I do have a question for you, how do you like the 400 on the 50? I
just sold my 100-400 (hope this is not a mistake) and bought the 400
5.6 so I have a better lens for BIF. I did have the 400 before the
100-400 and I couldn't get a decent shot now that I have learned more
about MA I feel it should help if this lens is not up to snuff
I think the 400mm f/5.6L is a wonderful lens and makes for a very
good wildlife lens when coupled with the cropping ability and
resolution of the 50D. It generally has faster AF and is a little
sharper than the 100-400 (especially at 400mm). It is also a little
lighter and less cumbersome as you know.
Given the terrible weather here, I havent been able to photograph
many BIF at all, so I havent used AI Servo mode much. But from the
limited experience I have had thus far, the AF is very fast and you
have no troubles locking onto your bird. If only the rain would clear
up so I can go out and practice.
I havent had the chance to MA the lens yet, it's been pouring with
rain here for over a month, so overcast days arent the best of days
for adjusting the focus on a lens. I do get the odd photo which isnt
sharp, but that is mainly my fault. The ones that are sharp could be
a little sharper, but once I alter the focus adjustment on the lens,
all will be fine; plus I can sharpen in PP anyway. The photo in my
siggie of the chestnut-breasted mannikin is a 100% crop using the 400
prime on my 50D. Unfortunately I dont have any good BIF to show you,
but I have seen some great ones on this forum with the 400mm.
--
Cheers,
Dale
'I stand to be, and usually am, corrected'
http://www.flickr.com/photos/29394895@N06/