http://petapixel.com/2013/11/01/review-sigma-120-300-f2-8-one-sexy-beast/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+PetaPixel+%28PetaPixel%29&utm_content=My+Yahoo
this is a very good lens and is very good for wildlife on a crop body. some are scared off by the talk that it is bad with tc's. i saw the test shots with the sigma tc's at tdp and they look horrible? i decided to buy the lens and experiment myself. from what i have found so far:
it is really good with the 1.4x kenko pro/promaster, sharp, good af, good all around
the kenko pro/promaster 2x is sharp but the colors are washed out and it overexposes by +1 ev fast af but inconstant
canon 2xiii has slightly slower but better accuracy and constancy af, better colors and contrast, same sharpness as kenko pro but performs better in real word shooting
i will try and do some comparison shots and post this weekend
this is a very good lens and is very good for wildlife on a crop body. some are scared off by the talk that it is bad with tc's. i saw the test shots with the sigma tc's at tdp and they look horrible? i decided to buy the lens and experiment myself. from what i have found so far:
it is really good with the 1.4x kenko pro/promaster, sharp, good af, good all around
the kenko pro/promaster 2x is sharp but the colors are washed out and it overexposes by +1 ev fast af but inconstant
canon 2xiii has slightly slower but better accuracy and constancy af, better colors and contrast, same sharpness as kenko pro but performs better in real word shooting
i will try and do some comparison shots and post this weekend