Re: K10 Debug Mode

2007-03-19 Thread John Whittingham
On Sun, 18 Mar 2007 17:25:34 -0600, William Robb wrote
 - Original Message - 
 From: John Celio
 Subject: Re: K10 Debug Mode
 
 I tested my K10D's focusing accuracy a couple nights ago.  I figured it was
  fine, but I did it just for the hallibut.
 
  Fishy puns aside, I used my D-FA 100mm f2.8 macro (shot wide open) and it
  looks like my camera is spot-on.  Are there really any benefits to 
  checking
  focus with other lenses if one lens with very shallow DOF shows accurate
  results?  If there are, I'm very curious as to why that is.
 
 Check with short lenses, they have less depth of focus (which is 
 different from depth of field).
 
 William Robb

In theory it would make sense to test the K10D with a lens in the 28mm-35mm 
range then as indeed you did using the 31mm Ltd rather than going to either 
extreme. I'm thinking FA 35/2 at the widest aperture and then try FA 28/2.8 
with maybe a test using 18mm and 135mm to see what difference is apparent.

John



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Re: K10 Debug Mode

2007-03-18 Thread John Whittingham
On Sat, 17 Mar 2007 17:32:06 -0600, William Robb wrote
 So, on Lawrences recommendation, I went and fiddled with the AF 
 offset, and decided that at distance, the camera now had some front 
 focus issues. A few tweaks later, and now I have neutral focus at 
 distance, but the camera will now have some back focus, though not 
 as much as when I started, at close focus. 

 William Robb

Sounds like a right can of worms, I think I'll test and see just how far out 
it is. I find some lenses are better than others and flouresent lighting 
doesn't seem to help.

John



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Re: K10 Debug Mode

2007-03-18 Thread David J Brooks
I'v been reading these AF tweaking posts closly, and have to agree with Godfrey.

I'm not going to do anything to my K10D. It seem crisp enough with the
16-45(better that with the istD)and 50-200.

Besides i can screw up a light bulb replacement, so it was a givin.:-)

Dave

On 3/17/07, Godfrey DiGiorgi [EMAIL PROTECTED] wrote:
 After seeing all the hubbub with this stuff on DPReview.com, I
 decided to leave my camera alone and do the fw 1.11 update. The AF is
 close enough and produces excellent results. If I really need
 critical focusing, I focus manually and use a focusing magnifier. It
 only makes sense if I'm using a tripod anyway.

 G

 On Mar 17, 2007, at 4:32 PM, William Robb wrote:

  So, on Lawrences recommendation, I went and fiddled with the AF
  offset, and
  decided that at distance, the camera now had some front focus
  issues. A few
  tweaks later, and now I have neutral focus at distance, but the
  camera will
  now have some back focus, though not as much as when I started, at
  close
  focus.
  I also have been reminded just how very good the FA31mm is at f/8.
  It is one
  kick ass lens.
 
  William Robb
 
 
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Re: K10 Debug Mode

2007-03-18 Thread William Robb

- Original Message - 
From: David J Brooks
Subject: Re: K10 Debug Mode


 I'v been reading these AF tweaking posts closly, and have to agree with 
 Godfrey.

 I'm not going to do anything to my K10D. It seem crisp enough with the
 16-45(better that with the istD)and 50-200.

 Besides i can screw up a light bulb replacement, so it was a givin.:-)



Normally, I'm not this geeky either, but I had a little extra time on my 
hands.
You know what they say about idle hands.

William Robb


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Re: K10 Debug Mode

2007-03-18 Thread P. J. Alling
You stop that right now young man or you'll go blind.

William Robb wrote:
 - Original Message - 
 From: David J Brooks
 Subject: Re: K10 Debug Mode


   
 I'v been reading these AF tweaking posts closly, and have to agree with 
 Godfrey.

 I'm not going to do anything to my K10D. It seem crisp enough with the
 16-45(better that with the istD)and 50-200.

 Besides i can screw up a light bulb replacement, so it was a givin.:-)


 

 Normally, I'm not this geeky either, but I had a little extra time on my 
 hands.
 You know what they say about idle hands.

