Gelatin Filter - For Drop in 52mm f/2.8 300mm IS USM II

robert614 wrote:

tvstaff wrote:

robert614 wrote:

I use this drop in filter holder that excepts any threaded 52mm filter of your choice.Although you should make sure the filter is slim enough first.Though I found B+W f-pro filters work fine.So I don't think the filters need to be super slim.

http://www.bhphotovideo.com/c/product/763737-REG/Canon_4773B001_52mm_Drop_in_Gelatin_Filter.html

A little pricey,but I think it's a little less fiddly than cutting out my own filters.

Robert

Robert,

I'm shooting over water, want to keep contrast crisp and cut back on those blues and purples. Need to stay at 1/2500 with as low ISO as possible so sometimes I'm at 320 ISO.

So many choice in 52mm UV filters. I see some with rated UV values, Have you found better results with some vs. others?

Thank you

Tony

Tony,

I'm afraid I don't have much experience with UV filters.I usually use Neutral density filters in my lens.

I shoot a lot of motorsports.So when I when I take panning shots using very slow shutterspeeds in bright daylight,my aperture goes to like f22 and higher.Where diffraction starts creeping in.

The Neutral density filters allow me to keep my aperture in a much more optimal range.

I do use clear filters on my other lenses,just to protect the lens.I use B+W clear filters.But they don't filter any wavelengths of light.I will say I have always used B+W filters though.I don't have any experience with any other brands.

Here's a link that might be of interest to you.It's an old article where they test different UV filters.You probably have seen it before.

http://www.lenstip.com/113.4-article-UV_filters_test_Description_of_the_results_and_summary.html

you can click on the "test" highlighted in red in the far right column of each filter.

This will show you a visual graph of the wavelengths that each filter blocks out.

My guess is that of the two filters you're looking at,the UV 400 would probably filter more of the near UV blues and purples.The visible spectrum is from about 390nm to 700nm.Below 390nm is UV light.

All the filters have slightly different curves of the wavelengths they suppress.You probably want a filter that slightly dips into the visible spectrum to try and tame the near UV blues and purples.

Keep in mind I'm just hypothesizing here.I have absolutely no first hand experience with your problem,or if UV filters will help the situation.

Anyways,I hope this helps.

Good luck finding a solution to your problem.

Robert

Thank you Robert.  This was helpful I never read it before.  If anything it shows the lack of efficacy as I can't see the difference.  This is going to be by trial... hit and miss ROFL  Tony