----- Original Message ----- From: Caveman Subject: Aperture coupling was Re: Exposure
> I just wonder... do they put "electronic" apertures in these new lenses > (some LCD screens) or are the apertures still mechanic ? How about > erratic electric contacts ? Could they also produce errors ? The norm now is a motor driven aperture. The camera tells the lens what f/stop it wants, and the lens goes to it. They either work, or they don't, and will give repeatable aperture sizes to very close tolerances. William Robb