 William Robb


   


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Re: K10 Debug Mode

2007-03-18 Thread John Celio
I tested my K10D's focusing accuracy a couple nights ago.  I figured it was 
fine, but I did it just for the hallibut.

Fishy puns aside, I used my D-FA 100mm f2.8 macro (shot wide open) and it 
looks like my camera is spot-on.  Are there really any benefits to checking 
focus with other lenses if one lens with very shallow DOF shows accurate 
results?  If there are, I'm very curious as to why that is.

Thanks,
John

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Re: K10 Debug Mode

2007-03-18 Thread David J Brooks
On 3/18/07, John Celio [EMAIL PROTECTED] wrote:
 I tested my K10D's focusing accuracy a couple nights ago.  I figured it was
 fine, but I did it just for the hallibut.

I donated a dollar to Jerry;s Squids the other day.

Dave

 Fishy puns aside, I used my D-FA 100mm f2.8 macro (shot wide open) and it
 looks like my camera is spot-on.  Are there really any benefits to checking
 focus with other lenses if one lens with very shallow DOF shows accurate
 results?  If there are, I'm very curious as to why that is.

 Thanks,
 John

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Re: K10 Debug Mode

2007-03-18 Thread William Robb

- Original Message - 
From: John Celio
Subject: Re: K10 Debug Mode


I tested my K10D's focusing accuracy a couple nights ago.  I figured it was
 fine, but I did it just for the hallibut.

 Fishy puns aside, I used my D-FA 100mm f2.8 macro (shot wide open) and it
 looks like my camera is spot-on.  Are there really any benefits to 
 checking
 focus with other lenses if one lens with very shallow DOF shows accurate
 results?  If there are, I'm very curious as to why that is.

Check with short lenses, they have less depth of focus (which is different 
from depth of field).

William Robb 


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Re: K10 Debug Mode

2007-03-18 Thread John Whittingham
On Sun, 18 Mar 2007 17:25:34 -0600, William Robb wrote
 - Original Message - 
 From: John Celio
 Subject: Re: K10 Debug Mode
 
 I tested my K10D's focusing accuracy a couple nights ago.  I figured it was
  fine, but I did it just for the hallibut.
 
  Fishy puns aside, I used my D-FA 100mm f2.8 macro (shot wide open) and it
  looks like my camera is spot-on.  Are there really any benefits to 
  checking
  focus with other lenses if one lens with very shallow DOF shows accurate
  results?  If there are, I'm very curious as to why that is.
 
 Check with short lenses, they have less depth of focus (which is 
 different from depth of field).
 
 William Robb

WTF is depth of focus?

John



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Re: K10 Debug Mode

2007-03-18 Thread Mark Roberts
John Whittingham wrote:

WTF is depth of focus?

Depth of focus is the behind the lens analogue of depth of field. 

Whereas depth of field is the depth of the plane of focus in front of 
the lens (where the subject of your photograph is), depth of focus is 
the depth of the plane *inside* the camera in which acceptable focus is 
achieved. 



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Re: K10 Debug Mode

2007-03-17 Thread Lawrence Kwan
On Fri, 16 Mar 2007, William Robb wrote:
 I downloaded a chart that some guy with a D70 made. It's printed off on an
 8.5x11 sheet of paper. I used the 31mm, at about a 2 or so foot range.
 I haven't checked focus with any other lenses yet, that will be my project
 for tomorrow.

There have been some criticism about the above chart using a 45 degree 
angle method.  I have no idea whether those criticism were valid, and some 
claim that this would introduce errors and force FF or BF.

Another chart http://www.geocities.jp/pen_pen_pentax/focus/ was claimed 
to be better as the focus target was vertical.

I would also like to know if these test charts were better or should we 
use real life objects.

Another word of caution is the lighting.  Users have noticed variation 
whether you are using daylight or tungsten light.


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Re: K10 Debug Mode

2007-03-17 Thread John Whittingham
On Sat, 17 Mar 2007 03:27:24 -0400 (EDT), Lawrence Kwan wrote
 On Fri, 16 Mar 2007, William Robb wrote:
  I downloaded a chart that some guy with a D70 made. It's printed off on an
  8.5x11 sheet of paper. I used the 31mm, at about a 2 or so foot range.
  I haven't checked focus with any other lenses yet, that will be my project
  for tomorrow.
 
