FODSLR Red Metal Auto Focus Macro Extension Tube Set for Canon SLR Cameras Canon EF EF-S Lens

I bought this extension tube set to start getting into macro. My only complain is with one specific flaw which could be painfully costly, which is why I returned it. Given that I returned it, I'll start with the Con, which is only one but it weighted heavily in my evaluation given the potential issues it could cause to you, and (worst!) my equipment. Note that I didn't give it just a star because, although I won't risk it, you might still be able to fix the flaw yourself. But, in my case, I didn't like the design (or the production) of it.Con:The sole flaw I could find in my one-day evaluation revolved around the release latch and the pin. The extension tube didn't want to release the lens. Neither of them. Specifically, once you pulled the latch, all the way back, the lens would not rotate. I had to pull-push-wiggle-dance a bit in order to let it loose from my Canon 24-105mm object. I tried it with my nifty-50 (Canon 50mm F/1.8) with a slightly worst result. The problem was that I noticed the hole in which the pin latches on the lens, got noticeably altered. I could call it damaged, too, but it still latches to the camera. The pin from the extension tube scratched the outer perimeter of the hole enough to leave a dent. The Canon 50mm F/1.8's attaching plate is made of plastic (this isn't an "L" lens, they sell better ones with larger apertures, and more expensive). I think this is because the pin still protrudes a bit once it's fully depressed in the extension tube and it needed to create a cavity to allow the lens rotation for release. This fell so critical to me, because I like my equipment, and prefer to not damage it. Especially when it's something for which there are other extension tubes, paying a bit more, but possibly better. Needless to say, I returned it the next day.Pros:1. Lightweight! Yes, it's mostly plastic with the connection points in metal. However, the unit is solid. It didn't wobble or deflect when I had a Canon 24-105mm F/4 USM lens on it.2. Inexpensive. If you can find a way to grind the locking pin, then go for it. I rather not toy with it.3. It allows for auto focus and metering. Autofocus didn't work too well for me, but the metering did! Since I'm starting, I rather not guess on the exposure settings.Edit 02/06/2016:I bought another set of extension tubes,  Movo Photo AF Macro Extension Tube Set for Canon EOS DSLR Camera with 12mm, 20mm & 36mm Tubes (Metal Mount) . As suspected, the FODSLR Red extension tubes have a faulty design. The Movo extension tubes pull back flush with the rim of the tubes. Because of this I have no issues removing the lenses. The Movo are a bit more expensive, I paid a bit more than twice as much. However, considering that I wouldn't damage my equipment with the Movo, it's worth it. The only downside, if any, is that it moves a bit. However, this doesn't harm the quality of the image. It only does so by force (say, you're using a zoom lens, and keep going after you've reached the maximum extension).Happy shooting!!

These extension tubes are what I needed. They certainly work - I can function as close as about 5 inches using all 3 tubes at 75mm, allowing for some lovely VERY macro shots. It is hard to focus since the range of acceptable distances is SO small. I gave up on using AF since it is not usually able to find acceptable focus. It's easier to manually focus by adjusting the distance between the lens and the subject until acceptable focus is achieved. It's obviously quite difficult to get the focus right this way without a tripod, particularly with a 75-300mm lens with an extra 4 inches of length added...but they do work as described. For people who say their lenses don't focus with these - many probably are using a short focal length, which can in fact prevent focus...but on the correct lenses these tubes work great.About the build quality: less than desirable. I mean, these aren't going to break if you drop on them, certainly - they're sturdy. But I would be wary about using a heavy telephoto with these and not constantly supporting the lens. My other complaint about build quality is that they sound very scratchy when putting together and taking apart - especially when I try to attach it to my camera. This is made worse by the fact that it's extremely difficult to attach these quickly - it takes a lot of fiddling around and wiggling to get them to click. But once they do connect, there is solid tactile evidence that they are connected.For $20, well worth it for the applications in macro photography. But be wary of using these with very expensive lenses or very heavy lenses (or both!). If you plan to use heavy telephotos, spend some more money on sturdier tubes and save the cost of replacing your lens.

I received it yesterday, shot a few quick photos. It seems to work fine. I used it with my Canon T5 with a 75-300 EF lens. with all 3 tubes. With a 130mm the focus distance is about 18 inches. The tubes are plastic with metal ends. Though very light, seems fine, I expect don't you can abuse it though. It latches fine to camera and lens. (note: When I first tried to separate the tubes, I coouldn't, the release lever would not move. I ended up gently trying to turn them the opposit direction then the release worked, I think the smal pin it moves in the mount binds. I has not done that since the first time I separated them. The electrical connections work. Auto focus works, but will tend to hunt, the focal depth is very small. I used it on a sliding rail, at F36, manual focus, then move the rail to get the point I wanted. I will post some pictures, an orchid, 130mm f36, the lighting is sun from the side through a window, and a very bright LED flashlight handheld from just above the camera.1/13 sec exposure. Just a note you require a lot of light to use the tubes especially with a high f-stop and or longer tube lengths. This would be true with a $19 or $190 tube. you are effectively zooming into the middle of the image, as most of the image will be projected outside of your camera sensor, there is not must light for the sensor to use. The good thing about the tube is there is no lenses to add distortion or absorb light. The tube really only needs to hold the lens perpendicular to the camera and not allow movement. The electrical connection is required (and worked) to set the f-stop. I used the auto focus to set a crude focus, then set to manual and adjusted it the way I wanted. The dof is so low, the autofocus tends to hunt back and forth with any movement. This is a function of the lens, zoom, and distance to the subject, not the tube itself.