Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Will this work with a 5D Mark II? Thank you.
Document: Great lens for the money. I do wildlife photography and this is a great  buy. I am using this on a Canon 1DS mark II camera and it work fine,
Its all in how you set your camera.I have tried two different converters and they work with the lens. They slow it down a bit but that is to be expected.
Just got this photo for my Pentax K10D. Works great in manual focus but I cannot get the auto focus to work?I can use it this way. I am assuming for the moment that the problem is the user.
They are straight out of my Canon 7D whichI use for Telephoto work. It's a great camera and serves me well for reach.There is no editing except to convert Raw to Jpg in LR 3. My images are robins, squirrels,sparrows and I may throw in a red wing black bird. The robin and squirrel are shotat 400MM Wide Open at f5.6, ISO 100.
Yes, it's a bit heavy, but not too heavy to shoot handheld, thanks to the image stabilization. The included tripod mount ring makes it an ideal combo for hiking when used with a monopod.I've fallen in love with using this lens for candid portraits: you can shoot from far enough away that your subject doesn't notice and "ham it up" or hide. It also is very nice for light macro work, since it focuses at about 60", even at the maximum zoom.
I got this lens largely because it was on sale and I was thinking it would be a nice addition. I ended up returning it because realistically I don't have much use for a lens in this range and would rather spend the money elsewhere at the moment.I did give it a thorough work out over a couple weekends and was quite impressed with it performance.The OS works flawlessly and I was able to snap some very detailed shots of grounded geese while walking toward them using it hand-held.
I love sports car racing and have been taking amateur photos with a standard 70-200mm Nikon zoom. I purchased the Sigma 120-400mm to get the shots I have always wanted to but could not get. Took it to Road Atlanta for the HRS races and got shots and angles that I would never believe possible. It's size is just right. Not too heavy but would recommend a monopod. Took me some time to get my camera settings to work with pan shots.
very nice lens pics shows no softness at the edges. the down side it is slighty heavier then the Nikon 80-400.  but the up side is it is lighter on the your wallet
just got the lens a week ago  ! did a photo shoot in an Airshow here in Dallas Area and the performance was great. picture is clear if I do my part ! I find it easier when I mount the lens on the monopod. I push the shutter speed right to 1200 and all pic came out good. lens is a bit heavy but managable. focusing is fast and I like the twist zoom over the Canon 100-400L.
You'll be rewarded with gorgeous, sharp images.- Build quality and materials are first-rate.I never thought I'd see the day I'd spend a grand for a non-Nikon lens, but I'm glad I didn't let my prejudice keep me from trying it. It's a superb lens at a fair price.
Answer: Yes