Stephen J. Krogh wrote (edited):
...Had I gotten too spoiled by Canons lenses? Who wouldn't They are hard to beat, especially the Canon 70-200 2.8 HSM. So I decided to get the Sigma from B&H. At least, assuming their rate of product turn-over, it would have the latest software version that would work with the 7, not that I have a 7 but I do want the New EOS TI (what a great travel body). I was very pleased with this lens' operation, very quiet and smooth focusing, no jerking from torque in the focusing. It just makes me wonder, how long do I have before mine starts to operate like the demo model from my LCS. Until then, I couldn't be happier with the overall performance. ---------------------------------------------------------------------------- --------- Steve, For the record, Canon's lenses use USM motors and Sigma uses HSM. Sigma HSM equipped lenses DO NOT require an upgrade to work on newer EOS bodies. Its the Sigma "non-HSM" lenses such as the 28-70mm F2.8 EX or the 105mm F2.8 EX Macro. I own the macro and its been upgraded twice. No problems. My HSM is original and works fine on all EOS bodies. As to your demo lens, was it an HSM? Sigma does have the same lens in non-HSM for other bodies. Peter K * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
