43mm X4 UV Filter for Camera Lenses - UV Protection Photography Filter with Lens Cloth - MRC16, Schott B270, Nano Coatings, Ultra-Slim, Weather-Sealed by Breakthrough Photography

Absolutely awesome. I had a very close look and couldn't find a single fault with it. Glass needed no wiping or cleaning and was ready to go straight onto the lens. I see absolutely no degradation in image quality or loss of light. Prefect, exactly what I was looking for.

These are some of the best filters out there. Even after shooting professionally for the past 12 years, I used to just use cheap filters since I considered them as disposable wear and tear items. UV filters are typically used as lens element protectors, meaning that if you bang the front of your lens against something by accident it will theoretically protect the front of the lens from major damage. I was convinced by a local shop owner to try these out, as they have several features that cheaper filters don't have. These filters feature brass rings painted black and are very easy to thread on and off thanks to the knurled design to enhance grip. The glass used I believe is Schott glass, which is optically clear and distortion free, as well as having little to no effect on color cast. The filter is also multi coated, and thanks to this proprietary coating, is far easier to wipe clean of finger prints, oils, and salt spray compared to other premium filters I have tried. This filter costs a bit more, but if you shoot outdoors a lot or are frustrated with not being able to wipe the lens clean quickly, totally worth it!

Excellent quality

Used on my 55-70mm and fits nicely. Feels like good quality. I’ve had it for awhile now and have no complaints

Breakthrough is my go-to for any and all lens filters. Excellent clarity and sleek filter design.

I could not be more happy with this camera filter! It has adequate knurling to enable removal and I have sensed no tendency to 'stick' in place. My photos look brighter and colorful than my older V_____R brand filters. These filters get great reviews in the trade magazines.Highly recommended.

I purchased two X2 67 mm UV lens in the past few months to protect my new and expensive Canon nano USM lenses, but since I just bought the Canon EF 100mm f/2.8L MACRO lens, I decided to get the X4 UV 67mm instead of the X2.All I can say is WOW! You definitely get what you pay for! The X2 filters are very nice, but this is a giant step up.Feels nice and strong, very sturdy. Has a little bit of weight, but thats to be expected from premium filters. You will not be disappointed and with a 25 year guarantee you cannot go wrong. I am very happy I spent the extra money for the X4.From now on, all of my filters will be from Breakthrough.UPDATE: Just purchased the 72mm X4 for my new Canon EF 70-200mm IS II USM lens. The best lenses need the best filter - the X4 is fantastic as always! After purchasing 2 X2 UV filters and 2 X4 UV filters I will keep coming back again and again!UPDATE #2: Just purchased the 77mm X4 for my new Canon RF 24-105mm F/4L IS USM lens - fits perfectly as always and does not interfere with the lens or picture quality what so ever (either photo or video) - I am sure there will be an update 3 in the future :)

Just bought one of the 10-Stop filters.With an exposure difference of 1/80 vs 20” (slightly more than 10 stops?) the results were nearly indistinguishable from each other.Very sharp, no loss of contrast, and no decreeable difference in color cast.When measured, there was a 0.1% -- 0.2% difference in color. But that could certainly be explained by slight lighting change in the room or being off by a pixel where metering.I would whole heartedly suggest these filters to anyone looking to get some. I was surprised how good they were and the advertising claims were not over-hyped.FYI,I did buy one of those cheap $30 ND filter packs off Amazon a while back to play with.I figured a color cast would be no big deal for what I want to do.But not only was there a huge nearly unfixable color cast when stacking to get 10 stops, the loss of contrast and of sharpness was completely unacceptable.I would say, for the price that using a single filter from this pack was mostly acceptable to get your toe in the water and see if you’d make use of more expensive filters.Truly not useable for anything worthwhile.I’ll do some better testing with these, and try to put up a comparison within a controlled studio environment. It is an amazing difference.