Eagle BIFs and URGENT AF-S question to birders/tele shooters/trouble shooters!

Started Jan 30, 2013 | Discussions thread
OP windsprite Senior Member • Posts: 2,619
Re: Sample images

j_photo wrote:

No idea if this could be a factor, but many modern glazing units include coatings that selectively block or reflect certain wavelengths. Depending on the type of glass, either the UV or IR components of daylight could be significantly reduced coming through the glass. Maybe this change in mix of light frequencies is affecting focusing.

Have you tried putting a filter on the lens? Maybe that would help.

Hi.  Very interesting!  Yes, that's a possibility, and I believe our windows are UV coated.

I did try a good Kenko UV blocking filter against the lens yesterday, but it didn't make any difference.  I've been trying to think of other materials around the house that I can try.

BTW, I forgot to mention that the sample images are all 100% crops, if it wasn't obvious.


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