Fotodiox Canon EOS Macro Extension Tube Set for Extreme Close-Ups

This lens adaptor looks well machined and feels sturdy in my hand, but every breech-lock mount lens I put on it does not work correctly, more specifically, the aperture is not allowed to operate its full range – I can only seem to get it to go between wide open to about 50% closed, around f/8 or so depending of course on which lens I am using. I have three breech-lock mount lenses, two made by Sears, and the other made by Star-D (probably all made by Samyang) and they all act the same way. Upon further inspection, it appears that the breech-lock collar that is supposed to rotate around the mount on the camera only turns a little bit before it is synched down and will not rotate any more. If I really grip it, and force it to rotate just a little more, then I can get a little more range out of the aperture, but only a stop or two, never getting any where near f/22. Those three breech-lock mount lenses all work great on my AE-1 and the collar rotates a lot more when connected to that camera. I do have one Canon branded lens that is a bayonet mount and it works well with this adaptor, allowing full range of the aperture with no problems. The difference is that is doesn’t have the rotating collar to synch-lock the lens onto the camera’s body mount. My guess is that there is some machining tolerance that wasn’t set right when the adaptor was manufactured, probably only a couple thousandths of an inch, but enough nonetheless. I’m unhappy that this only seems to work correctly with bayonet mount lenses when the instructions state that it will work with that and breech-lock lenses. I haven’t seen anyone else anywhere mention this type of problem, maybe I just got a bad adaptor?

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Camera: Canon Rebel T6S Lenses tested: Canon 10-18 IS STM / Canon 18-55 IS STM / Canon 55-200 IS STM / Canon 18-135 IS STM (all with AF set on the lens) Results: Consistent behavior with all 4 lenses in bright day light, tripod mounted - Will not AF correctly in any mode (Green box, P,Av,TV,) the lens will attempt to AF and actually go beyond sharp AF point than then defocus and ...stop. Even if then manually focused at that point and reset to AF...it will travel the entire focus range and then DE-FOCUS before stopping. And it reports to the camera in Av mode an aperture of "00". Same report when in Tv or Manual. The contact pins are there but "nobody is home"

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When I purchased it I knew it would have limitation, and I was willing to accept these. It has no functionality, and requires that you know what youre doing --- I believe that with my 35+ years of photography I would fall into that category. The fist obstacle was that the bellow seemed not stay in the position I set it to ...... well after reading some other reviews I noticed that the set-screw was not attached .... it was somewhere in the plastic bag in which the bellow was delivered .... So, the manufacture removes the set screw so that the package can be 5mm smaller ..... sorry this is not acceptable. I used / tested the bellow with a Canon 80D with battery grip ..... well that did not work because of the size of the battery grip. So I inserted a macro extender between the cameras body and the bellow to increase the distance and allow the bellow to be connected to the body - after all that would just add more extension and thus give additional distance to the lens. I then tested the bellow with a few lenses: Canon EF-S 10-22mm f/3.5-4.5 USM, Tamron Auto Focus 18-270mm f/3.5-6.3 VC, Canon EF 100-400mm f/4.5-5.6L IS II and a Canon EF 180mm f3.5L Macro USM. While I was able to get pictures (in manual mode off course), the operation was very cumbersome --- and most importantly --- especially with the Canon lenses -- the lenses would come off way too easy of the bellow, as the bellows lens-side does not have any security lock. Normally the lens is connected to the body, or extender and in order to release the lens the release button needs to be pressed --- not with the bellow. Sorry, but Im not risking having a $1000 lens falling down just because this bellow is not having this STANDARD feature. Stay away from the this inferior product and dont waste your time.

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I would give it negative stars if I could. Do NOT purchase this adapter!!! I used it on my Canon Rebel T5i with old F-Mount Sigma lenses and it either got stuck to the camera or the lens each time I took it off. I ripped apart my hand trying to remove it. Since the mounts twist the opposite ways, the adapter twists with it so focusing and zooming are close to impossible. It took me over two hours trying different things to take it off my lens. If you are having the issue, you have to use tweezers to push down the little black lever. This was very poorly designed. Its 100% worth buying a better one for twice the cost. Dont ruin your lenses or your cameras with this!!!

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