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RF 35mm F1.8 IS STM Hood - EW-52 vs ES-52 for EF 40mm F2.8 STM

Started Jan 4, 2020 | Discussions thread
mtillitt New Member • Posts: 24
Re: RF 35mm F1.8 IS STM Hood - EW-52 vs ES-52 for EF 40mm F2.8 STM

The o ring goes in the little groove around the front of the main barrel.  I think I used about 3/32 x 2 inch diameter. If you use 3/32 size, going to a larger overall diameter will make it stretch  less and be a tighter fit for the hood. It may take a little  trial and error to get just the right fit.  Mine is pretty snug to take off but it won't get bumped off either.  Only bummer is the overall diameter of the hood isn't large enough to reverse over the lens. The one in the picture is the ES-65. EW-65 is a little shorter. Neither vignettes.

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