I agree, screw drive AF should be phased out (in lenses; the in-body AF motor is a necessity). I'd like(1) a new line of D FA Limiteds, with:
- excellent optics
- moderate apertures to keep weight, size and cost under check(2)
- AW or at least WR
- in-lens motors (PLM/DC)
KAF4 is fine with me.
Originally posted by lithedreamer Electronic aperture (like that in the 55-300 PLM) breaks compatibility, though.
It only breaks forward compatibility, i.e. of older bodies with newer lenses. That's unavoidable, if you want progress.
Backwards compatibility i.e. of newer bodies with older lenses is kept, and I see no reason why this would change
(1) Like as in: willing to pay for
(2) Check the other site, they just reviewed the Sigma 85mm f/1.4 - and it's really, really good optically. However... it weights over 1.1Kg and it's also large for an 85mm f/1.4.