 There have been some criticism about the above chart using a 45 
 degree angle method.  I have no idea whether those criticism were 
 valid, and some claim that this would introduce errors and force FF 
 or BF.
 
 Another chart http://www.geocities.jp/pen_pen_pentax/focus/ was 
 claimed to be better as the focus target was vertical.
 
 I would also like to know if these test charts were better or should 
 we use real life objects.
 
 Another word of caution is the lighting.  Users have noticed 
 variation whether you are using daylight or tungsten light.
 
 -- 
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 --Tungsten T3 Enhanced DIA KeyboardNokia Ringtone Convertor--

Ah, now that's the chart I have that I mistakenly thought William was using. 
I'm very curious now, focus shifting between 14mm and 31mm, I think my K10D 
may get seriously interfered with in the not to distant future.

John



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Re: K10 Debug Mode

2007-03-17 Thread Thibouille
William, I did not follow the whole thread but some at DpReview
managed to hack the header of the firmware allowing one to downgrade
from 1.11 to 1.10 (in fact 1.10 with hacked header) and then official
1.10 firmware.

One may like or dislike the method but thought I should mention the possibility.
I did sent that to the list a couple days ago but maybe it didn't make
it to the list.

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Re: K10 Debug Mode

2007-03-17 Thread Jan van Wijk
Hi Bill,

On Fri, 16 Mar 2007 15:59:22 -0600, William Robb wrote:

Bravery overcame foolishness, and I decided to check how accurate my K10 was 
for focus accuracy.
It turns out, not very.
So, armed with the instructions and a focus chart I downloaded a while back, 
decided to adjust the camera.
Now my camera's AF focuses better.
Interestingly, I could see no difference on the screen, but a big difference 
in the sharpness of the pictures.

Did anyone else check their cameras? 

Not yet, need to invest some into it :-)

Did it a year ago with the *istD, but no means of correcting then.
It was off a little on the 50mm 1.4 and the FA* 85 ...

And if so, what were your results?

I'm thinking I won't upgrade my firmware on this camera, in order to 
maintain access to the debug mode.

That is what I will do too ...


Did you test with different lenses ?
If so, was there a large spread in needed correction ?

I would assume testing with fast glass is best ...

Regards, JvW

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Re: K10 Debug Mode

2007-03-17 Thread William Robb

- Original Message - 
From: Lawrence Kwan
Subject: Re: K10 Debug Mode


 On Fri, 16 Mar 2007, William Robb wrote:
 I downloaded a chart that some guy with a D70 made. It's printed off on 
 an
 8.5x11 sheet of paper. I used the 31mm, at about a 2 or so foot range.
 I haven't checked focus with any other lenses yet, that will be my 
 project
 for tomorrow.

 There have been some criticism about the above chart using a 45 degree
 angle method.  I have no idea whether those criticism were valid, and some
 claim that this would introduce errors and force FF or BF.

 Another chart http://www.geocities.jp/pen_pen_pentax/focus/ was claimed
 to be better as the focus target was vertical.

 I would also like to know if these test charts were better or should we
 use real life objects.

 Another word of caution is the lighting.  Users have noticed variation
 whether you are using daylight or tungsten light.

I read the fellow's paper (for the life of me, I don't recall his name), and 
he took quite a bit of effort to debunk the naysayers. Pretty much, it came 
down to the camera not knowing or caring if the test chart is on an angle, 
since it is only being asked to focus on a discrete line on the page.
I used diffuse daylight. If the light spectrum makes a difference, then one 
should run these sorts of tests in the light type used most often.
My own thought on that is people who don't know how to run a test shouldn't 
be running tests.

William Robb


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Re: K10 Debug Mode

2007-03-17 Thread William Robb

- Original Message - 
From: Thibouille
Subject: Re: K10 Debug Mode


 William, I did not follow the whole thread but some at DpReview
 managed to hack the header of the firmware allowing one to downgrade
 from 1.11 to 1.10 (in fact 1.10 with hacked header) and then official
 1.10 firmware.

