Hoping to get some insight. So I have these two old Canon film camera lenses that I have been using with my G5 and a Fotodiox adapter, and absolutely I love them. Anyway they have the hyper-focal scale printed on them, and with some intense experimentation (including a measuring tape) I have found them to be pretty much spot on. I have read posts on other sites that suggest you'd have to do math, or stop down on the scale for them to be right on a micro 4/3. I know there is a difference in "field of view" but the ACTUAL focal length is the same as on a film camera, you just see less. I don't think there is any difference in magnification, or is there? Again I have found my lenses work great simply reading the scale as printed. The depth of field is almost exactly what is printed on the barrel (and that is getting picky with a measuring tape). So what gives? BTW, I am not sure if it matters but I am using a Canon FD 28mm SC F2.8 and a Canon FD 50mm F1.8.