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General photography questions and answers: Discuss Filter's yes or no...There seem's to be 2 schools of thought on this one do you use uv filter to protect your lens, ...
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Old 16-01-2008, 13:24   #1 (permalink)
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Filter's yes or no

There seem's to be 2 schools of thought on this one do you use uv filter to protect your lens, do they diminish quality...Ray
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Old 16-01-2008, 13:36   #2 (permalink)
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Re: Filter's yes or no

I think Methusaleh started this debate The majority will probably say they do keep a filter on but I'm afraid I only put one one when I need one.
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Old 16-01-2008, 13:40   #3 (permalink)
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Re: Filter's yes or no

Do you think they soften a image
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Old 16-01-2008, 13:49   #4 (permalink)
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Re: Filter's yes or no

I keep one on lenses that I use a lot and yes I do think they very slightly soften images and probably add to flare.
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Old 16-01-2008, 13:50   #5 (permalink)
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Re: Filter's yes or no

I have UV filters on my lenses, mainly as protection.
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Old 16-01-2008, 14:02   #6 (permalink)
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Re: Filter's yes or no

Any extra glass in front of the lens is bound to degrade the image to some extent, although whether you'd actually notice depends on the conditions.

The main problem is flare, as VinnyP mentioned, especially with a cheaper filter that isn't multicoated, and that could show up as reduced contrast or haze if the sun (what's that? ) is anywhere in front of you.

If a filter is knocked it may break, and the shards of glass are quite likely to scratch the lens. The front lens element itself is less likely to break, although it may mark or scratch if something hard bashes it.

In general, a lens hood gives better protection and also helps to improve the image rather than degrading it. I'd suggest that the main reason for using a protection filter is if you're in dusty conditions and there's a danger of grit putting small scratches on the lens when you clean it - a filter is cheaper to replace.

Not using a protection filter also makes it easier to fit creative filters - e.g. polarisers or graduated filters - because you don't have to remove the UV filter first. Stacking filters isn't really a good idea and may cause vignetting.

Some lenses (e.g. Canon 17-40L) need a filter to give full weather resistance, in which case it's best to go for a decent one like the Hoya Pro1 - but they cost a bit!

Just my 2p.
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Old 16-01-2008, 14:27   #7 (permalink)
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Re: Filter's yes or no

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Originally Posted by silkstone View Post
Any extra glass in front of the lens is bound to degrade the image to some extent, although whether you'd actually notice depends on the conditions.

The main problem is flare, as VinnyP mentioned, especially with a cheaper filter that isn't multicoated, and that could show up as reduced contrast or haze if the sun (what's that? ) is anywhere in front of you.

If a filter is knocked it may break, and the shards of glass are quite likely to scratch the lens. The front lens element itself is less likely to break, although it may mark or scratch if something hard bashes it.

In general, a lens hood gives better protection and also helps to improve the image rather than degrading it. I'd suggest that the main reason for using a protection filter is if you're in dusty conditions and there's a danger of grit putting small scratches on the lens when you clean it - a filter is cheaper to replace.

Not using a protection filter also makes it easier to fit creative filters - e.g. polarisers or graduated filters - because you don't have to remove the UV filter first. Stacking filters isn't really a good idea and may cause vignetting.

Some lenses (e.g. Canon 17-40L) need a filter to give full weather resistance, in which case it's best to go for a decent one like the Hoya Pro1 - but they cost a bit!

Just my 2p.
So do you use them silkstone, reason i ask is i have filters but have been advised no to use them, of course the guy who told me this is very careful with his gear and stressed to me to be careful as well, im thinking of not using them...Ray
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Old 16-01-2008, 16:01   #8 (permalink)
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Re: Filter's yes or no

This may be a case of 'do as I say, not as I do!'.

I often take photos in dusty conditions - construction sites - and I'm in the habit of cleaning off any debris with a (clean) cloth as I go, so in that situation yes, I do leave a filter on for protection. However, I managed to convince myself that it really can make a difference, especially if the sun shines on the lens, so usually these days I don't use a filter just for protection. I do try to use a lens hood, although some of the hoods for wide-angle lenses are awkward to carry around.
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Old 16-01-2008, 16:26   #9 (permalink)
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Re: Filter's yes or no

The only corollary to this is coatings and cleaning. NPS said at a workshop that they can easily tell what lenses have had filters and not when they come in for servicing as the coating gets worn off by cleaning. This will also degrade an image. I have no idea at which point, if any, one outweighs the other but that's my justification for using them on the main kit lenses. Fixation also said this but they like Nikon sell filters so MRDA. In all honesty the difference is tiny.

