----- Original Message ----- From: "Bojidar Dimitrov" <[EMAIL PROTECTED]>
> > Canon EOS > ========= > > > + electronic aperture control: the aperture can be placed anywhere in > the lens, no mechanical coupling, very fast and precise Hi Boz, Can you enlight me on this claim, because I have repaired several Canon EOS lenses, and found that the aperture motor is a stepper motor. Stepper motors are not very fast motors, so I doubt that they are faster than a spring loaded aperture mechanism. Also the electronic motor takes room, and I admit that Canon lenses have lots of free space in their much too bulky barrels. This bulky barrel is probably the reason that these plastic lenses feel mechanical unexpected solid. And aperture mechanisms cannot be placed anywhere in the lens, because it is dictated by the optical design. There are very few lenses (except the older very long lenses) where apertures are placed at the optical wrong position. George P.S. already sold the 24-35 zoom ?
