Here are some other shots taken with it:
http://www.daytonphoto.com/PAW/angels_0350.htm - AF
http://www.daytonphoto.com/PAW/angels_0472a.htm - AF
http://www.daytonphoto.com/PAW/athletics_0235a.htm - AF
http://www.daytonphoto.com/PAW/bkd_5058.htm - Manual focus
http://www.daytonphoto.com/PAW/bkd_4635a.htm - AF
http://www.daytonphoto.com/PAW/bkd_4644a.htm - AF
http://www.daytonphoto.com/PAW/sfzoo_0248.htm - Manual focus
http://www.daytonphoto.com/PAW/sfzoo_0288a.htm - Manual focus
http://www.daytonphoto.com/PAW/giants_0112d.htm - Manual focus
http://www.daytonphoto.com/PAW/redsox_0302.htm - AF
http://www.daytonphoto.com/PAW/dodgers_0078.htm -AF
http://www.daytonphoto.com/PAW/redsox_0317.htm - AF
http://www.daytonphoto.com/PAW/norcalpdml_sf_140a.htm - AF with Sigma
1.4 EX converter

The optical quality is quite good - AF is normal for me - I've not
noticed any issues to speak of - it has been used with an *istD and
K10D.  As far as ruggedness goes, after the
first year, a screw came loose inside the zooming mechanism.  It had
to be sent in for repair.  I have used it for 3 seasons of little
league baseball action shooting.  The lens has been used for more
shots than all my other lenses combined - somewhere near 30,000
frames.  So it has been pretty good.  At the time I purchased it and
even today, there is not another choice in this range.  I needed
something with very good optical quality that could reach out to at
least 300mm and be constant at least to F4.

So I am happy with it and will continue to use it until it finally
dies.


-- 
Best regards,
Bruce


Wednesday, December 12, 2007, 1:13:46 PM, you wrote:

 
BJ> Bruce,

BJ> Looking at your baseball photo, I am impressed by the quality of the
BJ> Sigma lens.  I had heard rumours about flaky AF performance of this lens
BJ> with Pentax DSLRs...have you had any problems?  I have used the 70-200mm
BJ> EX with absolutely no problems and am intrigued by this lens.



BJ> Thanks,

BJ> James Burris
BJ> New member




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