about new XF55/200: I've seen only now

Started May 23, 2013 | Discussions thread
actaswu New Member • Posts: 9
Re: about new XF55/200: I've seen only now

Although a metal barrel would have a better quality feel, it hasn't got the thermal stability of a polymer. A metallic inner tube may cause play or tighten up when temperature increases as its inertia is different from the outer barrel. (With primes this is less of an issue because the lens doesn't extend that much.)

And a good quality polymer such as Delrin is as or more expensive as metal.

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