P and ZX-5n, which allow a 
stop-down preview only in the aperture priority and manual modes.  Don't they both 
allow DOF preview in all modes?

Finally, why would you buy two expensive cameras and not spend the time and expense to 
shoot a roll of film and see what results the main metering system gives, rather than 
assuming it's worthless, based on some review.  I carry an incident meter, and almost 
every single time, it agrees very closely with the MZ-S's evaluative reading.  That's 
my experience, anyway.

Pat White
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Pål Jensen

William wrote:

 I have heard of problems with just about everyone's evaluative
 metering systems having some flaws with slide film. They all
 seem to overexpose somewhat in many situations.
 The trick would be to set the meter to center weighted, if the
 camera supports such a regressive feature.


This is plain wrong. Evaluative meter is like any other meter; it tries to make 
everything medium toned. However, the notion that center weighed metering solve the 
problem or has a better hit rate is plain wrong. 
The fact that some people prefer center weighted metering because they know how it 
react to various scenes is fine. However, this has nothing to do with matrix metering 
failure but the photographer not having learned how matrix metering works.

Pål 
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Pål Jensen

Joseph wrote:

 Right. I made it all up. So have the other Pentax users who've posted on
 this matter from time to time. In fact I think that the reviewers for
 Shutterbug and Petersen's made it up too. Got you going, didn't we?

It is true that all entry level slr's have matrix metering systems that are fine tuned 
to print film. This may lead to slight over exposure for certain scenes. However, what 
you are making up is that center weighted metering fares any better. Those scenes that 
will be overexposed with matrix metering will be underexposed with center weighted 
metering. You have to compensate in both cases.

Pål
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread ERNReed

In a message dated 7/9/2002 3:37:47 PM Central Daylight Time, [EMAIL PROTECTED] 
writes:


 He also praises the all-mode DOF, saying This is an improvement over the 
 PZ1-P and ZX-5n, which allow a stop-down preview only in the aperture 
 priority and manual modes.  Don't they both allow DOF preview in all 
 modes?
 

You're half right. The PZ-1(p) only allow stop-down preview when the aperture 
is set with the aperture ring, but the ZX-5n will do it in all modes.

ERNR
My photographs hang on the virtual walls at http://members.aol.com/ernreed
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Alan Chan

Ah...well, this is potentially good news. Pentax may yet bring forth a
capable medium-priced body to replace the 5n. I hope it will have a
center-weighted option that is as easily accessible as it is now on the
1p, 5n, and MZ-S.

Coming from manual focus background, I cannot think of any improvement over 
the MZ-3/5n, except a better viewfinder.

regards,
Alan Chan


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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Pål Jensen

Pat wrote:
He also praises the all-mode DOF, saying This is an improvement over the PZ1-P and 
ZX-5n, which allow a stop-down preview only in the aperture priority and manual 
modes.  Don't they both allow DOF preview in all modes?

Actually, no. 


 I carry an incident meter, and almost every single time, it agrees very closely with 
the MZ-S's evaluative reading.  That's my experience, anyway.


This is also my experience. 


Pål
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread CBWaters

A better winder motor would be nice.  I'm worried that mine sounds like it's
trying very hard to advance the film...
Cory Waters

- Original Message -
From: Alan Chan [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, July 09, 2002 6:08 PM
Subject: Re: Pentax - New Directions (now getting longer)


 Ah...well, this is potentially good news. Pentax may yet bring forth a
 capable medium-priced body to replace the 5n. I hope it will have a
 center-weighted option that is as easily accessible as it is now on the
 1p, 5n, and MZ-S.

 Coming from manual focus background, I cannot think of any improvement
over
 the MZ-3/5n, except a better viewfinder.

 regards,
 Alan Chan


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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread William Robb

- Original Message -
From: Pål Jensen
Subject: Re: Pentax - New Directions (now getting longer)


 William wrote:

  I have heard of problems with just about everyone's
evaluative
  metering systems having some flaws with slide film. They all
  seem to overexpose somewhat in many situations.
  The trick would be to set the meter to center weighted, if
the
  camera supports such a regressive feature.


