Need help getting Pentax Asahi lens to work please

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Michael Piziak
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Need help getting Pentax Asahi lens to work please
4 months ago

I got the Pentax Asahi 100mm f4 macro lens today. I put it on camera and switched to manual mode. I can see through the lens, but it's flashing "F" and won't let me take a photo.

What do I do to the camera settings to tell it to let me take photo ?

Additional info: I have the Pentax k-r

 Michael Piziak's gear list:Michael Piziak's gear list
Pentax smc DA 18-55mm F3.5-5.6 AL Pentax smc DA 55-300mm F4.0-5.8 ED +1 more
Pentax K-r
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