 One may like or dislike the method but thought I should mention the 
 possibility.
 I did sent that to the list a couple days ago but maybe it didn't make
 it to the list.

I saw that, but decided that it wasn't for me. I won't upgrade to 1.11 until 
I see a pressing need to do so. I don't do trailing curtain sync or many 
multiple exposures, and iirc, that was the major fix in 1.11.

William Robb 


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Re: K10 Debug Mode

2007-03-17 Thread William Robb

- Original Message - 
From: John Whittingham
Subject: Re: K10 Debug Mode




 Ah, now that's the chart I have that I mistakenly thought William was 
 using.
 I'm very curious now, focus shifting between 14mm and 31mm, I think my 
 K10D
 may get seriously interfered with in the not to distant future.

Initially, I used the 31, and got it looking good, then switched to the 14, 
and discovered the error was still there, so I adjusted until the 14 was 
good, and restested the 31, which was also still good.

William Robb 


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Re: K10 Debug Mode

2007-03-17 Thread William Robb
For anyone interested, here is a link to the focus chart and instructions 
that I used.

http://www.focustestchart.com/chart.html

William Robb


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Re: K10 Debug Mode

2007-03-17 Thread William Robb

- Original Message - 
From: Jan van Wijk 
Subject: Re: K10 Debug Mode



 I would assume testing with fast glass is best ...
 

I'll be hauling the 50/1.4 out today

William Robb

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Re: K10 Debug Mode

2007-03-17 Thread Lawrence Kwan
On Sat, 17 Mar 2007, William Robb wrote:
 Initially, I used the 31, and got it looking good, then switched to the 14,
 and discovered the error was still there, so I adjusted until the 14 was
 good, and restested the 31, which was also still good.

Have you checked whether your adjustment has affected the focus at 
infinity or at a distance?  Someone who dialed in some large offset got 
some side effects:

http://forums.dpreview.com/forums/readflat.asp?forum=1036thread=22474864

Something to keep in mind.


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Re: K10 Debug Mode

2007-03-17 Thread William Robb

- Original Message - 
From: Lawrence Kwan
Subject: Re: K10 Debug Mode



 Initially, I used the 31, and got it looking good, then switched to the 
 14,
 and discovered the error was still there, so I adjusted until the 14 was
 good, and restested the 31, which was also still good.

 Have you checked whether your adjustment has affected the focus at
 infinity or at a distance?  Someone who dialed in some large offset got
 some side effects:

 http://forums.dpreview.com/forums/readflat.asp?forum=1036thread=22474864


Thanks for the heads up. It does look like I created a bit of front focus at 
long distance.
I'm thinking that finding a best compromise is going to be what I need to 
do.

William Robb 


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Re: K10 Debug Mode

2007-03-17 Thread William Robb
So, on Lawrences recommendation, I went and fiddled with the AF offset, and 
decided that at distance, the camera now had some front focus issues. A few 
tweaks later, and now I have neutral focus at distance, but the camera will 
now have some back focus, though not as much as when I started, at close 
focus.
I also have been reminded just how very good the FA31mm is at f/8. It is one 
kick ass lens.

William Robb


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Re: K10 Debug Mode

2007-03-17 Thread Godfrey DiGiorgi
After seeing all the hubbub with this stuff on DPReview.com, I  
decided to leave my camera alone and do the fw 1.11 update. The AF is  
close enough and produces excellent results. If I really need  
critical focusing, I focus manually and use a focusing magnifier. It  
only makes sense if I'm using a tripod anyway.

G

On Mar 17, 2007, at 4:32 PM, William Robb wrote:

 So, on Lawrences recommendation, I went and fiddled with the AF  
 offset, and
 decided that at distance, the camera now had some front focus  
 issues. A few
 tweaks later, and now I have neutral focus at distance, but the  
 camera will
 now have some back focus, though not as much as when I started, at  
 close
 focus.
 I also have been reminded just how very good the FA31mm is at f/8.  
 It is one
 kick ass lens.

 William Robb


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K10 Debug Mode

2007-03-16 Thread William Robb
Hi:

Bravery overcame foolishness, and I decided to check how accurate my K10 was 
for focus accuracy.
It turns out, not very.
So, armed with the instructions and a focus chart I downloaded a while back, 
decided to adjust the camera.
Now my camera's AF focuses better.
Interestingly, I could see no difference on the screen, but a big difference 
in the sharpness of the pictures.

