Yesterday I decided to get out the Sigma 170-500mm lens. I haven't used it since I got the new camera and had always been disappointed by its apparent soft focus. I though I would see how it compared with results I have been getting from the Canon EF 70-200mm f/4L IS USM. I set things up on my most sturdy tripod as the Sigma is a long heavy beast. The results confirmed my earlier findings. I can often get sharper photos from small crops with the Canon lens.
Anyway here are some of the everyday visitors to the garden taken with the Sigma set at about 450mm most of the time:
Young Sparrows at the bird bath
Sparrow enjoying Elder berries
Greenfinch trying to keep its balance
The lighting conditions were not very kind as the Sun was often hidden behind cloud. I had upped the ISO to cope but even so I still found the results disappointing as the Sigma had had good reviews. Mine is second hand so maybe it is not in perfect condition optically. Also there is the difference in price to take in to consideration as the Canon lens cost an arm and a leg whereas the Sigma only needs an arm!
2 hours ago