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06-23-2007, 01:07 PM   #1
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using a Sears K Mount F4 80-200

I am having difficulty using this lens on my K100D. It hooks up fine but when I try to operate it, the F in the viewfinder blinks and the on button locks up.

What are the precedures to do in order for the lens to work. I did read the manual and checked a few web sites but am at a loss. I must be doing something wrong.


06-26-2007, 04:33 PM   #2
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It won't take a photo until the picture is perfectly in focus. Also the F flashes since the lens is not sending information regarding aperture and focal length back to the camera due to the lack of contacts that arises from the lens' age.
06-26-2007, 04:37 PM   #3
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QuoteOriginally posted by Bob Tuttle Quote
I am having difficulty using this lens on my K100D. It hooks up fine but when I try to operate it, the F in the viewfinder blinks and the on button locks up.

What are the precedures to do in order for the lens to work. I did read the manual and checked a few web sites but am at a loss. I must be doing something wrong.
Menu -> Custom Setting -> Using Aperture Ring -> Permitted

Menu -> Custom setting -> FI with S Lens -> Availiable

In order to use the lens, set the camera on Manual Mode. Focus and then turn the aperture ring to desired position. Press the "AE-L" button before you hit the shutter button. Pressing the button causes the camera to stop the lens down and take a light reading. (It then calculates the proper shutter speed to use).
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