Filter question - UV or CPL?

S

SinJinQLB

Member
Does anyone stack filters? I tried stacking two filters on to the DVX100a - a UV filter and a CPL filter. After filming a bunch of scenes with this setup I realized part of the rim on the top filter is exposed in the scene - I'm guessing because with both filters on they extend into the angle of vision. Does this always happen or does it depend on the size of the filters?

Also, since it seems I have to choose one filter to leave on, would it be best to keep the UV filter on or the CPL filter? From what I've read the UV filter helps bring out blue skies? And the CPL filter reduces reflection and brings out saturation in colors. I would rather have better saturation with the CPL but from what I've read, keeping the UV filter on seems standard.

I would like to hear other peoples opinions on this. Thanks.
 
The filters are always going to be the same size if you don't have some other thing it's attached to, so that'll always happen if your shooting totally wide. And extra glass layers may eventually increase flare.

But I'm not sure why you need the filters. UV filters are only effective in situations with a lot of light causing haze, otherwise they do nothing; which is why people leave them on, to protect the lens without causing optical changes. The most I've seen it change is on the ocean midday. Polarizing filters tend to be effective for haze, flares and, with their most common use, reflections. Using it or not depends on if you need those elements. If some of the reflected/hazy light is blocked off in outdoor scenes you might get better saturation, but not in most indoor situations. It will hide reflections on water, in windows, things like that. It's not something I'd keep on as a permanent addition to the lens because it does have heavy optical properties.
 
Ah ok. Thanks for the info. I actually have been doing a lot of filming outdoors which is why I thought I might need these filters. Let me ask you this - is it better to increase the saturation in post, or to try and do it through the use of filters during production?
 
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