Re: Questions re Pentax made lens filters

2005-06-04 Thread Fred
 high humpty

???  g

Fred




Re: Questions re Pentax made lens filters

2005-06-03 Thread Mark Cassino
That's interesting about the variants of UV filters. Do you carry a lot of 
UV filter variants with you?  How do you decide when to use which one?


I've used primarily Skylight's and have noted that the light transmission 
charts show that some skylights block UV radiation while others do not.  In 
my own kit I went with 49, 58, and 77mm SMC Skylight filters, with step up 
rings to accommodate different size lenses. I did that mostly for the sake 
of consistency and because I trust the quality of Pentax filters, and it 
keeps the system simple.


I've been interested in trying a 'minus blue' filter with BW film - haven't 
gotten around to getting one yet though.


- MCC
- - - - - - - - - - - - - - - - - - - -
Mark Cassino Photography
Kalamazoo, MI
www.markcassino.com
- - - - - - - - - - - - - - - - - - - -
- Original Message - 
From: Shel Belinkoff [EMAIL PROTECTED]

To: pentax-discuss@pdml.net
Sent: Friday, June 03, 2005 12:18 AM
Subject: Re: Questions re Pentax made lens filters



It should be noted that there are different strengths of UV (Sometimes
called haze) filters, as there are skylight filters.  Tiffen, just for an
example,  has several UV filters that they offer:

UV Protector - Protects lens from dust, moisture, scratches, and breakage.


Haze 1 - Reduces excessive blue haze caused by UV light by absorbing 71% 
of

UV.  Recommended for all-around UV control.

Haze 2A - Absorbs all UV light; reduces haze; maintains color and image
clarity.  Best for high altitude and marine scenes.

UV 17 - Created for the photographer who wants to absorb most but not all
UV light.  It absorbs slightly less UV light than the Haze 2A.

Warm UV - combines the benefits of the UV 17 with the Tiffen 812 Color
Warming Filter for added warmth.

Other companies may have similar variations in their filter lineup.  B+W
has several variants of the UV or Haze filter.  In some situations the
minus blue filter may be a better choice for eliminating the blue found
at high altitudes and in other environments, but not all companies make
such a filter, which is a yellow filter that falls within a particular
range.  Not every yellow filter has the same characteristics.

One B+W UV filter is the KR6, which is suited for daylight with a high
percentage of blue (midday in the mountains during the summer), and which
is recommended for color film.used in situations where an extreme blue 
tone
is to be expected. Not only does it block ultraviolet light and reduce 
blue

tones in the shade, but it also penetrates light fog.

The bottom line is that it's easy to slap a UV filter on your lens and
believe you're getting a certain result, such as the results provided by
some of the above and similar filters.  Unfortunately, many people believe
a UV filter is a UV filter, or that all skylight filters are the same.
Such is not the case, and the clever photographer chooses his or her 
filter

with careful thought to the desired results.

As for cleaning Multi-Coated filters, the two best cleaners that I;ve come
across are the ones sold by The Filter Connection (I think it's their MC
formula) and the cleaner sold by ClearSight.  Both do a remarkable job 
with

no streaking or leaving of residual haze or film, as another perennial
favorite, ROR, cab do if not carefully applied.

Shel



[Original Message]
From: Mark Cassino



Hi Boris -

I did a simple test with Hoya HMC filters vs Pentax SMC - I took them out
into the sun and tried to see how much of a reflection I could bounce off
the filter onto a dark wall.  The SMC filter was noticeably better in

this

test.

Does it mean anything?  I don't know, but I use a filter on my A* 200

macro

to protect the front element, and I figure it's penny wise but pound

foolish

to slap an inferior filter on an excellent lens.

In regards to protective filters - I only use them when there are

identified

risks that could damage the lens. Like little children and food (it's

nice

to be able to just smile at a little tyke who just put his greasy finger

on

the _filter_ in front of your camera lens, as opposed to traumatizing him

by

snatching the camera away)  For macros in the field I use a protect
filter because it's easy to poke the front element of a lens when you are
poking around in brush etc - and when you have the lens set to close

focus,

you don't always see potential hazards in the finder. Bus absent an
identified risk, I don;t use a filter unless I need the filter effect.

