Dirty dust

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NikonHaoleboy
NikonHaoleboy Senior Member • Posts: 1,267
Dirty dust
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In LensRentals.com's recent tear down of Canon's RF 70-200 2.8 IS lens, Roger Cicala comments about extending barrel zooms and dust issues.

"Before we start, though, let’s get the extending barrel discussion out of the way. Some of you HATE extending barrel lenses. That’s cool; don’t get one. Some of you like to call them dust pumps. That’s cool, too, although it’s incorrect. (We take care of over 20,000 lenses. The most common ‘dusters’ among current lenses all happen to be primes that don’t zoom at all.)

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Canon EOS 6D Canon EOS Rebel SL1 Canon EF 135mm F2L USM Canon EF 200mm f/2.8L II USM Canon TS-E 45mm f/2.8 +5 more
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