I would suggest that for my purposes, the weight is an advantage for stability with the greater mass. I use it for field sports and am reasonably stationary when set up with a good mono pod.
Very happy with it considering quality/price equation.
Low light AF is tricky for night games and am concerned about dust entry as the internal volume differential is sizable between min and max extensions. I would be leery in dusty conditions. (Just my bugaboo)
K20 and the Bigma.
Last edited by Phil1; 05-04-2012 at 12:48 PM.