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Forum: Lens Clubs
02-27-2014, 04:19 PM
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Thanks to both of you. I will contact Adorama and/or CRIS when I got back to Phx. Other than the aperture issue, I really like the lens.
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Forum: Lens Clubs
02-27-2014, 02:40 PM
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I haven't contacted CRIS yet as I am on vacation and won't be back in Phx until Sat at the earliest. To the best of my knowledge, CRIS is an authorized service center for not only Pentax but also Sigma. As for warranty issues, the lens was purchased 6 weeks ago and has seen very little use (one day this week, and maybe once before that). At first I thought I had inadvertently changed the EV on the camera, using the lens during this week, I am 99% certain that the problem is the lens and not user error. I was hoping someone here might have had a similar issue or would be able to advise me. Again, many thanks for the responses.
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Forum: Lens Clubs
02-27-2014, 02:00 PM
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When the lens is off the camera, the aperture is closed; when I move the aperture lever it opens wide but remains in that position momentarily then slowly closes. Also, I purchased the lens approximately 6wks ago during ImagingUSA in Phx through Adorama, so I don't know if they will do an exchange. On the plus side, it is obviously under warranty and CRIS isn't terribly far for me to drive. Thanks for the replies.
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Forum: Lens Clubs
02-26-2014, 08:42 AM
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I recently purchased the 10-20/3.5. I haven't had a chance to really work the lens until this week while on vacation. I am noticing that it is over-exposing. Has anyone here had any problems with their lens doing the same? I used the lens almost all day yesterday, and it almost appears that the aperture is either somehow reversed where 3.5 is the smallest and as you move through the stops, the aperture opens wider, or the blades are stuck. I am confused, none of my other lenses have this type of problem and all meter perfectly on my K5IIs.
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