One thing I noticed when I was using non HSM sigma lenses (I was using the 28-80 and 70-300) is that when it gets really cold, the focus gets really slow, and sort of seems like its stressing the motor (Thus I switched to manual focus). Haven't really heard of anyone else having this problem, mainly noticed this on a hike in the mountains when it was around -35 at least, including wind chill.
As far as batteries, I always keep at least one extra in a pants or shirt pocket, inside snow pants or coat, and when the one I'm using dies, switch them out, the first one warms up in my pocket and will work again when the second dies. That system works pretty well for me.
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Canon: 5D MK II, 2x7D, 15 fisheye, 16-35L II, 24-70L, 24-105L, 85L II, 24L II, 70-200 2.8L IS II, 100L macro, 400 DO, 4x580EX II, twin macro light, Sigma 12-24, Lensbaby composer, Tokina 10-17
Its ok to edit and repost my shots on DPS
My work can be found at www.jamesholleman.com
Last edited by JAHphoto; 10-23-2007 at 05:18 PM.
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