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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

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  1. M

    K 100D and Sigma 170-500mm; HELP!

    Well, I am a little embarrassed to say it took me so long to identify the problem, but at least I did before sending it to sigma|:$| I have been getting by on using an eraser to clean the contacts on the lens. While doing so today I noticed that one of the screws on the mount was loose. I...
  2. M

    K 100D and Sigma 170-500mm; HELP!

    Yes I would say I did get the run around by a person on Ebay. The lens will not work on My K100D or my ZX-30 film camera. It is not contacting on the botton side of the contact ring. If you push/pull down the lens will work, so I know that is the problem. I only paid $390 for it on Ebay...
  3. M

    K 100D and Sigma 170-500mm; HELP!

    Well, I cleaned the contacts, and it didn't change. I decided to jiggle the lens like before, and got it to work again:t: Something isn't contacting right, but I may have found a quick fix to get me through the fall months. Thanks again for the help and ideas!! Matt
  4. M

    K 100D and Sigma 170-500mm; HELP!

    Yes, it was working, but then quit. The aperture ring is set on A, but I think the problem may be with the aperture ring. It started doing this a week or two ago, but if I jiggled the lens it would work. Now it just flashes Av -- constantly. I have contacted Sigma, but of course they just...
  5. M

    K 100D and Sigma 170-500mm; HELP!

    I bought a Sigma 170-500mm APO off of Ebay. It said that it was for a film camera, but I thought that it could be used on either. Anyways, I have had the camera and lens for a while now, but am still very naive to the dSLR game and the manual settings. I have taken quite a few photos, but...
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