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Originally Posted by JvL

Hi there,
First post here on the forums.

According to my istDL manual the 80-300 lens is compatible with my camera but I have trouble using it in any other mode except for M.

In Av mode it shoots but I have no control over the aperture setting. The aperture ring is set to A.

Anyone else had experience with non digital Pentax lenses and DX format SLRs?

Regards,
Jason

In your menus (can't remember where but it's there), there is a setting for "aperture ring" usage. Toggle it opposite what you have it set to now and see if that fixes your problem.

I"m not that familiar with the lens you are talking about. If it's a manual focus lens, you may only be able to use it in manual (M) mode. When the manual says it will "work" with your camera, that means it will fit on the camera but it may be limited in function usage, such as metering or auto focus, etc.

If this is the case, you just set to "M" and adjust the aperture using the lens ring and the exposure on the camera body.

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