 This is plain wrong. .

whatever.
William Robb
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Re: Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread senelson

 Coming from manual focus background, I cannot think of any improvement over 
 the MZ-3/5n, except a better viewfinder.
 

The lack of 1/2 stop shutter speeds in full manual mode (no numbers, just click stops 
1/2 way in between).  Some may also complain about the 2s maximum manual shutter 
speed, but anything longer than 2s is easy enough to time with a stop watch.  OK, 4 
seconds would be better.

-Scott
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Chris Brogden

On Mon, 8 Jul 2002, William Robb wrote:

 Nikon and Minolta specifically. Not sure about Canon.
 Who else has multi pattern metering?

Canon has had some problems with their metering lately, notably the severe
underexposure that the early Elan II's, EOS 3's, and Elan 7's (?) were
doing.  I believe they've 'fixed' most of those problems by now.

chris
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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Alan Chan

I think the build quality on the -5n could be a little better. 
Feature-wise,
it's close to ideal.

But then if the built quality were better, wouldn't it be a higher class 
model then? I think Pentax should drop the 5n and made the 3 as affordable 
as the 5n, things would have been more perfect. Their specs. are really 
too close to exist at the same time imo, except their artifical price 
tags.

regards,
Alan Chan


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Re: Pentax - New Directions (now getting longer)

2002-07-09 Thread Ayash Kanto Mukherjee

On Tue, 9 Jul 2002 [EMAIL PROTECTED] wrote:

 In a message dated 7/9/2002 3:37:47 PM Central Daylight Time, [EMAIL PROTECTED] 
 writes:
 
 
  He also praises the all-mode DOF, saying This is an improvement over the 
  PZ1-P and ZX-5n, which allow a stop-down preview only in the aperture 
  priority and manual modes.  Don't they both allow DOF preview in all 
  modes?
  
 
 You're half right. The PZ-1(p) only allow stop-down preview when the aperture 
 is set with the aperture ring, but the ZX-5n will do it in all modes.
 
 ERNR

Yes, this is because the DOF of PZ-1P works mechanically whereas it is 
electronic in the case of ZX-5N.

Ayash.
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread Bob Rapp

An advantage of the low cost MZ-L, you can override the film speed setting.
Lots of features in an economy body.

Bob
- Original Message -
From: [EMAIL PROTECTED]
Now, if you couldn't change the film speed setting on the cameras,
 that would be a problem, and I am against all cameras which don't allow
 user-setting of film speeds. But on most if not all of the current Pentax
 models, you can change it.

 ERNR
 My photographs hang on the virtual walls at http://members.aol.com/ernreed
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread Herb Chong

Message text written by INTERNET:[EMAIL PROTECTED]
In light of the allegations that some folks have had trouble with slide
film 
being overexposed, I still wouldn't have a problem recommending Pentax to 
someone who wants to shoot slides; but I would simply recommend that they
try 
the body they're using and see whether they'd need/want to change the ISO 
rating for slide film to get the results that would suit them. And that 
applies to any brand of camera.

all of the advanced books on photography i have read lately start their
hardware section on calibrating the light meters in your camera body for
exposure accuracy and marking the difference on the body itself. each
individual body is different within a single model and possibly batch. if
Velvia 50 needs to be rated at 64 to get proper exposures, then that is
what you do, not complain about lousy exposure meters as Joe is doing.

Herb...
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread Pål Jensen

Joseph wrote:
 Part of the issue may be where one shoots. Nearly all of my shooting is
 in bright sun, with a lot of contrast. Pentax's multi-segment metering
 in these situations will apparently expose for dark areas, causing
 lighter areas to overexpose on slide film. On color negative film this
 is okay, so I suppose Pentax designs their metering program for such
 films (which most users shoot anyway). If you shoot in conditions that
 don't have a lot of contrast, you may not experience a problem.