Some big lenses that have no front filter thread have a plain coated front element for weather proofing and protection so there may be somethinmg in it all.

Last edited by VinnyP; 16-01-2008 at 18:12.
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Old 16-01-2008, 16:55   #10 (permalink)
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Re: Filter's yes or no

I used to use UV filters but since I have updated my lenses they are all 77mm so I have only bought one UV which I almost never use. Recently I unintentionally left the UV filter and Polarizing filter on the front of my lens at a studio photoshoot. The pics were all ruined by flair and totally unusable. I could even see in the Camera display that the contrast was wrong but did not realise the problem until too late. I will only use a UV, if I feel that I am at a higher irsk than normal of damaging a lens. However, I have never scratched the front of a lens or filter in over 30 years of photography so it is an unlikely event.

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Old 16-01-2008, 18:41   #11 (permalink)
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Re: Filter's yes or no

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Originally Posted by stepheno View Post
I think Methusaleh started this debate The majority will probably say they do keep a filter on but I'm afraid I only put one one when I need one.
Same

I once dismantled a lens to see what was inside and then, like all men, decided to see how much work was needed to destroy the front element. I had to batter the thing full force with a screwdriver to get a scratch, so been much less precious about my kit ever since!
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Old 16-01-2008, 18:42   #12 (permalink)
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Re: Filter's yes or no

Thanks guys im not going to use filters from now on, i hope i dont regret this decision...Ray
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Old 16-01-2008, 18:44   #13 (permalink)
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Re: Filter's yes or no

All my lenses have UV filters on them apart from the 300mm and fisheye.
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Old 17-01-2008, 04:37   #14 (permalink)
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Re: Filter's yes or no

I used to put UV filters on my lens for protection. but I found some hoods like this one for my 50mm but made out of metal that IMO will protect it more than a lens if I ever drop it. found some for all the lens I bought that didn't have a hood. I still use the filters when its windy or im in a very dusty areas.
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Old 17-01-2008, 08:06   #15 (permalink)
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Re: Filter's yes or no

Ive just ordered a hood for the 10-22 from Park Cameras for 24-99...Ray
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Old 17-01-2008, 11:06   #16 (permalink)
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Re: Filter's yes or no

I keep a UV on each lens to protect from dust, smudges, scratches etc. Dust + smudges do seem to appear from nowhere, no matter how hard to you try to avoid them, so a UV does save wear + tear on lenses.

Only one of my UV's is scratched and that's the one I keep on my macro lens; the reason for the scratch is the ultra-thin feature of the filter, which has advantages, but the disadvantage is that it's tricky to replace the front (pinch-type) lens cap without scratching the filter At least I know the lens itself is protected, and the slight scratches don't appear to affect any shots, so the filter still works.

Ref hoods, they are the most cumbersome things + I don't use mine very much. I know they help with flare, but they're a pain to fit/remove/store. The lens manuals all say to store them fitted to the lens in reverse, but I'm always afraid of scratching the outside surface of the lens and/or that the hood may snap, so I don't store them that way, hence they take up extra space to carry in the bag ... hence they often get left at home.
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Old 17-01-2008, 12:22   #17 (permalink)
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Re: Filter's yes or no

Quote:
Originally Posted by Charlotte View Post
The lens manuals all say to store them fitted to the lens in reverse, but I'm always afraid of scratching the outside surface of the lens and/or that the hood may snap, so I don't store them that way, hence they take up extra space to carry in the bag ... hence they often get left at home.
Personally don't care if I scrape the outside of a lens or camera, but what I tend to do, as my storage box doesn't really cater for hoods very well, is stack them inside each other then put a little lens or whatever inside that, makes good use of available space.
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Old 17-01-2008, 17:25   #18 (permalink)
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Re: Filter's yes or no

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Same

I once dismantled a lens to see what was inside and then, like all men, decided to see how much work was needed to destroy the front element. I had to batter the thing full force with a screwdriver to get a scratch, so been much less precious about my kit ever since!
MB, please don't ask me to lend you one of my lenses!!!



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Old 17-01-2008, 18:38   #19 (permalink)
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Re: Filter's yes or no

In my defence it was already bust
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