Did anyone else check their cameras? And if so, what were your results?

I'm thinking I won't upgrade my firmware on this camera, in order to 
maintain access to the debug mode.

William Robb 


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RE: K10 Debug Mode

2007-03-16 Thread Tom C
Interesting.  Nice that it's adjustable, sad that it comes that way... out 
of calibration so to speak.  Is the focus adjusted at just one distance from 
the focal plane or is it done at varying distances?



Tom C.


From: William Robb [EMAIL PROTECTED]
Reply-To: Pentax-Discuss Mail List pdml@pdml.net
To: Pentax-Discuss Mail List pdml@pdml.net
Subject: K10 Debug Mode
Date: Fri, 16 Mar 2007 15:59:22 -0600

Hi:

Bravery overcame foolishness, and I decided to check how accurate my K10 
was
for focus accuracy.
It turns out, not very.
So, armed with the instructions and a focus chart I downloaded a while 
back,
decided to adjust the camera.
Now my camera's AF focuses better.
Interestingly, I could see no difference on the screen, but a big 
difference
in the sharpness of the pictures.

Did anyone else check their cameras? And if so, what were your results?

I'm thinking I won't upgrade my firmware on this camera, in order to
maintain access to the debug mode.

William Robb


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Re: K10 Debug Mode

2007-03-16 Thread John Whittingham
On Fri, 16 Mar 2007 15:59:22 -0600, William Robb wrote
 Hi:
 
 Bravery overcame foolishness, and I decided to check how accurate my 
 K10 was for focus accuracy. It turns out, not very. So, armed with 
 the instructions and a focus chart I downloaded a while back,
  decided to adjust the camera. Now my camera's AF focuses better. 
 Interestingly, I could see no difference on the screen, but a big 
 difference in the sharpness of the pictures.
 
 Did anyone else check their cameras? And if so, what were your results?
 
 I'm thinking I won't upgrade my firmware on this camera, in order to 
 maintain access to the debug mode.
 
 William Robb

Hi William

I was thinking of doing the same myself but haven't got round to it, life got 
in the way 8)
Did you use a wide angle lens as suggested by some? Or did you check various 
focul lengths for accuracy?

John



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Re: K10 Debug Mode

2007-03-16 Thread William Robb

- Original Message - 
From: John Whittingham
Subject: Re: K10 Debug Mode


 On Fri, 16 Mar 2007 15:59:22 -0600, William Robb wrote
 Hi:

 Bravery overcame foolishness, and I decided to check how accurate my
 K10 was for focus accuracy. It turns out, not very. So, armed with
 the instructions and a focus chart I downloaded a while back,
  decided to adjust the camera. Now my camera's AF focuses better.
 Interestingly, I could see no difference on the screen, but a big
 difference in the sharpness of the pictures.

 Did anyone else check their cameras? And if so, what were your results?

 I'm thinking I won't upgrade my firmware on this camera, in order to
 maintain access to the debug mode.


 I was thinking of doing the same myself but haven't got round to it, life 
 got
 in the way 8)
 Did you use a wide angle lens as suggested by some? Or did you check 
 various
 focul lengths for accuracy?

I used a 31mm. Haven't checked it with other lenses yet. In theory, it 
shouldn't matter what lens or distance is used, but as often happens, theory 
and practicality don't mesh, so I will be doing some more checking tomorrow.

William Robb


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Re: K10 Debug Mode

2007-03-16 Thread Rick Womer
I appear to have missed something.  Does the updated
firmware lack the calibration mode?

--- William Robb [EMAIL PROTECTED] wrote:

 
 - Original Message - 
 From: Tom C
 Subject: RE: K10 Debug Mode
 
 
  Interesting.  Nice that it's adjustable, sad that
 it comes that way... out
  of calibration so to speak.  Is the focus adjusted
 at just one distance 
  from
  the focal plane or is it done at varying
 distances?
 