It's also important to take into consideration those situations where a

UV

filter or Skylight is truly valuable for it's optical effect. I think
there's a tendency to view these filters as merely being protective, but
they will actually improve sharpness, cut haze, and help color saturation
when shooting outdoors, particularly if you are shooting distant

subjects,

in bright sun, in situations with high humpty, dust, or smog.

I don't know why, but I've found cleaning multicoated filters (Pentax,

Hoya

Re: Questions re Pentax made lens filters

2005-06-03 Thread Shel Belinkoff
Hi Mark ...

No, I don't carry many, if any, filters with me.  I use a minimal number of
filters IAC, but, when shooting a specific situation and looking for a
particular effect, then it's time to consider which, if any, filter variant
may be used. If, for example, I was heading to the mountains, I may take a
Haze 2A or equivalent, and/or a minus blue depending on film choice,
etc., but around town I may not carry or use any filter at all.

Shel 


 [Original Message]
 From: Mark Cassino 

 That's interesting about the variants of UV filters. Do you carry a lot
of 
 UV filter variants with you?  How do you decide when to use which one?

 I've used primarily Skylight's and have noted that the light transmission 
 charts show that some skylights block UV radiation while others do not. 
In 
 my own kit I went with 49, 58, and 77mm SMC Skylight filters, with step
up 
 rings to accommodate different size lenses. I did that mostly for the
sake 
 of consistency and because I trust the quality of Pentax filters, and it 
 keeps the system simple.

 I've been interested in trying a 'minus blue' filter with BW film -
haven't 
 gotten around to getting one yet though.

 - MCC
 - - - - - - - - - - - - - - - - - - - -
 Mark Cassino Photography
 Kalamazoo, MI
 www.markcassino.com
 - - - - - - - - - - - - - - - - - - - -
 - Original Message - 
 From: Shel Belinkoff [EMAIL PROTECTED]
 To: pentax-discuss@pdml.net
 Sent: Friday, June 03, 2005 12:18 AM
 Subject: Re: Questions re Pentax made lens filters


  It should be noted that there are different strengths of UV (Sometimes
  called haze) filters, as there are skylight filters.  Tiffen, just for
an
  example,  has several UV filters that they offer:
 
  UV Protector - Protects lens from dust, moisture, scratches, and
breakage.
 
 
  Haze 1 - Reduces excessive blue haze caused by UV light by absorbing
71% 
  of
  UV.  Recommended for all-around UV control.
 
  Haze 2A - Absorbs all UV light; reduces haze; maintains color and image
  clarity.  Best for high altitude and marine scenes.
 
  UV 17 - Created for the photographer who wants to absorb most but not
all
  UV light.  It absorbs slightly less UV light than the Haze 2A.
 
  Warm UV - combines the benefits of the UV 17 with the Tiffen 812 Color
  Warming Filter for added warmth.
 
  Other companies may have similar variations in their filter lineup.  B+W
  has several variants of the UV or Haze filter.  In some situations the
  minus blue filter may be a better choice for eliminating the blue
found
  at high altitudes and in other environments, but not all companies make
  such a filter, which is a yellow filter that falls within a particular
  range.  Not every yellow filter has the same characteristics.
 
  One B+W UV filter is the KR6, which is suited for daylight with a high
  percentage of blue (midday in the mountains during the summer), and
which
  is recommended for color film.used in situations where an extreme blue 
  tone
  is to be expected. Not only does it block ultraviolet light and reduce 
  blue
  tones in the shade, but it also penetrates light fog.
 
  The bottom line is that it's easy to slap a UV filter on your lens and
  believe you're getting a certain result, such as the results provided by
  some of the above and similar filters.  Unfortunately, many people
believe
  a UV filter is a UV filter, or that all skylight filters are the same.
  Such is not the case, and the clever photographer chooses his or her 
  filter
  with careful thought to the desired results.
 
  As for cleaning Multi-Coated filters, the two best cleaners that I;ve
come
  across are the ones sold by The Filter Connection (I think it's their MC
  formula) and the cleaner sold by ClearSight.  Both do a remarkable job 
  with
  no streaking or leaving of residual haze or film, as another perennial
  favorite, ROR, cab do if not carefully applied.
 
