Doctorbird
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 Re: Hands-on: EF 200-400mm f/4L IS USM Extender 1.4X | |
At least we know from these preliminary results that the lens doesn\'t seem to be a slouch.
If the MTF characteristics are any indication, and they ought to be, it\'s predictable performance, at the center at least, is near not quite up to that of the super tele primes but as good or better than anything else. The lens also seems to be engineered for optimal performance towards the tele end.
This is just my theoretical meanderings regarding IQ. 
Db
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