After touting the virtues of the modern Sigma lens my work horse Sigma
17-50/2.8 started playing up last night during a fairly important
shoot. The zoom ring now sticks periodically at a point which makes it
difficult to use in the flurry of a stage event :( I bought a
17-70/2.8-4 to tide me over whilst the other is being repaired as
Pentax and Sigma lenses are handled by the same distributor here and
they are not know for their rush to repair gear.

On 8 March 2014 21:16, Boris Liberman <bori...@gmail.com> wrote:
> On 3/7/2014 11:43 PM, Paul Stenquist wrote:
>>
>> I bumped my DA* 60-250 when I took a spill last August. It was in a
>> soft lens case and there was no apparent damage, but the next time I
>> used it the images were soft in places. Did a brick wall test and
>> discovered that the focus field was no longer flat. Evidently, the
>> elements had been knocked out of alignment. Sent it to CRIS. They
>> told me it would have to go to Japan since they didn't have the right
>> tools to work on that lens. They said it would take about eight
>> weeks. I told them that worked for me since I could get by without it
>> until the auto show in January, at which point I would like to have
>> it. It came back to me in December. I repeated the brick wall test,
>> and while it was better, it was still a bit soft on the left side of
>> the frame. Sent my test pics to CRIS. They said sent the lens back to
>> us. I did; they tested as well and agreed with my finding. They then
>> contacted Japan. Japan said it was within spec. I disagreed
>> vehemently. With some help from Ricoh marketing, and pushing from
>> CRIS, Japan agreed to replace the lens. And Ricoh marketing loaned by
>> a 17-70 and 16-45 to tide me over. It took another eight weeks for
>> Pentax to send the replacement. Today, it faintly arrived, almost
>> exactly six months from the day I first sent the old lens in for
>> repair. But I'm very appreciative of the help from Ricoh and CRIS,
>> and I can't really fault Pentax. They replaced a lens that had been
>> damaged with a new one. Although I would think they should have been
>> able to repair the old one satisfactorily. Seems the 16-50 is not
>> only hard to assemble at the factory, it's tough to repair as well.
>> Tested the new one and set the fine focus adjustment. I'm now good to
>> go. So I shot a clock. Like many other clocks it's inscribed "Tempus
>> Fugit." Fugettaboutit.
>>
>> http://photo.net/photodb/photo?photo_id=17702140&size=lg
>>
>
> Paul, do I understand correctly, that you refer to DA* 16-50 although in the
> beginning of your message (fully quoted for your convenience :-) ), you
> mentioned DA* 60-250?
>
>
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-- 
Rob Studdert (Digital  Image Studio)
Tel: +61-418-166-870 UTC +10 Hours
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