Hi Frantisek,
I once tested the AF version in Nikon mount (I wanted to use
something better than the 35-70/3.3-4.5 I had at that time with
my F-70).
I'm pretty sure that the MF and the AF versions were the same.
I made some shot from the office where the seller worked, so
this is not a definitive word about it.
Anyway, wide open @28 there is a noticeable light fall-off in
the corners, corners that are not very sharp. Stopped down a
stop or two the lens seems good enough to substitute an average
prime lens. @70 the lens seemed good even wide open, although I
cannot swear on it (I can see if I can find the slides).
On an issue of Tutti Fotografi, the magazine that shows the best
MTF tests in Italy, the lens showed the same performance I had
experienced (it seemed a bit faster wide open than stated, say
2.6 instead of 2.8). The distorsion is well corrected for a fast
zoom lens, and certainly better than the most recent 28-70/2.8
EX (even the sharpness is better, especially in the corners
towards the wide end).
I am not able to say something about the build quality, although
I've had mixed experiences with other Sigma lenses.
If you shoot slides (and it's not your intention as I can see)
you'd notice a huge difference in terms of contrast (less) and
color rendition (a little colder) comparing the Sigma lenses
with the Pentax ones.
Hope this helps.
Gianfranco
canislupus <[EMAIL PROTECTED]> wrote:
> Hi all!
>
> I found this lens used for a nice price. It's the plastic,
manual
> focus version, propably one of the older ones. PK-A mount.
>
> Any experience with its build quality and reliability? Is it
rugged
> enough? I just sold a Tamron SP 35-105/2.8 as it was not much
rugged
> and not wide enough for me.
>
> And what about optical quality? Especially wide open...
anybody used
> it? What size prints are possible at wide open and stopped
down, at
> quality needed for expositions (=big prints from relatively
close). I
> do lots of B&W which I print myself at big sizes.
>
> I will of course test the lens myself, but would like to know
some
> opinions beforehand.
>
> Please respond directly to [EMAIL PROTECTED], I get it much
faster
> than from list via web. Thank you.
>
> Thanks a lot!
>
> Frantisek
__________________________________________________
Do You Yahoo!?
Make international calls for as low as $.04/minute with Yahoo! Messenger
http://phonecard.yahoo.com/
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .
