So, it is with some embarrassment that I ask this, but I'm having a lot of trouble removing my 90mm from its lens board.
I have been able to unscrew the back side of the lens, which I'd assumed would've let me be able to remove the lens, as with my others, however there's a retaining ring that I can't remove? Well in fact there are two, the inner most one unscrews, but because of the outer one, it cannot be removed.
Have photos:
I anyone could offer assistance, it would be great.
Thanks
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