LOLID said:- A bit short on a FF for tiny insect macro. By the way, to remedy this, could someone tell me what would be better a (series of) Tube(s) or an Extender x1.4 or x2 ?
Get the Kenko extender, works great though afaik has issues with afma on 6d/5d3 (check if kenko has updated the fw).
LOLID said:- Autofocus seems a bit slow. But maybe I have a bad copy.
Af is slow, this is a macro lens dual-usable for portraits, in this order.
LOLID said:And lately I have noticed I have an unsual low rate of keeper. Focus misses the mark - nothing is in sharp focus not only at 2.8 but even till 7.1
Try to determine if lens sharpness of the af system is the issue by shooting a chart with mf or contrast af. The 100L should be sharp even wide open, though this is nearly useless for macro b/c of the small dof.
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