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Forum: Troubleshooting and Beginner Help
02-03-2016, 11:10 AM
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If the lens is on A (and is working), then the aperture permitted setting does not matter. When it is on A, it just like a lens with no aperture ring (except for the manual focus part). "Aperture ring permitted" means it is permitting the shutter to fire IF you take it off A (which should only be done in Manual mode on the body or it won't stop down).
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Forum: Troubleshooting and Beginner Help
02-03-2016, 09:42 AM
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No the red center line is the setting you are on. See the main picture here:
SMC Pentax-A 50mm F1.7 Reviews - A Prime Lenses - Pentax Lens Reviews & Lens Database
It is on the 'A' setting. You will have to hold down the little button to make the jump from 22 to A, then release the button, and it should be locked on A. (If the lens if not mounted on the camera, the aperture will now be very small, and should open and close snappily if you manually push and release the aperture lever on the mount. Once mounted, it will stay wide open at all times except for the actual shot or the use of a preview function.) And as long as you keep it on A, you never have to touch the aperture ring again ever.
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Forum: Troubleshooting and Beginner Help
02-03-2016, 09:05 AM
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Put the aperture ring on the 'A' setting (it will lock with the little button) and leave it there forever. Then it will work like any modern lens except without autofocus (and if shake reduction is on it will ask you the focal length).
If you take it off the 'A' setting, it becomes fully manual, like an earlier M-style with no contacts. See this:
https://www.pentaxforums.com/forums/54-pentax-lens-articles/110657-how-use-me...k-x-k-7-a.html
But there is rarely a reason to take it off 'A' for normal use...
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