 I downloaded a chart that some guy with a D70 made.
 It's printed off on an 
 8.5x11 sheet of paper. I used the 31mm, at about a 2
 or so foot range.
 I haven't checked focus with any other lenses yet,
 that will be my project 
 for tomorrow.
 
 William Robb 
 
 
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Re: K10 Debug Mode

2007-03-16 Thread William Robb

- Original Message - 
From: Tom C
Subject: RE: K10 Debug Mode


 Interesting.  Nice that it's adjustable, sad that it comes that way... out
 of calibration so to speak.  Is the focus adjusted at just one distance 
 from
 the focal plane or is it done at varying distances?

I downloaded a chart that some guy with a D70 made. It's printed off on an 
8.5x11 sheet of paper. I used the 31mm, at about a 2 or so foot range.
I haven't checked focus with any other lenses yet, that will be my project 
for tomorrow.

William Robb 


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Re: K10 Debug Mode

2007-03-16 Thread Doug Franklin
William Robb wrote:

 [...] as often happens, theory and practicality don't
 mesh, so I will be doing some more checking tomorrow.

What's the difference between theory and practice?  In theory, there's
no difference.  In practice, there is.

:-)

Got that one from a somewhat philosophical comp sci instructor many
years ago.

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Re: K10 Debug Mode

2007-03-16 Thread William Robb

- Original Message - 
From: Rick Womer
Subject: Re: K10 Debug Mode


I appear to have missed something.  Does the updated
 firmware lack the calibration mode?

It doesn't necessarrily lack it, but they changed the way you get to it to 
prevent people from accessing it.

William Robb 


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Re: K10 Debug Mode

2007-03-16 Thread William Robb
Ok, it's still light enough here that I was able to do some more testing.
I put the 14/2.8 on the camera and did a focus test with it.
Totally out of whack, though in the same direction as I was moving with the 
31mm.
So, I did another adjust until the 14 looked good, and tried again with the 
31. The 31 looks perfect as well.
I'll do some general photography tomorrow and see how things look in the 
real world, but I am confident I just raised the resolution of my camera 
significantly.

William Robb



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Re: K10 Debug Mode

2007-03-16 Thread David Savage
Just out of curiosity which way was it out + or -?

Cheers,

Dave

On 3/17/07, William Robb [EMAIL PROTECTED] wrote:
 Ok, it's still light enough here that I was able to do some more testing.
 I put the 14/2.8 on the camera and did a focus test with it.
 Totally out of whack, though in the same direction as I was moving with the
 31mm.
 So, I did another adjust until the 14 looked good, and tried again with the
 31. The 31 looks perfect as well.
 I'll do some general photography tomorrow and see how things look in the
 real world, but I am confident I just raised the resolution of my camera
 significantly.

 William Robb

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Re: K10 Debug Mode

2007-03-16 Thread William Robb

- Original Message - 
From: David Savage
Subject: Re: K10 Debug Mode


 Just out of curiosity which way was it out + or -?

It was out on the - side. I made a rather large + correction, 180 um to get 
it to where I was happy.
It's funny, I've not thought this camera was doing as well as it should, 
based on the quality of lenses that I use.
It would be interesting to know what Pentax feels is a permissable AF offset 
amount is before one starts doing mechanical adjustments to the AF sensor 
position.

William Robb 


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Re: K10 Debug Mode

2007-03-16 Thread P. J. Alling
You are correct.

Rick Womer wrote:
 I appear to have missed something.  Does the updated
 firmware lack the calibration mode?

 --- William Robb [EMAIL PROTECTED] wrote:

   
 - Original Message - 
 From: Tom C
 Subject: RE: K10 Debug Mode


 
 Interesting.  Nice that it's adjustable, sad that
   
 it comes that way... out
 
 of calibration so to speak.  Is the focus adjusted
   
 at just one distance 
 
 from
 the focal plane or is it done at varying
   
 distances?

 I downloaded a chart that some guy with a D70 made.
 It's printed off on an 
 8.5x11 sheet of paper. I used the 31mm, at about a 2
 or so foot range.
 I haven't checked focus with any other lenses yet,
 that will be my project 
 for tomorrow.

 William Robb 


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 http://farechase.yahoo.com/promo-generic-14795097

   


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