Doctorbird Offline Upload & Sell: On
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PetKal wrote:
Db, that's a very good start , particularly with an 800mm combo which, BTW, I would use, as well as 800L, for BIF only if I am truly desperate.
(As a side note, the longest combo I'd use for planned BIF would be 700mm (i.e. 500 f/4 + 1.4xTC MkIII). Naturally, 600 II (bare) and 400 II + 1.4xTC are also very good BIF tools.)
Appreciate your comments Peter. Please elaborate however - why is 800mm taboo for BIF?
I had the 2X rigged because the birds I initially intended to photograph were perched a good 200 - 300 ft away and to get physically closer would require a disallowed floating craft of some sort. There were however an unexpected but welcomed amount of fly-bys, many a bit closer than the perchers. So they got photographed with the 2X combo.
I though the AF system worked quite well, at least as good as my previous 7D/400 f/5.6 setup (although not a fair judge considering the disparity in cost and weight!). That is, both with regards to AF speed and accuracy.
Here are a few more from that day.
Db

Tracking and isolation from background was good. 200 ft away so major crop. Canon EOS-1D X 800 mm f/8.0 1/3200 sec 800 ISO 0.0 EV

Big slow birds in a flock. This was easy! Canon EOS-1D X 800 mm f/8.0 1/6400 sec 1600 ISO 0.0 EV

About 250-300 ft away. I waited to no avail for a fish catch. Canon EOS-1D X 800 mm f/8.0 1/5000 sec 1600 ISO 0.0 EV

Another easy slow flyer. Canon EOS-1D X 800 mm f/8.0 1/8000 sec 1600 ISO 0.0 EV
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