New DSLR - Pentax K5
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09-11-10, 07:22 PM
Join Date: Sep 2010
Originally Posted by
You're too kind
If I do come across any ice-cream or swimming pool related passages that I am struggling with, you'll be my first port of call.
Bearing in mind what you said about the Tamron SP90, I just went and tried my screw focus driven one. Interestingly, less than a second from closest focus to infinity. Mind you, it can hunt like mad sometimes. Actually, I guess the truth of it is they are all screw driven, it's just that some lenses have the motor inside rather than outside.
I'm not surprised the older SP90 is quicker focussing than the new one that I have. I read too that the Tamron 28-75mm is exactly the same. The screw driven one is quicker than the motorized. For posed portraits and macro its a fine lens but, I rarely bother to use mine for anything other than that because its just too slow to focus.
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