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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 13 Aug 2011 (Saturday) 07:21
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yankees3791
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Aug 13, 2011 07:21 |  #1

Hi,

I just bought a 17-40mm and was wondering what filters you guys recommend for it? I mostly will be taking landscape photos and want the darker effect for the sky so I didn't know if I needed a CPL, ND, etc. Any help would be appreciated!


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amfoto1
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Aug 13, 2011 08:14 |  #2

Get a good CPL... I use B+W Kaesemann and think they are among the best. Multi-coated Marumi, Hoya, Heliopan, Rodenstock and perhaps some others are good too. Main thing is to look for multi-coatedm, but good glass is important too. Won't be cheap. The better CPLs give the smoothest effects and don't cause tints in images. Cheap ones sometimes do.

If you want to use slower shutter speeds than your ISO and aperture will allow, such as to blur flowing water or surf, you might need an ND. Those come in various levels of stops.

17-40 isn't super wide on your 40D, so it's not likely you'll see problems with CPL on it. When a lens has an ultrawide angle of view, CPL can cause sky to look "blotchy" and uneven... just have to watch out for that. But probably don't need to be too concerned using it on 17mm and crop sensor camera.

Another common time a CPL can give problems is shooting sunsets or sunrises, directly toward a strong light source. It's a multi-layered filter, so even more more likely to flare in some way when there's a strong light source hitting it. Multi-coating helps resist this, and so can using a hood. But watch out for flare. Single layer filters can flare too... It's just increased possibility with multi-layered filter. Shooting into the light, a polarizer doesn't do much positive effect anyway. It's effect is strongest shooting 90 degrees from the sun.


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Aug 13, 2011 08:16 |  #3

ND darkens everything, not just the sky. Graduated ND goes from dark to light and can be used to darken sky if you have a reasonably flat horizon. A CPL will slightly darken the blue in the sky. If you need to darken the sky a lot relative to everything else, my preferred approach is exposure blending, not a filter. 2 or sometimes 3 shots, 2 stops apart, will generally do it.


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yankees3791
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Aug 13, 2011 08:21 |  #4

Hm it sounds like I may be needing both a CPL or ND. I was reading about the variable circular ND's that seem nice since you can just use one and turn it to get the effects of other NDs but they're so expensive!! I want to start with a nice set to give the photos a nice pop. Just have to find the most cost effective way to do so!


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windpig
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Aug 13, 2011 09:21 |  #5

For specifically what you stated the need, you will want a GND filter. You may want to look into one that can be adjusted vertically.

With filters, you get what you pay for. I would do a lot of searching here. This has been discussed a lot.


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