Canon EF 50mm f/1.2L USM converted to SA mount!!!!

Started Aug 13, 2007 | Discussions thread
OP Daiver Regular Member • Posts: 130
Re: Manual focus?

DaSigmaGuy wrote:

The rear element of my Canon FL 55mm f1.2 is 40mm, 2mm bigger than
rear element of the Canon EF 50mm f1.2 and it still fits inside an SA
mounting plate with at least 2mm to spare all round, as long as you
remove the three internal bezal ring mounting lugs of course.

Sorry, little my mistake. I am went to home and measure with my callipers.
The rear element of Canon 50 1.2 is around 37mm. Not 38.

The maximum diameter inside sigma mount is 43 mm. Inside canon 48.6 mm. Canon is bigger, and it is easy to do modifications.

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