I picked up a used 200mm f/2.8 L that seems to work very well, but I think it needs a tripod collar for better stability. The Canon unit is quite expensive, of course.
I found this one online:
http://www.bhphotovideo.com/c/product/822975-REG/Vello_TC_AB_Tripod_Collar_A_Black.html
Has anyone tried one of these? Are there other alternatives to the Canon collar?
I found this one online:
http://www.bhphotovideo.com/c/product/822975-REG/Vello_TC_AB_Tripod_Collar_A_Black.html
Has anyone tried one of these? Are there other alternatives to the Canon collar?