this is my first post, and only a week ago I bought Pentax K10D and a Sigma 70-300mm APO DG macro..
my experience is limited, but i already managed to take several great shots with it, in all focal lenghts:
Since i'm not used to post here, i will post my samples in several replies.
first i will post several samples of 70mm.
well i'm in trouble, i do not know how to add an image to this thread..
when i'll figure it out, i'll update
here's the update
all images are straight of the camera
four samples of 70mm:
this image is: shot in P mode f/7.1; iso100; 1/400; no exposure compensation;
next image is: shot in aperture priority f/11; iso1250; 1/80
next image is: shot in aperture priority f/4; iso200; 1/80
next image is: shot in Shutter priority f/9; iso100; 1/1250
these are not the best shots, but there is no argument that this lens has any difficulties in 70mm focal lenght so, in the next reply i'll move on to greater focal lenghts were i usualy shoot with this lens.