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RF 70-200 or EF 70-200 with Converter for EOS R

Started Jan 30, 2020 | Questions thread
Suave Senior Member • Posts: 2,289
Re: That tried and true "air pump" design

No video.  It was actually a lens that someone forgot outdoors.  It got wet and accumulated all sorts of dirt inside, but somehow the electronics survived.  Had to be disassebled completely.

Re: cleaning behind the front group.  I strongly believe that the only time it should be done is before the lens is sold.

 Suave's gear list:Suave's gear list
Nikon D7000 Canon EOS 5D Mark III Canon EOS RP Canon EF 85mm F1.8 USM Canon EF 24-70mm f/2.8L USM +7 more
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