  Shel




Re: Questions re Pentax made lens filters

2005-06-02 Thread Mark Cassino

Hi Boris -

I did a simple test with Hoya HMC filters vs Pentax SMC - I took them out 
into the sun and tried to see how much of a reflection I could bounce off 
the filter onto a dark wall.  The SMC filter was noticeably better in this 
test.


Does it mean anything?  I don't know, but I use a filter on my A* 200 macro 
to protect the front element, and I figure it's penny wise but pound foolish 
to slap an inferior filter on an excellent lens.


In regards to protective filters - I only use them when there are identified 
risks that could damage the lens. Like little children and food (it's nice 
to be able to just smile at a little tyke who just put his greasy finger on 
the _filter_ in front of your camera lens, as opposed to traumatizing him by 
snatching the camera away)  For macros in the field I use a protect 
filter because it's easy to poke the front element of a lens when you are 
poking around in brush etc - and when you have the lens set to close focus, 
you don't always see potential hazards in the finder. Bus absent an 
identified risk, I don;t use a filter unless I need the filter effect.


It's also important to take into consideration those situations where a UV 
filter or Skylight is truly valuable for it's optical effect. I think 
there's a tendency to view these filters as merely being protective, but 
they will actually improve sharpness, cut haze, and help color saturation 
when shooting outdoors, particularly if you are shooting distant subjects, 
in bright sun, in situations with high humpty, dust, or smog.


I don't know why, but I've found cleaning multicoated filters (Pentax, Hoya, 
and Sigma EX) to be very difficult. Maybe because you can rotate it and 
really examine the glass, and any little imperfection is more apparent. I've 
found Kodak lens cleaning paper to do the trick - after thoroughly cleaning 
with a microfiber cloth, a few wipes with a single sheet of paper does it.


- MCC

- - - - - - - - - - - - - - - - - - - -
Mark Cassino Photography
Kalamazoo, MI
www.markcassino.com
- - - - - - - - - - - - - - - - - - - -
- Original Message - 
From: Boris Liberman [EMAIL PROTECTED]

To: pentax-discuss@pdml.net
Sent: Monday, May 30, 2005 9:32 AM
Subject: Questions re Pentax made lens filters



Hi!

For some time I've been using el cheapo (Cokin plastic et al)
protective filters on my lenses. Some time ago I stopped doing so.
Then recently I found that some of my lenses are now dusty inside.
Then on eekBay I found that there are Pentax made lens filters. Some
of them are even SMC.

Are they worth it? How do they compare to other manufacturer's filters?

Finally, but please don't let it be a flame, if not Pentax, what are
the protective filters that match optical quality of lenses such as FA
50/1.7 or M 50/1.4 that I have?

Then of course as usualy I may be nuts again... I mean may be filters
have nothing to do with dust inside lenses...

Thanks.

--
Boris





Re: Questions re Pentax made lens filters

2005-06-02 Thread Shel Belinkoff
It should be noted that there are different strengths of UV (Sometimes
called haze) filters, as there are skylight filters.  Tiffen, just for an
example,  has several UV filters that they offer:

UV Protector - Protects lens from dust, moisture, scratches, and breakage. 


Haze 1 - Reduces excessive blue haze caused by UV light by absorbing 71% of
UV.  Recommended for all-around UV control.

Haze 2A - Absorbs all UV light; reduces haze; maintains color and image
clarity.  Best for high altitude and marine scenes. 

UV 17 - Created for the photographer who wants to absorb most but not all
UV light.  It absorbs slightly less UV light than the Haze 2A.

Warm UV - combines the benefits of the UV 17 with the Tiffen 812 Color
Warming Filter for added warmth.  

Other companies may have similar variations in their filter lineup.  B+W
has several variants of the UV or Haze filter.  In some situations the 
minus blue filter may be a better choice for eliminating the blue found
at high altitudes and in other environments, but not all companies make
such a filter, which is a yellow filter that falls within a particular
range.  Not every yellow filter has the same characteristics.

