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I used the B + W 72mm UV Protection Filter (010) for Camera Lens - Xtra Slim Mount (XS-PRO), MRC Nano, 16 Layers Multi-Resistant and Nano Coating, Photography Filter, 72 mm, Clear Protector with the A9 and 70-300 mm lens at 300 mm, f/8, and available ceiling LED lighting. See test below. It doesn't look like the filter affected the resolution. Perhaps the photo with the filter is slightly better. The photos were untouched. Only reduced file size for posting.

The photo on the left was with the filter. The photo on the right was without the filter.


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It's only "controversial" to people who want it to be controversial.  To people like yourself, and myself -- who have test results -- it's not.  That's like saying the COVID vaccine is controversial.  It only is to the people who choose to put their lives at risk!

I have UV filters on all of my lenses -- not just to reduce UV light (which is a bigger deal for film than digital sensors) but to protect my lens glass.

Thanks for your test results, anyway!

Edited by XKAES
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