Adam Maas wrote on 04.10.05 14:39: > Ring-type in-lens motors (USM/AF-S Ring-type) are faster, in all but the > lightest lenses. You can easily verify this with a Nikon body like the > D70 or F80, by switching between say a 28-105 (Body-driven) and a 24-120 > AF-S. The speed differences are quite notable on anything except a light > prime (Where even Canon doesn't always use USM, or occasionally uses > micro-motor USM, which is not faster than a good in-body motor). Combine > this with a more sensitive AF unit and better AF code and you have an > even bigger gap. It all depends on used body. D70 and F80 have weak built-in motors. On F100 or F5 (whoch I tried) AF with Nikkor 80-200/2.8 ED N is as fast as with AF-S 80-200/2.8 ED, and these are not light lenses.
> My experience is that the AF unit and motor in the D70 is generally > inferior to the SAFOX VIII, except in very low light and focus tracking. > The 4 outer poiints in the Multi-CAM900 are thoroughly useless, while > all but the two outermost in the SAFOX VIII are usable in most situations. Yup, if only Pentax could do something to improve low light focusing with Safox VIII, it would be one of the best AF systems around... Let's hope for this improvement in the upcoming *istD successor! -- Balance is the ultimate good... Best Regards Sylwek
