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UV Filter or Not? You be the judge.
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Oct 5, 2015 16:11:39   #
CHOLLY Loc: THE FLORIDA PANHANDLE!
 
Rick from NY wrote:
Precisely why I wrote my post asking the moderators to close this thread. I got back the usual snarky crap "that if I don't want to follow the thread, I can ignore it." Entirely missed the point of course. i suggested closing the thread not because I didn't want to follow it; I suggested closing it since it deteriorated into name calling, pettiness and all the rest.

So my final question is, "Does UHH actually have moderators, and if it does, how do they allow this nastiness to continue?"
Precisely why I wrote my post asking the moderator... (show quote)


:?:

There was nothing "snarky" about the advice to ignore a thread you don't find interesting. Remember; NO ONE is required to read anything here and if you find the direction of a thread objectionable, then by all means the correct response is to AVOID it, not call for it to be closed.

As to your point... well... the Admin. here can and DOES take action against individuals who violate the terms of agreement regarding personal conduct. If you have a problem with a post or poster, report it. Give your reasons. If a poster or post is in violation, the Administration WILL take action.

Have a good day.

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Oct 5, 2015 16:25:36   #
freddayan Loc: Pasadena, California
 
Viewing on my iMac Retina monitor, I see no difference at all.

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Oct 5, 2015 16:26:24   #
blackest Loc: Ireland
 
It's an interesting result I expected the image to be degraded which is why I picked 1 for the filter and 2 for marginally better IQ ...
On the other hand would an nd filter degrade image quality?
wouldnt the same arguments about degraded IQ apply ...

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Oct 5, 2015 16:26:28   #
CHOLLY Loc: THE FLORIDA PANHANDLE!
 
Exactly.

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Oct 5, 2015 16:27:09   #
Shoeless_Photographer Loc: Lexington
 
Screamin Scott wrote:
While a bit dated, this is a Polish test of UV filters you might want to peruse...After all, you asked for unbiased proof

http://www.lenstip.com/113.2-article-UV_filters_test_A_few_words_about_UV_radiation.html



If the lens elements disperse most of the UV radiation, I wonder how need there would be for a UV filter. I would think the difference in the thickness of the glass would make the lens much better at eliminating most of the UV light, and the filter would play a very minimal role.

Perhaps a good solution would be to protect the lens while in transit, and remove the filter only when it's time for the shot. These would make that job nearly effortless. They look intriguing, but I've not tried them. Anyone have any opinions or experience with these?

http://www.xumeadapters.com/

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Oct 5, 2015 16:29:07   #
mwsilvers Loc: Central New Jersey
 
CHOLLY wrote:

...As to your point... well... the Admin. here can and DOES take action against individuals who violate the terms of agreement regarding personal conduct. If you have a problem with a post or poster, report it. Give your reasons. If a poster or post is in violation, the Administration WILL take action.


Actually Admin doesn't seem to do much to quell inappropriate behavior in my experience. In a controversial thread that got nasty, probably related to post processing or filter use, or Nikon v Canon, or some such silliness, a poster threatened to hurt me by punching me in the nose. It was an idle threat I'm sure, but when I complained to Admin about it their advice was to ignore it and avoid future contact with the person who threatened me. I did not get a warm fuzzy feeling.

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Oct 5, 2015 16:34:30   #
Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga
 
Jerry here on UHH uses & swears by them. I got a 67mm one to try out on a Tamron 17-50mm F2.8, but just got it & have yet to try it out. Granted, I will be using it with ND & Polarizing filters though, not UV. In transit, I use the lens cap & /or hood.
Shoeless_Photographer wrote:
If the lens elements disperse most of the UV radiation, I wonder how need there would be for a UV filter. I would think the difference in the thickness of the glass would make the lens much better at eliminating most of the UV light, and the filter would play a very minimal role.

Perhaps a good solution would be to protect the lens while in transit, and remove the filter only when it's time for the shot. These would make that job nearly effortless. They look intriguing, but I've not tried them. Anyone have any opinions or experience with these?

http://www.xumeadapters.com/
If the lens elements disperse most of the UV radia... (show quote)

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Oct 5, 2015 17:17:22   #
Shoeless_Photographer Loc: Lexington
 
Screamin Scott wrote:
Jerry here on UHH uses & swears by them. I got a 67mm one to try out on a Tamron 17-50mm F2.8, but just got it & have yet to try it out. Granted, I will be using it with ND & Polarizing filters though, not UV. In transit, I use the lens cap & /or hood.




What I wasn't sure about ... and let me know when you have a chance to try them out ... is: can I use a lens hood with it, or is it one or the other? I love the idea of being able to swap in or out a CPL or ND filter in a few seconds. It's like the difference between the old school screw-on tripod head vs. a quick release.

