don't limit yourself to the older adaptall lenses with the M-A aperture manual/auto iris switch....it's all hyperthetical once you put the EF/eos mount or adapter on anyway....the EF mount requires an electronic pulse to stop the iris down at photo taking time.
....tho I can see your point....quicker to move a lever than moving the aperture ring back to the desired aperture .....particularly at speed...
remember too that Pentax DSLR and Nikon DSLR still use the mechanical methods to operate the lenses apertures, so the same sort of problem wouldn't happen with Tamron's fitted with the correct mounts on their DSLR's, as we see on Canon's.......ah blast if only Canon had kept the old FD mount ba humbug...don't take me down that path! Have you seen how cheaply some quality FD fit optics go for....once saw a 300mm f2.8 go for less than £200.....imagine what it would've gone for had it been compatible with current canon kit!?
|