One B+W UV filter is the KR6, which is suited for daylight with a high
percentage of blue (midday in the mountains during the summer), and which
is recommended for color film.used in situations where an extreme blue tone
is to be expected. Not only does it block ultraviolet light and reduce blue
tones in the shade, but it also penetrates light fog. 

The bottom line is that it's easy to slap a UV filter on your lens and
believe you're getting a certain result, such as the results provided by
some of the above and similar filters.  Unfortunately, many people believe
a UV filter is a UV filter, or that all skylight filters are the same. 
Such is not the case, and the clever photographer chooses his or her filter
with careful thought to the desired results.

As for cleaning Multi-Coated filters, the two best cleaners that I;ve come
across are the ones sold by The Filter Connection (I think it's their MC
formula) and the cleaner sold by ClearSight.  Both do a remarkable job with
no streaking or leaving of residual haze or film, as another perennial
favorite, ROR, cab do if not carefully applied.

Shel 


 [Original Message]
 From: Mark Cassino 

 Hi Boris -

 I did a simple test with Hoya HMC filters vs Pentax SMC - I took them out 
 into the sun and tried to see how much of a reflection I could bounce off 
 the filter onto a dark wall.  The SMC filter was noticeably better in
this 
 test.

 Does it mean anything?  I don't know, but I use a filter on my A* 200
macro 
 to protect the front element, and I figure it's penny wise but pound
foolish 
 to slap an inferior filter on an excellent lens.

 In regards to protective filters - I only use them when there are
identified 
 risks that could damage the lens. Like little children and food (it's
nice 
 to be able to just smile at a little tyke who just put his greasy finger
on 
 the _filter_ in front of your camera lens, as opposed to traumatizing him
by 
 snatching the camera away)  For macros in the field I use a protect 
 filter because it's easy to poke the front element of a lens when you are 
 poking around in brush etc - and when you have the lens set to close
focus, 
 you don't always see potential hazards in the finder. Bus absent an 
 identified risk, I don;t use a filter unless I need the filter effect.

 It's also important to take into consideration those situations where a
UV 
 filter or Skylight is truly valuable for it's optical effect. I think 
 there's a tendency to view these filters as merely being protective, but 
 they will actually improve sharpness, cut haze, and help color saturation 
 when shooting outdoors, particularly if you are shooting distant
subjects, 
 in bright sun, in situations with high humpty, dust, or smog.

 I don't know why, but I've found cleaning multicoated filters (Pentax,
Hoya, 
 and Sigma EX) to be very difficult. Maybe because you can rotate it and 
 really examine the glass, and any little imperfection is more apparent.
I've 
 found Kodak lens cleaning paper to do the trick - after thoroughly
cleaning 
 with a microfiber cloth, a few wipes with a single sheet of paper does it.

 - MCC

 - - - - - - - - - - - - - - - - - - - -
 Mark Cassino Photography
 Kalamazoo, MI
 www.markcassino.com
 - - - - - - - - - - - - - - - - - - - -
 - Original Message - 
 From: Boris Liberman [EMAIL PROTECTED]
 To: pentax-discuss@pdml.net
 Sent: Monday, May 30, 2005 9:32 AM
 Subject: Questions re Pentax made lens filters


  Hi!
 
  For some time I've been using el cheapo (Cokin plastic et al)
  protective filters on my lenses. Some time ago I stopped doing so.
  Then recently I found that some of my lenses are now dusty inside.
  Then on eekBay I found that there are Pentax made lens filters. Some
  of them are even SMC.
 
  Are they worth it? How do

Re: Questions re Pentax made lens filters

2005-06-02 Thread Boris Liberman

Hi!

Har! I have one Vivitar VMC filter that is real bitch to clean :).

I suppose I will eventually get across the pond and then the shopping 
will happen.


Thanks Shel and thanks Mark - your comments are very much appreciated.

Boris



Re: Questions re Pentax made lens filters

2005-06-01 Thread Boris Liberman
Hi!

 If I may make a suggestion

Yes of course...

