Above: From Top to Bottom: DA560, FA250-600, Sigma DC500, FA400.
There is also a A600 as well (the lower one):-
From these PFC posts (in Traditional Chinese):-
Who said Pentax is not for Birding after all?! ;-)
Saturday, March 02, 2013
The Pentax Big Guns for Birding!
Collection|Full Frame|Image Quality|K-5|K-5II/s|Lenses|People|Photos|