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Oct 5, 2015 18:30:03   #
RWR Loc: La Mesa, CA
 
blackest wrote:
It's an interesting result I expected the image to be degraded which is why I picked 1 for the filter and 2 for marginally better IQ ...
On the other hand would an nd filter degrade image quality?
wouldnt the same arguments about degraded IQ apply ...


Any glass (or resin) on your lens that was not included in the optical formula is bound to have an effect of some sort on the image. However, with a quality, perfectly flat filter the effect will be negligible. After all, filters have been used routinely with film, particularly black and white, since about day one of photography and countless millions of photographs have been made with them with scarcely a mention of image quality degradation. It really is pretty much a moot point.

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Oct 5, 2015 18:39:08   #
Screamin Scott Loc: Marshfield Wi, Baltimore Md, now Dallas Ga
 
You can't use your lens caps (they sell some to overcome this issue) but I would think you could still use your bayonet style hoods as they are larger than the lens filter . As for screw in type hoods, well maybe the filter adapter could be screwed onto one, but I don't think it would hold very well
Shoeless_Photographer wrote:
What I wasn't sure about ... and let me know when you have a chance to try them out ... is: can I use a lens hood with it, or is it one or the other? I love the idea of being able to swap in or out a CPL or ND filter in a few seconds. It's like the difference between the old school screw-on tripod head vs. a quick release.

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Oct 5, 2015 19:04:16   #
papakatz45 Loc: South Florida-West Palm Beach
 
CHOLLY wrote:
I have to correct you again.

GOOD science corrects for any bias and can be repeated by independent research. Additionally, facts are just that; facts. Contrary to modern belief, they are not debatable.

The laws of Physics are not subject to change because of human opinion. Filters filter, and that results in degradation of image quality. Filters add additional surfaces in the light path which in turn, introduces diffraction that was not calculated or compensated for in the optical formula of the lens. The result is a reduction of contrast, sharpness/resolution, flare, and ghosting... all totally unnecessary and avoidable.

As stated numerous times earlier, the best that can be done with current technology is a reduction of those negative effects... but not elimination. That is fact... not opinion.

And while the OP may wish to assert that there is no difference in image quality with filters on or off, as stated earlier, this is NOT a valid test, nor are the results applicable to ANY other photographic situation. It is a very poor demonstration of anything OTHER than his incorrect assertion that filters don't affect image quality.

And again, if filters were meant to or even needed to protect the front element of a lens, lens manufacturers would recommend them and filter manufacturers would warrant their "protective" capacity. The fact that neither does speaks volume about the designed purpose and use of uv/Protective filters.
I have to correct you again. br br b GOOD /b sc... (show quote)


Just reviewed Canon, Nikon, B&W and Hoya sites regarding their UV/Protective filters. All four sites clearly state one of the uses for these filters is for protection of your lens. As I stated, the filter may cause very minor distortion but in almost all cases is undetectable to the human eye under normal conditions. So until you can show me unbiased testing under controlled conditions, you are free to have your opinion, which is all it is. Not fact.

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Oct 5, 2015 19:08:47   #
revhen Loc: By the beautiful Hudson
 
Screamin Scott wrote:
You can't use your lens caps (they sell some to overcome this issue) but I would think you could still use your bayonet style hoods as they are larger than the lens filter . As for screw in type hoods, well maybe the filter adapter could be screwed onto one, but I don't think it would hold very well


I screw my screw in hood into the filter then I can also put my lens cap inside the hood and onto the filter. Go figure.

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Oct 5, 2015 19:21:15   #
blackest Loc: Ireland
 
revhen wrote:
I screw my screw in hood into the filter then I can also put my lens cap inside the hood and onto the filter. Go figure.


They are referencing xume filter holder/adapter basically a magnetic holder so no screwing needed. The problem might be the weight of the hood may overcome the strength of the magnet. I think it adapts your existing filters.

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Oct 5, 2015 19:24:22   #
Shoeless_Photographer Loc: Lexington
 
Screamin Scott wrote:
You can't use your lens caps (they sell some to overcome this issue) but I would think you could still use your bayonet style hoods as they are larger than the lens filter . As for screw in type hoods, well maybe the filter adapter could be screwed onto one, but I don't think it would hold very well


I could live with that. Thanks for the feedback.

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Oct 5, 2015 19:25:49   #
Shoeless_Photographer Loc: Lexington
 
RWR wrote:
Any glass (or resin) on your lens that was not included in the optical formula is bound to have an effect of some sort on the image. However, with a quality, perfectly flat filter the effect will be negligible. After all, filters have been used routinely with film, particularly black and white, since about day one of photography and countless millions of photographs have been made with them with scarcely a mention of image quality degradation. It really is pretty much a moot point.



Do old film era filters tend to shift color over time? I've got an old skylight / UV filter that seems to create a bit of yellow compared to not having the filter on.

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