JJCZ Mount Auto Focus Macro Extension Tube Ring Set for Nikon Z50 II Z50II Zf Z8 Z9 Z30 Z fc Zfc Z6 III II Z6III Z6II Z7II Z5 Mirrorless Camera & Nikon Z Mount Lens, Great Tool for Macro Photography

I returned these extension tubes because they didn't fit my R5 body and RF lenses snugly. There was side-to-side looseness as demonstrated in the video. Also, if I put a heavy lens on, the tubes would separate slightly due to the weight of the lens - also seen in the video. The tubes themselves were metal and seemed to be well built, but the lens mounts seemed to be of a weaker chrome metal. Watch the video. I suppose if you are using a lighter lens it wouldn't make too much of a difference. And, I suppose the side-to-side looseness wouldn't matter too much either, but .... you get what you pay for.

The extension tubes slide on and off from themselves and the camera mount quite smoothly, but they do not fit any X-Mount lens properly. I tried three lenses and all three were almost impossible to get on and off. Once on, it seems to provide nice magnification and the auto focus and auto exposure worked as expected. When I tried to remove any lens from the tubes it was a full tour de force. Once finally off, I could see small metal shavings on the tube's xmount and on the lens itself. Do not recommend.

My biggest concern with these is the undue wear and tear it would cause on my camera and lens. There's too much scraping when coupling these -- not at all smooth like attaching my lens to my camera.The construction is relatively solid, but I'm not too happy about the plastic. They're hollow so there's a bit of flex when you squeeze the tubes. I noticed this when I was installing one for the first time.In the test shots, I had my camera set in my heavy duty tripod and was static for all my shots. The settings were 80mm and the aperture at 22 (I think that's right). Here's the breakdown of the sample shots:I. No extensionsII. 11mm extensionIII. 16mm extensionIV. Both extensionsAutofocus worked well in shots III and IV; not so well on shot II; and failed completely on shot I. Obviously these are static shots, but I did get tons of really sharp photos and videos when I removed it from it's static position.I'm a bit conflicted with these, but there are other brands with similar offerings at better prices so I'll be sending these back. Happy shopping!

there are built well but the one thing is that there is too much slop in the ring connection. You must be carefull to get them lined up perfectly so that the camera remains level and the connections to the lens/camera line up, otherwise you get lens errors. they need to put a little more precision in the design. that said they do work if you are careful. I have bought 2 of these to get closer for macro photos. By using all at one time adds to the problem if the slop in the connections...

In fairness, its not that hard to make these because they're just empty tubes with the wiring for the lens passed along. But I have the nikon z versions and they work ok. Little loose here and a little too tight there but overall they're not bad... I wish they were weather sealed though as my camera and lenses are weather sealed and I have been saved a few times by said sealing... which these don't have