got mine yesterday and said I would test performance with and without this filter. I have a vintage Minolta lens that was from my grandfather so it is very valuable to me and I wanted to avoid damaging it. As the title suggests, there is slight yellowing, vignettes, and a barely noticeable loss of sharpness that I can detect when viewing it on my computer screen, although the compressed images I've added may not fully show. Resolution of the original images. Let's break down what I found: The Yellowing - This filter has a slight yellow tint which makes sense, it's a UV filter so the shorter wavelength light might have trouble getting through. This isn't a problem for me as it can easily be adjusted and fixed in software after adding a little more blue, or this might get you better results in the field depending on your conditions The vignette - This is very easy though noticeable when looking at the same image with the filter on and off, again this is not a problem for me as it can be fixed or tweaked in software so that it is indistinguishable The sharpness loss - the sharpness loss is even at 400% barely noticeable, which is great. After that, if you just add 1 percent more sharpness, that's no problem for me. You have to view the photo at 200% resolution or higher to notice a loss, and even if you do see that, you have to look carefully. For what I paid for this filter, I'm happy to know that it doesn't affect my image in any way and that it acts as a shield, protecting my glass from scratches and dust. I will be adding more of these for my lenses and will not be forced to remove the filter to take a photo like I would with others. Great product, highly recommend!

Thin lip, strong threading, coating looks even. Using both of them on orion 2x54 objective lens. Can't see any CA or distortion. Coating resist to cheap cotton shirts. Both came with good packaging and QA/QC. Digital picture effectiveness is unknown though. I would see this working as a protective cap for an asahi 50 f1.4

I would buy again with confidence.

This is a good filter and they designed it with a well made edge, meaning for a slim filter, it feels very nice and secure on your fingers. The pits are deep enough for your fingers to twist the filter on to the lens. You can really feel it. Unfortunately I have to return two of them as they don’t work well with the Panasonic HC-V770 camcorder and the Panasonic lens hood. It’s so thin that there’s not enough thickness for the hood to stay on.

The UV filter has a high-quality and clean finish. I really like the blue-purple reflection and it really makes a difference. I didn't notice any changes in image quality, but there could be a slightly different, increased lens flare. If you like the look, you will be satisfied with the filter. In any case, I can recommend it as protection for the lens!

So glad that I bought this protective/UV lens. I feel much better about using my camcorder in my favorite environment, the sand. My other camera didn't have a protective lens, and the zoom mechanism finally got a sand particle in the wrong place and froze up the zoom. The lens ring is very thin and black. Looks like OEM when installed. The glass appears perfectly clear so I am guessing that nearly all of the visible light is getting through it.

The filter is crystal clear and the rare fingerprint wipes off effortlessly. The edge of the filter has just enough texture to allow your fingers to grip easily. So far (thankfully), no drops or anything to report on how it protects my lens.

It removed reflections and got a good rich color with no excess blue. The only problem is that the flower aperture lens hood causes vignettes when the filter is on!

I bought the tripod from the same manufacturer, then I saw that this manufacturer also offers UV filters, so I couldn't resist and got them right away. Easy to assemble, very stable and the pictures are just AMAZING!

This filter was purchased for a 12~60mm Panasonic lens mounted on an Olympus OM-D E-M5 MKII. It was difficult to screw on because the first thread was difficult to engage properly despite handling the notches milled on the ring. Thinking it had it fitted, it was unpacked when I took the sun visor off. It is therefore important to check that it is tight and fully screwed. Otherwise nothing to complain about, it protects the lens and filters the light

Purchased this product to protect my camera lens, plus to help remove unwanted UV effects. The glass filter is mounted in a thin black coated aluminum frame and does not take up much space on the camera and that feature is very good to me. The price for the UV Filter was reasonable and I will most likely purchase additional filters from this company.