 Seriously, don't go out and buy a bunch of clear glass.
 It's not really time consuming to change filters. If you are in an all fired
 rush to get some glass, get a really good polarizer in each of the sizes you
 use, and one protective filter in each of the sizes you use.
 If you still shoot BW film, consider some filters for that.

I have two Cokin A system holders and a good bunch of filters
including polarizer...

So perhaps it would translate your suggestion to buying just one
protective 49 mm and one protective 52 mm... Well, given what
eBay/PDML offers I will do more or less just that.

May I ask what is it mail order? And can I use mail order from Israel?

-- 
Boris



Re: Questions re Pentax made lens filters

2005-06-01 Thread Jostein
Quoting Boris Liberman [EMAIL PROTECTED]:

 May I ask what is it mail order? And can I use mail order from Israel?

Mail order is what you do when you buy things from shops and have them sent to
you by mail. Like BH. :-)

Jostein


This message was sent using IMP, the Internet Messaging Program.



Re: Questions re Pentax made lens filters

2005-05-31 Thread Frantisek

Tuesday, May 31, 2005, 4:09:32 AM, Fred wrote:
 I like both Pentax SMC and Hoya HMC filters (and, I've found the Hoya
 HMC's easier to clean).  I've never tried a Hoya SHMC - it does sound
 like a marketing ploy - g.

 LOL. I happen to have HMC (97%)  Super HMC (99.7%). The Super HMC is
 indeed more flare resistance and shows less reflection when compared side
 by side.

F That's interesting, Alan.  Maybe I should try an HSMC filter and see for
F myself then...  Thanks for the report.

Hi Fred,

I have had a similar experience as Alan. There is indeed a small
difference between HMC and SHMC. Not much but sometimes visible.

Good light!
   fra



Re: Questions re Pentax made lens filters

2005-05-31 Thread Fred
F That's interesting, Alan.  Maybe I should try an HSMC filter and see for
F myself then...  Thanks for the report.

 Hi Fred,

 I have had a similar experience as Alan. There is indeed a small
 difference between HMC and SHMC. Not much but sometimes visible.

Ah, good - thanks, Frantisek.

Fred




Re: Questions re Pentax made lens filters

2005-05-31 Thread Norman Baugher

Ditto. Except for the Pentax bayonet mount ones for the P67 lenses...
Norm

William Robb wrote:


My preference for filters has always been B+W.





Re: Questions re Pentax made lens filters

2005-05-31 Thread Shel Belinkoff
I prefer the Pentax SMC filters and the MRC B+W filters. 

Shel 


 [Original Message]
 From: Norman Baugher

 Ditto. Except for the Pentax bayonet mount ones for the P67 lenses...
 Norm

 William Robb wrote:

  My preference for filters has always been B+W.





Re: Questions re Pentax made lens filters

2005-05-31 Thread Boris Liberman

Hi!

Shel: I prefer the Pentax SMC filters and the MRC B+W filters. 

Norman Baugher: Ditto. Except for the Pentax bayonet mount ones for the P67 
lenses...
William Robb: My preference for filters has always been B+W.


Very well. I see the point. Thanks everyone who responded...

I suppose I am going to buy me some 49 mm and 52 mm protective filters 
for my most valuable lenses...


The final question: what is the a decent price for a decent condition 
SMCP or MRC B+W filters? Anyone willing to enable me? Seriously.


Boris



Re: Questions re Pentax made lens filters

2005-05-31 Thread William Robb


- Original Message - 
From: Boris Liberman

Subject: Re: Questions re Pentax made lens filters





I suppose I am going to buy me some 49 mm and 52 mm protective filters for 
my most valuable lenses...


If I may make a suggestion

Seriously, don't go out and buy a bunch of clear glass.
It's not really time consuming to change filters. If you are in an all fired 
rush to get some glass, get a really good polarizer in each of the sizes you 
use, and one protective filter in each of the sizes you use.

If you still shoot BW film, consider some filters for that.



The final question: what is the a decent price for a decent condition SMCP 
or MRC B+W filters? Anyone willing to enable me? Seriously.


eBay, or mail order...

William Robb





Questions re Pentax made lens filters

2005-05-30 Thread Boris Liberman
Hi!

