Severin Barenbold

Hello all, So a buddy and I have been trying to figure out how an aperture of 0.7 is possible, as we thought that an aperture of 1.0 is theoretically 100% of the possible light... We think it has something to do with reflectors channeling additional light, but we dont really know. We did a little look through the forum to see if the question hasn't already been answered but didn't find anything, so apologies if this has been tackled before. Thanks. sevi