vineyard Offline Upload & Sell: Off
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I was able to test two copies of the 100-200 against two copies of the 250, when I bought the 250. The zooms had much higher variation between them. One was pretty good, but still had to be stopped down at the longer end (from about 160) for optimal results, to f8 and even f11.
While both 250s I tested were extremely good wide open. I often photograph under dim or even dark conditions, so the optimal results at f4 were what made me chose the 250. If you don’t need that, and are happy to stop down for optimal results, the 100-200 is, of course, more flexible. I prefer the 250 by a pretty big margin though.
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