For some time I've been using el cheapo (Cokin plastic et al)
protective filters on my lenses. Some time ago I stopped doing so.
Then recently I found that some of my lenses are now dusty inside.
Then on eekBay I found that there are Pentax made lens filters. Some
of them are even SMC.

Are they worth it? How do they compare to other manufacturer's filters? 

Finally, but please don't let it be a flame, if not Pentax, what are
the protective filters that match optical quality of lenses such as FA
50/1.7 or M 50/1.4 that I have?

Then of course as usualy I may be nuts again... I mean may be filters
have nothing to do with dust inside lenses...

Thanks.

-- 
Boris



Re: Questions re Pentax made lens filters

2005-05-30 Thread Kostas Kavoussanakis
On Mon, 30 May 2005, Boris Liberman wrote:

 Then of course as usualy I may be nuts again... I mean may be filters
 have nothing to do with dust inside lenses...

I should think so. If you mentioned scratches on the front element
though...

To your question, SMC Pentax filters are highly reputed. Hoya HMC are
good and affordable; I have even heard that going SHMC is falling for
marketing ploy. I have also used Heliopan filters (for BW) and was
amazed by the smoothness of fitting.

I only use filters for BW anymore, and that seldom as they reduce my
ability to focus in low light.

Kostas



Re: Questions re Pentax made lens filters

2005-05-30 Thread Fred
 I mean may be filters have nothing to do with dust inside lenses...

Indeed.  I think most internal dust enters between moving parts (when
focusing (and zooming, with zooms) (and perhaps also through the mount
end).  I think front filters have very little to do with internal dust (but
a lot to do with dust on the front element - g).

Furthermore, I think that any lens that focuses without changing length
(e.g., IF lenses) will gather less internal dust than those lenses that
focus (and/or zoom) by acting as a bellows, sucking in and blowing out air
every time their helicoids are exercised.

Even in the case of the above bellows-action lenses, keeping their
outsides as free of dust as possible helps - why have dust sitting on them
just waiting to be sucked in the next time they are focused?

One interesting way of coping with this bellows-action ability to collect
internal dust is in the VS1 600/8 and 800/11 Solid Cats - there are four
little air filters over four openings at the back of the lens, intended to
filter air on the way in when the lenses are focused closer (which is when
air would be sucked in).  Presumably the internal construction of these
lenses includes some gasketry that slows down dust entering at the edge
of the focus ring, or the filters would not be very effective.

Fred




Re: Questions re Pentax made lens filters

2005-05-30 Thread Fred
 To your question, SMC Pentax filters are highly reputed. Hoya HMC are
 good and affordable; I have even heard that going SHMC is falling for
 marketing ploy. I have also used Heliopan filters (for BW) and was
 amazed by the smoothness of fitting.

I like both Pentax SMC and Hoya HMC filters (and, I've found the Hoya HMC's
easier to clean).  I've never tried a Hoya SHMC - it does sound like a
marketing ploy - g.

I once tried getting a couple of Heliopan filters but could not seem to
locate multicoated ones, so I gave up.

I don't use filters all the time - I try to use filters only on frequently
used lenses that see a lot of outdoors service.

Fred




Re: Questions re Pentax made lens filters

2005-05-30 Thread Sylwester Pietrzyk
Boris Liberman wrote on 30.05.05 15:32:

 Are they worth it? How do they compare to other manufacturer's filters?
Boris,
main problem with filters is that they can cause unwanted flare and gosting.
That's why SMC-coated filters theoretically should be the best. However I
use Marumi WPC thin filters and they are quite good too and with more
scratch and moisture resistant coatings (Water Proof Coated) - something
similar to B+W MRC. More on flare and gosting when using UV filters you can
read here:
http://www.luminous-landscape.com/columns/sm-feb-05.shtml

-- 
Balance is the ultimate good...

Best Regards
Sylwek



Re: Questions re Pentax made lens filters

2005-05-30 Thread Alan Chan
--- Boris Liberman [EMAIL PROTECTED] wrote:
 Are they worth it? How do they compare to other manufacturer's filters? 

