Thinking about the latest thread on what lens for bird photography
without breaking the bank, I went out and did a quick field test.
Here is a 300/4 with 1.4x extender AND 2x extender for a total of 840mm
f11 equivalent. I used a Sigma flash with Kirk flash x-tender for a bit
of extra light. The bird was about 50 feet away and this is quite a
crop and resized for the web, etc, etc. (It's crappy composition; I hate
the looking-up-perspective, but it's a pretty bird: a Northern
"yellow-shafted" flicker (Colaptes auratus) a type of woodpecker common
around here).
http://ww2.xian.us:8080/flicker_IMG_4798.jpg
~200k
As a test I'm happy with the sharpness, color and lack of any obvious
lens artifacts. The combination of lens and 2 TCs was a bit difficult
to focus due to so much loss of light, but definitely doable.
--
Christian
http://photography.skofteland.net
