jjl

Thanks for the replies & info. I hadn't heard about the 600 DO rumors... Hmm... It'd be typical timing for me to get the 600 and then the DO comes out a few weeks later. I've been through that ...

That's kind of what I was thinking - when considering range, longer is almost always better. I'll have this on a 7DMK2, though I do have a 5DM4 as well (which I use for most of my photography). ...

Thanks for the feedback & ideas. I have the 100-400 also, and I think I'll still bring that for backpacking trips or other times a really big lens is cumbersome. I'll probably keep the 400f4 DO as ...

Thanks for the quick reply! I know the 300mm f2.8 is a great lens, but I'm not really interested in it. I know I'd never use it at 300mm, so why not just get the 600 that I want. Anyway, appreciate ...

I'm in the market for one of these lenses, and looking for feedback from people who have one or both, and perhaps wish they had the other one. I'm just looking for insights that I might not have ...