On Oct 4, 2011, at 3:05 PM, Boris Liberman wrote:

> Hi!
> 
> Picked up the medium size (as opposed to little) bugger from the post office 
> today. Few immediate impressions:
> 
> 1. Sorry, Paul (Stenquist), SDM is slower than screw-driven AF. It is 
> completely silent (as in no sound that I can hear) but it is slower and under 
> few tungsten lamps it did hunt a bit.

Mine is faster than my FA 50 and FA 35. You probably got a bad one:-).

> 
> 2. Double cam lens barrel sucks. Totally does not inspire any confidence.
> 
> 3. 16 mm is wide in a way that I forgotten. This is good.
> 
> 4. Albeit slower than screw driven, AF is accurate. No issues with infinity 
> or close focus.
> 
> 5. Hood is solid, better than other hoods on other f2.8 zoom lenses I had or 
> have.
> 
> 6. IQ is there. Fully open it is fully useable.
> 
> A question. My sample has slightly uneven rotation of zoom ring whereas in 
> the middle (around 24-28 mm) it gets a bit harder to rotate. And when I 
> rotate it, it produces a strange sound, as if some kind of air is being 
> sucked or whatever. Am I right to assume that it has to do with WR mechanism 
> which makes this lens a bit more air tight than its non-WR counterparts?
> 
> All in all - it was a good purchase. I plan to make this lens my work-horse.
> 
> Boris
> 
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