DPChallenge: A Digital Photography Contest You are not logged in. (log in or register) 
 

DPChallenge Forums >> Hardware and Software >> UV Filter ?
Pages:  
Showing posts 1 - 10 of 10, (reverse)
AuthorThread
 07/21/2007 03:42:39 PM · #1
Hi All,

I need a UV filter for my canon EFS 17-85mm lens,

I am going to away to hot european sunny weather and wondered what type I should go for......

I already have a HOYA 67mm PL-CIR which I think is very dark and sometimes it makes pics very tinted...(too tinted). Please can anyone tell me when I should use this filter?

With The PL-CIR do the job?

All help really appreciated

Tony

07/21/2007 03:45:08 PM · #2
if you rotate the CPL properly you can adjust it's affect from full to almost none. if you want deep blue skies the CPL is the way to go.


07/21/2007 04:30:36 PM · #3
Hi,

Thanks for the post........

Sorry I dont quite understand....are you saying that the cpl has a range of strengths from almost none to very strong , So I dont need to buy another filter.....? I ill be happy if this is true....:)

thanks
 07/21/2007 04:38:59 PM · #4
Tony, a circular polarizer and a UV filter have somewhat different functions. The CPL will increase the depth of blues in the sky,and can also minimise reflections, most notably in water. It doesn't work in the same way as a coloured filter, rather more like a pair of good quality sunglasses. It is most effective at about 90 degrees to the sun - you twist it until you get the strength of polarisation that you want. When the sun is at about 180 degrees to the lens you will get little noticeable result. Others can probably give a more erudite run down on the benefits of the two, but at least this provides a starting point for you.
 07/21/2007 05:40:53 PM · #5
and if you want a filter on the lens, and are going to be in a sunny location, the CPL will protect the lens while at the same time offering you options with how the image appears.

i wouldn't use it indoors under most circumstances.

why don't you play around with the one you have ?

ETA: you have to rotate the filter to see how it's effect changes the image.

Message edited by author 2007-07-21 17:43:32.
 07/21/2007 05:55:00 PM · #6
Sara / Soup-ster,

Thanks for your help....

Ok.....so I understand the role of the cpl....so this means I also need another more general UV filter as I wont be in blazing sun all day , the light will change as the day goes on and I also will be the shade of a city at times ......so could you recommend a more general uv filter for that?

Cheers and sorry these seem like real dumb ass questions but I am really new to this and have an opportunity I dont want to ruin...

Thanks :)

Message edited by author 2007-07-21 17:55:44.
 07/21/2007 06:06:43 PM · #7
a UV filter doesn't do anything more than protect the front lens element, and add a piece of crummy glass in front of the lens that serves little purpose. if you are going to buy a UV filter, buy the most expensive one you can find...

don't ever stack a CPL with a UV !

ETA - buy lens cleaner and some lens wipes.


Message edited by author 2007-07-21 18:08:44.
 07/21/2007 07:06:41 PM · #8
A UV filter is generally nothing more than a waste of money, no better than buying headlight fluid for your car.

A good one only makes sense if you are shooting in a windstorm where dirt and sand are pelting your lens.

In most cases, they do more to degrade your image than anything to improve it and do much less to protect the front element of your lens than a lens hood which you should use anyway.

Read here
 07/21/2007 08:05:20 PM · #9
A polariser is good for darkening skies and making the clouds stand out more, or cutting reflections (as already stated). I'll resize and post some comparative photos or the latter effect in a few minutes. However it does cut the amount of light coming into the camera, so you need slower shutter speeds or larger apertures. For this reason it certainly is not a good lens protector.
 07/21/2007 08:17:27 PM · #10
Comparitive images - two in one frame, showing the effect of a polariser in cutting glare, rather than reflections as I indicated earlier. It is the only comparison I have available at present, but shows one of the polariser's uses quite effectively:

Pages:  
Current Server Time: 12/31/2025 03:36:05 PM

Please log in or register to post to the forums.


Home - Challenges - Community - League - Photos - Cameras - Lenses - Learn - Help - Terms of Use - Privacy - Top ^
DPChallenge, and website content and design, Copyright © 2001-2025 Challenging Technologies, LLC.
All digital photo copyrights belong to the photographers and may not be used without permission.
Current Server Time: 12/31/2025 03:36:05 PM EST.