This is basically just a problem with the latitude of the film. Slide film cannot 
record high contreast scenes. For slide film you should usually expose for the 
highlights but the camera doesn't know that and tries to average the scene (like all 
meters - including center weighted). In some circumstances you have to overide any 
meter. 


 
 There was a post here sometime ago from an owner of the MZ-S who said
 that it does not seem to overexpose. I bought two MZ-S's for my office,
 but won't trust the multi-segment metering for anything crucial. I took
 them to Africa recently, but used center-weighted and got fine
 exposures.
 
 I'm very frustrated that for those of us who shoot slide film, Pentax
 offers only one model, quite expensive. I'm fine with my two PZ-1p
 bodies, but have a problem recommending Pentax to anyone who wants to
 shoot slides but doesn't wish to spend $900 for an MZ-S.


This is with all due respect nonsense. Pentax have one of the best matrix metering 
systems in the industry; just look at what Andy Rouse says about his switch from the 
Canon EOS-1v to Pentax - no need to constantly override the matrix meter anymore. He 
fully rely on Pentax AF and matrix metering.
The matrix metering of my 645n and MZ-S (and for that matter the Z-1p) is several 
magnitudes more right than center weighted metering. No meter is correct all the 
time but it is really boring to almost always figuring out that the matrix meter is 
right 95% or more of the time with Velvia. I always (when time allows) check the 
matrix reading with a spotmetering. Practically always, the matrix meter is within 1/3 
of a stop; a difference that qualifies as taste in exposure.

Pål
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Re: Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread Joseph Tainter

 Have you tried shooting with a 5n in bright light or are you just going
on the common report that the lcd is hard to read in bright light.

Scott, I tried a 5n at a dealer here in Albuquerque. I stepped outside
with the camera and could not read the exposure information in the
viewfinder except by contortions that would really require three hands
for every shot. I've noticed the problem also on the ZX-50 and the
PZ-1p. The MZ-S may be a bit more readable, but I haven't used it since
January so don't recall precisely. Part of the problem may be that I
wear glasses. But others have complained of this problem too.

If the 5n works for you, that's great. I assume it's being discontinued,
though.

Joe
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread Joseph Tainter

 In light of the allegations that some folks have had trouble with slide
film
 being overexposed, I still wouldn't have a problem recommending Pentax to
 someone who wants to shoot slides; but I would simply recommend that they try the 
body they're using and see whether they'd need/want to change the ISO
 rating for slide film to get the results that would suit them.

Right. Most of us on this list could work around the problem. But I just
gave my old ZX-50 to my wife, who is not going to understand when I tell
her to adjust the ISO or the EV or use the exposure compensation button
(then remember to reset it afterwards). She just wants to point and
shoot, and occasionally needs slides. I know of others I work with who
are in the same situation. They need to shoot slides but don't want (or
need) to learn as much about photography as we know. I'd like to
recommend Pentax to them but am reluctant to, only because of this
problem.

Joe
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread Joseph Tainter

 This is with all due respect nonsense. Pentax have one of the best matrix metering 
systems in the industry

Right. I made it all up. So have the other Pentax users who've posted on
this matter from time to time. In fact I think that the reviewers for
Shutterbug and Petersen's made it up too. Got you going, didn't we?

Joe
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread William Robb

- Original Message -
From: Joseph Tainter
Subject: Re: Pentax - New Directions (now getting longer)




 Right. Most of us on this list could work around the problem.
But I just
 gave my old ZX-50 to my wife, who is not going to understand
when I tell
 her to adjust the ISO or the EV or use the exposure
compensation button
 (then remember to reset it afterwards).

