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| p.1 #3 · Bought: Canon EF 500mm f4L IS or 400mm f4 DO IS or...? (Canada) |
I would strongly discourage using a 400 2.8 for wide life during a trip.
I would also discourage 400 DO. 300 2.8 plus teleconverter is a better solution. 400 do is a handholdable lens for sports but it doesn't meet the requirement for birds. If you are shooting hippos you'll be fine, if birds, it doesn't do a lot more than a 400 5.6, per sharpness. It's the only supertele whose sharpness is in the level of a 70-200. Both my personal experience and review from the-digital-pictures would support this conclusion.
for a time, the 400 do is cheaper that the 300...Show more →
Thanks for the advice, but I've owned all of the above lenses and know what my needs are, and the 300 f2.8 is not a consideration.