I recently acquired a beautiful 8 1/2" Darlot lens. Everything is perfect about it but I'd love to have a faster aperture. The lens is pretty basic, one group at the front, one at the back, Waterhouse slit. But inside the lens, next to the slit is a strange flat ring that has about 2" opening. It looks like it's there to hold Waterhouse stops but it can potentially be easily removed making the lens from F4 to something around F2.7. So I'm wondering, is there any functionality for that ring at all and is it going to affect lens performance if I take it out? I don't think I'll be able to put it back in so trial and error isn't an option here.
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