I tested the K&F Concept filters on a Canon EOS 5D Mark III with a Canon lens.
I am very satisfied.

The filters are very well made. They are delivered well packaged. It is also practical that you get them right away in a well-padded bag and can thus store them well protected in the photo backpack. So the filters can also get no scratches and you always have the filters of one size together.

Also supplied is a cleaning brush.

The filters are absolutely accurate fit. This is not self-evident for filters of this price category.
I received the filters on a test basis which has no influence on my rating.

Original photos

What more can I say, the Step Up Ring is 1A compatible with my Canon Eos 600D (see picture). It fits like a glove, the zoom can be adjusted perfectly and a polarizing filter can be screwed or clicked on. But does the metal material keep what it promises??? But for around €7 you can't complain :-)

Yes... it works perfectly with Canon EOS M cameras. I own Canon EOS M10 and use this adapter most of the time with Canon 50mm 1.8 lens. It is amazing. The autofocus is accurate and fast enough. If you own a Canon EOS M camera, I recommend you this adapter because it is much cheaper than Canon original and there is actually no difference between them. Everything works as it should. I love this adaptor. The best purchase I've made for my camera.

Great quality for its price! Used this lens on a Canon EOS RP with the official HF to EF adapter (no control ring) and it works flawlessly. The autofocus is finicky at times (rarely), but once you've locked in on your subject, it tracks it perfectly. For the price I paid I can say it's worth it! I wasn't willing to shell out more money for a Canon 35mm F2/F1.4 or the Sigma/Tamron variant, so I went with it in hopes of getting a good sample. Others mentioned they got bad glass, probably random luck.

Well, I'm new to photography, my camera is a used Canon EOS 450D and I was recommended at various workshops as a beginner to use a lens with a fixed focal length. So I first ordered the 50mm lens and was so excited that I also ordered the 35mm lens right away. In my opinion, both take really great pictures, so I give a clear recommendation to buy both lenses.

This lens is a MUST in photography. I myself am a beginner and take photos with a Canon EOS 1100D. The price/performance ratio is great and the pictures are really impressive. I can wholeheartedly recommend this lens! Super fast delivery with the express delivery I had the lens in my hands the very next day.

Canon 600D works great

Really unbeatable for the price and quality! Have or had a Canon eos 40d, fits exactly and took great pictures. Unfortunately, the camera has now given up the ghost but I can recommend the lens to every Canon owner