I have only experienced the 55-300, but I have an old Sigma 70-300 which, while sharp, lacks contrast (it can be overcome to some extent through PP). However, this is probably not a fair comparison, and I imagine newer Sigmas are much better. All I can say is that I was very pleased with the sharpness I got from the 55-300 considering its price. It's also light, so it's a very good candidate for a two lens set-up for travelling.
I have attached a picture taken with this lens at its 300mm setting.
Last edited by Cynog Ap Brychan; 02-19-2013 at 11:40 AM.
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