colinbm
16-08-2011, 2:19pm
Here is a link to a serious look at Sigma 300mm f2.8 prime and 500mm f4.5 prime for birding, & some truely amazing & inspirational Bird Photography.
http://forums.dpreview.com/forums/readflat.asp?forum=1027&message=39125917
http://www.flickr.com/photos/avianphotos
http://www.pbase.com/barryb/sigma500
Cheers
Col
http://forums.dpreview.com/forums/readflat.asp?forum=1027&message=39125917
http://www.flickr.com/photos/avianphotos
http://www.pbase.com/barryb/sigma500
Cheers
Col