You don't let her drive, I hope?
William Robb
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread William Robb

- Original Message -
From: Joseph Tainter
Subject: Re: Pentax - New Directions (now getting longer)


  This is with all due respect nonsense. Pentax have one of
the best matrix metering systems in the industry

 Right. I made it all up. So have the other Pentax users who've
posted on
 this matter from time to time. In fact I think that the
reviewers for
 Shutterbug and Petersen's made it up too. Got you going,
didn't we?

I have heard of problems with just about everyone's evaluative
metering systems having some flaws with slide film. They all
seem to overexpose somewhat in many situations.
The trick would be to set the meter to center weighted, if the
camera supports such a regressive feature.
William Robb
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread ERNReed

In a message dated 7/8/2002 8:07:58 PM Central Daylight Time, 
[EMAIL PROTECTED] writes:


 I have heard of problems with just about everyone's evaluative
 metering systems having some flaws with slide film. They all
 seem to overexpose somewhat in many situations.
 

Clarification, Mr Robb -- by everyone do you mean all brands or all 
Pentax users?

ERNR
My photographs hang on the virtual walls at http://members.aol.com/ernreed
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread William Robb

- Original Message -
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, July 08, 2002 7:49 PM
Subject: Re: Pentax - New Directions (now getting longer)


 In a message dated 7/8/2002 8:07:58 PM Central Daylight Time,
 [EMAIL PROTECTED] writes:


  I have heard of problems with just about everyone's
evaluative
  metering systems having some flaws with slide film. They all
  seem to overexpose somewhat in many situations.
 

 Clarification, Mr Robb -- by everyone do you mean all
brands or all
 Pentax users?

Nikon and Minolta specifically. Not sure about Canon.
Who else has multi pattern metering?
William Robb
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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread Alan Chan

Right. Most of us on this list could work around the problem. But I just
gave my old ZX-50 to my wife, who is not going to understand when I tell
her to adjust the ISO or the EV or use the exposure compensation button
(then remember to reset it afterwards). She just wants to point and
shoot, and occasionally needs slides. I know of others I work with who
are in the same situation. They need to shoot slides but don't want (or
need) to learn as much about photography as we know. I'd like to
recommend Pentax to them but am reluctant to, only because of this
problem.

I could be old fashion but isn't it too much to ask for perfect exposed 
slides without learning about exposure at all?

regards,
Alan Chan


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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread Alan Chan

Right. I made it all up. So have the other Pentax users who've posted on
this matter from time to time. In fact I think that the reviewers for
Shutterbug and Petersen's made it up too. Got you going, didn't we?

My impression got from Japanese magazines is that Nikon and Minolta had the 
best multi-segment metering, and Nikon had the best flash metering, while 
Canon the worst on both. Pentax is somewhere in between. Now, this is not 
official or scientific so don't flame me please.

regards,
Alan Chan


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Re: Pentax - New Directions (now getting longer)

2002-07-08 Thread Alan Chan

Nikon and Minolta specifically. Not sure about Canon.
Who else has multi pattern metering?

Rollei?

regards,
Alan Chan


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RE: Pentax - New Directions (now getting longer)

2002-07-08 Thread tom

 -Original Message-
 From: [EMAIL PROTECTED]
 [mailto:[EMAIL PROTECTED]]On Behalf Of Alan Chan


 Right. I made it all up. So have the other Pentax users
 who've posted on
 this matter from time to time. In fact I think that the
 reviewers for
 Shutterbug and Petersen's made it up too. Got you going, didn't we?

 My impression got from Japanese magazines is that Nikon and
 Minolta had the
 best multi-segment metering, and Nikon had the best flash
 metering, while
 Canon the worst on both. Pentax is somewhere in between.
 Now, this is not
 official or scientific so don't flame me please.

I don't have anything official either, but the MZ-S matrix metering is
a major improvement over the ZX-5n and PZ-1p. I don't shoot slides,
but print a lot of b+w proofs, and the MZ-S has saved me hours, maybe
days, in the darkroom.

tv
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