Consider used SMC filters are expensive, I'd say it's better to buy brand new 
B+W
MRC or HOYA SUPER HMC.

 Finally, but please don't let it be a flame, if not Pentax, what are
 the protective filters that match optical quality of lenses such as FA
 50/1.7 or M 50/1.4 that I have?

I am a sharpness nut, but I honestly do not think it is such a big deal. Have 
been
using HOYA monocoated, HMC, Super HMC, Nikon, Pentax, B+W and some others. Some 
very
low quality like uncoated, Cokin resin or Tiffen degrade the image quality, but
coated HOYA, Nikon, Pentax  B+W do not show any difference at all. The thing 
is,
when the front of the lens was hit by any strong light, even the best filter 
flares,
simple as that.

 Then of course as usualy I may be nuts again... I mean may be filters
 have nothing to do with dust inside lenses...

Of course not.  :-)

Alan Chan
http://www.pbase.com/wlachan



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Re: Questions re Pentax made lens filters

2005-05-30 Thread Alan Chan
 I am a sharpness nut, but I honestly do not think it is such a big deal. Have 
 been
 using HOYA monocoated, HMC, Super HMC, Nikon, Pentax, B+W and some others. 
 Some
 very
 low quality like uncoated, Cokin resin or Tiffen degrade the image quality, 
 but
 coated HOYA, Nikon, Pentax  B+W do not show any difference at all. The thing 
 is,
 when the front of the lens was hit by any strong light, even the best filter
 flares,
 simple as that.

But if cost/quality is concerned, I recommend HOYA HMC (or Super HMC if you 
managed
to buy them as cheap). Some people having difficulty to clean HOYA coating, but
folded toilet paper with acetone will restore them in factory condition, just 
don't
rub them hard.

Alan Chan
http://www.pbase.com/wlachan

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Re: Questions re Pentax made lens filters

2005-05-30 Thread Alan Chan
--- Fred [EMAIL PROTECTED] wrote:
 I like both Pentax SMC and Hoya HMC filters (and, I've found the Hoya HMC's
 easier to clean).  I've never tried a Hoya SHMC - it does sound like a
 marketing ploy - g.

LOL. I happen to have HMC (97%)  Super HMC (99.7%). The Super HMC is indeed 
more
flare resistance and shows less reflection when compared side by side. Pity 
recent
HOYA rims are not as nicely made as they used to.

Alan Chan
http://www.pbase.com/wlachan



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Re: Questions re Pentax made lens filters

2005-05-30 Thread William Robb


- Original Message - 
From: Boris Liberman

Subject: Questions re Pentax made lens filters



Hi!

For some time I've been using el cheapo (Cokin plastic et al)
protective filters on my lenses. Some time ago I stopped doing so.
Then recently I found that some of my lenses are now dusty inside.
Then on eekBay I found that there are Pentax made lens filters. Some
of them are even SMC.

Are they worth it? How do they compare to other manufacturer's filters?

Finally, but please don't let it be a flame, if not Pentax, what are
the protective filters that match optical quality of lenses such as FA
50/1.7 or M 50/1.4 that I have?

Then of course as usualy I may be nuts again... I mean may be filters
have nothing to do with dust inside lenses...


I don't keep protective filters on my lenses unless I am putting the front 
of the lens at some risk by not doing so.

However, I do keep some protective filters around in case I want one.

My preference for filters has always been B+W.
I think they make 2 lines now, one with aluminium rings, the other with 
brass. The brass ones won't weld themselves onto the front of the lens.

I've never been concerned with the quality of the glass they use.
I don't think a filter will keep dust from getting into a lens.

William Robb




Re: Questions re Pentax made lens filters

2005-05-30 Thread Fred
 I like both Pentax SMC and Hoya HMC filters (and, I've found the Hoya
 HMC's easier to clean).  I've never tried a Hoya SHMC - it does sound
 like a marketing ploy - g.

 LOL. I happen to have HMC (97%)  Super HMC (99.7%). The Super HMC is
 indeed more flare resistance and shows less reflection when compared side
 by side.

That's interesting, Alan.  Maybe I should try an HSMC filter and see for
myself then...  Thanks for the report.

Fred