A very fine Canon lens.
I've been a Canon user for over two decades and really like their glass quality and quality of buid. BUT! This time I tried using this very good lens on my Sony A7 ii....had to use an adaptor of course and really hoped to be able to wed the two successfully. Unfortunately it just did not work well. This is not the fault of the lens or the camera, it's just not a good idea to "blend" in all cases. I do a lot of hummingbird shooting and I need a lens that will focus RIGHT NOW. This combo did not allow that to happen. The Lens "hopped" back and forth from extreme close to moderately close every time I tried to take a shot so I had to give up on the idea and stick with Sony-to-Sony, probably for the best. I really hated to send this fine lens back...but that's the way it worked out. Frankly, if I were to decide to go back to a Canon camera, which I considered, I would have kept this lens over the one I sold, a 100-400 "L". (I am seeking to go lighter equipment-wise). My advise re. this lens, it's a top-of-the-line piece of equipment and if you can't afford an "L", or if, like me, you want to go lighter and still want top quality, this is the lens for you.
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