Macro Lens Extension Tube with Lens Body and Rear Cap for Canon EOS EF Canon1D 1Ds Series 7D 5D 5DMarkII 5DMark III etc Lens

Works as advertised. This allows you to get much closer to the subject while keeping focus. Autofocus works, after a fashion but most macro photography focus is accomplished by moving the camera as the point of focus is difficult for autofocus to resolve.The nice part about these rings is you retain full aperture control so DoF is fully adjustable while mounted to the rings. Most rings in this price range require you to preset the aperture, unmount the lens, mount the rings, and mount the lens to the rings. If you don't like the DoF, remove it all and reset.The rings themselves are plastic with metal mounting surfaces so some care should be taken when handling them. Again, you can't be too picky for the price. These are a great low cost way to start macro photography without breaking the bank and if you decide macro is for you, then you can invest in more expensive gear. If not, you're not out much and the experience will be well worth it.

So far, I've used this set only for digitizing film slides with my EOS Rebel T6i. I've used the 13 and 21 mm tubes (separately) with either a Canon EFS 18-55 mm or my old 28mm Pentax Takumar. Works pretty well, and I've had no problem with the EF or stabilizer functions. The connections between tube and body and tube and lens are pretty smooth, although the metal tabs on the tubes are not as easy to use as the big button on the camera body. It's actually the connections between adjacent tubes that are a little stiff. The metal tab on the tube closest to the camera body interferes slightly with the big lens release button on the camera body, but it's only a problem for the 13 mm tube and not a large problem even then.Since I've only used one tube at a time, I can't comment on the electrical integrity of 2 or all 3 stacked. I'll just say you should inspect the contacts closely when you open the package. Mine showed just a few small incursions of plastic over the edges of the gold on the back side of one tube. If your incursions are worse than mine, you could have trouble.They included an extra mating set of front and back covers, in addition to the set that was installed and included on the tube stack. Not expected, but useful, thanks, especially if you want to store the not-in-current-use tubes separately. The microfiber cloth seems nowadays to be a standard "extra" to throw in with any camera accessory purchase, but this one is particularly good, and all are handy. There is also a nice velvet drawstring. bag to keep the whole thing in. All very nice touches.All in all, it's a good set. Why not 5 stars? Because I still haven't tried extreme closeups with the full stack of 3, let alone a ring flash powered through the contacts. Stay tuned.***Update*** This evening I had occasion to use all 3 tubes to magnify a small portion of one of the slides I was digitizing. The connections worked fine to drive the EF function, although I can't say about the stabilization function since my SOP is to immobilize the camera relative to the subject in such cases. Additionally, the stacked unit felt solid and there was no hint that any of the 3 would wiggle loose. BTW the red rings, which comprise the engagement mechanisms and seating surfaces front and back, seem to be made of a good quality aircraft aluminum, definitely not plastic. The black tube material may be plastic, but could be carbon fiber material; I'm not sure.I still think I will withhold the last star until I have a little more experience.

I picked this set up for fun basically and as a means to expand my creative toolkit in photography. I popped one on, went outside and with 5 minutes of trial and error started to get some pretty cool shots. I couldn't ask for much more than that.They are well made and have worked perfectly with my Canon 60D camera. I've used them so far with my two Canon EF auto-focus lenses (a 24mm prime and a 50mm prime), but I intend to try out my larger collection of Rokinon primes too when I get the time. Taking these extenders either on or off posed no problem, and all the functionality (other than lens distortion correction) you'd normally get with just the lens was there.All in all, this set seriously seems like a bargain for the price. Though some of the inner components may be plastic, everything on the outside is anodized aluminium and very well constructed.

I'm using these on a Canon t7i and manually focusing. Both shorter tubes seem to work. When I put the 31mm on my camera, it will not turn on. It was an unpleasant feeling when the camera would not turn on even after removing the tube. I had to remove the battery from my camera to get it to turn back on.These are made from a combination of plastic and metal. They are rough, but the shorter 2 seem to work ok.Shame on me for waiting so long to try these or I would have returned them.

I love these extenders. I have a Canon T6i and this fits without any issues.As per operation, your lens will have a limitation of a total distance you can actually extend it. If the camera cannot focus, there are two things that may happen(which was quite odd)1. You may receive a false reading that your battery is dead.2. You will get a red error screen. This will let you know you have exceeded the maximum range for your lense.Since this is definitely after market, you have to find what combinations work with each lens, that will allow your camera to function properly.For sub-15 dollars, I cannot complain about build quality. It's steardy, and tight(but not too tight) fitting, and leaves you knowing that your equipment will not detatch.I say it's perfect for what I wanted it for. It hits the spot for quality/price ratio.