Originally posted by demp10 Works, sort of.
The lens will communicate min and max f-stop information and the camera will show the f-stop and allow to set it via the camera. It will also be included in the EXIF data. You will be able to use all the other camera modes (Tv, TVa, P, Sv), P-TTL flash, and pattern metering.
The problem is that all exposures except the extreme open and closed, will be off, sometimes more than one stop so you'll have to compensate in different amounts for every f-stop.
The reason being that all manual aperture lenses have their aperture lever moving proportionally to the diameter of the aperture while the A, F, FA and DA move proportionally to the area of the aperture.
Ah ha !...Very logical and well written explanation...Thanks for that.
I believe I might attack one of my crappy lenses and try it out. That'll be fun.
Cheers