I recently bought a Mamiya 65mm f/6.3 lens. I've seen a few brief messages online that said it can be "easily" modded to open up to f/4, but I don't know how to do this.
I just got it back from repair at Nippon camera in NYC, and I asked the technician if he could do this mod, and he shook his head — "Don't do it." It could get stuck in the open position, he claimed. But sometimes those guys just don't want to rock the boat; I've seen it mentioned in several posts that you can indeed remove a plastic tab to get it to open to f/4. I realize the quality won't be great opened up, but that doesn't bother me — I need the extra speed.
Anyone have any experience/tips doing this?
Thanks.