Does this have focus confirmation on Canon 5D3?
276865
Similar to an auto focus lens an audible beep can be heard once the lens has achieved focus. The option can become available once the beep is enabled in the camera menu. On the 5D3 the beep can be enabled or disabled on the function page # 1.
276866
Yes. I also suggest microadjusting the focus confirmation once you get the lens.
1750568
The Mitros will project a red grid for focus assist when used on-camera. I've used this with both a Canon Rebel and Canon 6D with good results.
1196037
Yes it will. The focus confirmation is 'okay' for photos. I ended up using live view to focus on still subjects with some of my older pentax lenses.
1995499
it should, it works on my 6d, not problems, but it will still need minor adjustments on the exact point of your focus, mine works fine
256730
No. I believe there a different one that does. Also from sony but much more expensive. Like my camera, your camera might have a zoom feature that will help you focus harply.
1788181
I don't have a 7D I have a 5D Mark iii. The remote switch acts just like the shutter button on the camera when I use it. Half press gives a beep only when focus lock has been achieved, full press and the shutter is activated, no beep at that time and it also locks for long or timed exposures. I have the lesser model too that I use with a 60D it does the same thing with no problems. You might check your setting for focus on the camera i.e. one shot, AI Focus, or AI Servo. My remotes seem to work great, use them all the time....if this doesn't help maybe try contacting canon.
739069
With newer 2012 + cameras yes. Still a bit buggy on my 7D. Works fine on my 5D3 and eos -M
1745491
Yes it does, that's the camera I have. It does have the motorized focus also. Excellent lens!
266375
None at all on my M- it is a bit slow in the focus- but when I combined it with a short loupe to act as a viewfinder it became handy. Mine works perfectly except for the focussing time. VRR
2212013
Yes - it does but I didn't have a chance to try out the telephoto lens until this weekend and I couldn't get it to auto focus. I haven't had a chance to research that yet. Great camera and accessories for the price.
1368095
Canon's webpage for the 5D mark III (http://www.usa.canon.com/cusa/consumer/products/cameras/slr_cameras/eos_5d_mark_iii#Specifications) states that this body works with EF lenses but not EF-S lenses. I guess the computer in the 5Dmk3 doesn't work with the image stabilization.
610119
There is NO internal/communication between the camera and lens that indicates when it is in focus. I am using it with a Canon 50d.
788334
It works as advertised for me on my Canon 70D. What do you mean by full functionality?
17384
http://snapsort.com/compare/Canon-EOS-5D-Mark-III-vs-Canon_EOS-1Ds_Mark_III
916339
Yes! I have both the 5D Mark III and EF 85 1.8. They're a great combo, I use the 85 1.8 often for portraits.
124328
I can't speak to the 70d specifically, but it works great on my Canon sl1, so still a crop sensor and digic5. I use it mostly as an astro lens and like it a lot from the couple of times I have used it.
2215158
Yes it should. I have used them very nicely on the canon 5d markI ... the functionality will be just the same on markIII. Keep in mind (max) higher magnification(all 3 on) means manual focus may be needed. But my results are they do the job.