Both of these are available locally. (for a bit more than skipwilliams's
averages say they should be costing, but once I add in shipping + duty it
seems more reasonable) and I'm tempted by a decent prime at that length.
Do people have preferences for one over the other? Checking on e-sif,
unsurprisingly the tradeoff is between weight/size and rather less than a
stop (I think) of speed -- if anyone has both, which do you find you use
more? Gary Reese's tests suggest that the f4 performs noticeably better than
the f5, interestingly.
thanks,
-- dan
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