Jos,
Here are few points that I find relevant:
1. The price/quality and price/reliability ratio of DA* 16-50 is high.
Although I am not terribly bothered by the soft corners at wider
apertures and wider focal lengths, it is a bit unpleasant to look at
wide shots Galia and I took in our most recent trip to USA only to see
softness where ideally it ought to be sharp...
2. I did not have any SDM troubles with my sample, *yet*. That is, I am
going to emphasize that specifically in my ad for it - no SDM issues
whatsoever, *yet*.
3. I might use a slightly longer reach for outdoor situations where
maximal aperture of f4.5 won't be that objectionable.
4. Yes, the HSM OS lens is better on the paper. However in terms of
mechanical longevity the fact that it has the whole optical group
designed to be movable is not something I'd appreciate.
5. I've just missed an opportunity to buy one such lens for USD 195
(plus shipping, taxes on my side, etc). So it is not very expensive.
I've been introduced to this lens by Jaume few years ago when we met
here. So I kind of know this lens and even then I remember I was quite
surprised by it.
I hope my answer makes sense to you.
Boris
On 11/16/2012 10:11 PM, Jos from Holland wrote:
Hi Boris,
I wonder why you want the older one.
I have the older one. I am happy with it, but last week in the theatre,
I had to switch it to manual focus because of the screwdriver noise. The
HSM version would have been silent I guess.
At the other hand: I try to avoid HSM lenses for reliability reasons.
What are your arguments for wanting screwdriver and not HSM?
greetz, Jos
On 15-11-2012 6:09, Boris Liberman wrote:
Hi!
I'm looking for Sigma 17-70/2.8-4.5 (not the modern OS HSM version,
but the older one). I'm willing either to buy it or to trade it for my
DA* 16-50/2.8. In the case of trade some money would have to come
along with the Sigma lens.
Thanks.
Boris
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