I found this page that shows the GM1 with various lenses mounted to it. The shot of the Oly BCL say "with f/2 mod." http://www.ephotozine.com/article/panasonic-lumix-gm1-lens-examples-23397 I did some searching, on this forum and Google, and couldn't find any other mention of such a mod. Anyone have intel on this? The BCL is a pretty rad toy, but at f/8 it's sadly not suited to indoor shooting. Opening it up to f/2 (or even f/4) would make it a lot more versatile but the idea seems too good to be true.