Filters?
 

I've searched and I think I have my answer.
But there was never a direct answer where most agreed on.
So here are my questions.

1. Do filters cause images to be degraded?
2. Do filters cause effect on lights-change settings?(Ex sports shoting f/4 with filter, without filter could shoot f4.8)

When I'm talking about filters. I mean a clear filter.
I shoot Football, volleyball, and basketball in poorly lit areas(high schools).

I've always had a clear filter on my lens. Cause I thought you used that for safety to the lens.

1)All filters degrade.
2)Depending on the filter, ND will change the amount entering the camera, causing slower shutter speed. While a haze filter do not. CP-L also stop down the light.

The biggest drawback I can think of in your situation, is the likelihood of the filter picking up extraneous light from the area lighting, and causing flare. A high quality filter will not noticeably degrade your photos otherwise. If you pixel-peep, you will find some differences in some areas.
You will normally not see any change in exposure with a clear filter. Light transmission should be 95% or better, so the only time you may see any difference would be if the exposure setting was right on the edge. Even then you would have to take comparison shots under controlled conditions, and read the actual values with an exif reader to see the difference. Practically - no.

brian

Thanks for the answers.
I've been using a Hoya 77mm Skylight(1B) filter on my 80-200mm 2.8 nikon lens.
Just wanted to know what others thought about filters.

Hoya says the filter
"Reduces excessive bluishness that frequently occurs in outdoor color
photography, especially in open shade under a clear, blue sky. The
absorption peak is in the range which corresponds to the film’s green
spectrum. This means outstanding outdoor shots with superb color
balance and clarity under all conditions. Also keeps skin tones free
of colored reflections from nearby objects such as the shade of trees."

So if this is a daytime filter I guess it would cause problems in low light shooting.

It is a filter meant for use with film, which is much more sensitive to UV and blue light than is a digital sensor. The parts of the spectrum which it reduces are also not parts which are prevalent in indoor lighting, so it isn't going to have any effect at all for your stated use.

brian