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04-12-2019, 09:25 AM   #1
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Join Date: Apr 2019
Posts: 7
Problem with SMC Pentax-A 645 Zoom 1:4.5 80-160


I received the lens in mint condition as a used one from Japan. The lens looks perfect but I could not turn the zoom ring since its fixed at the 120mm position. I also have not found a switch at the side of the lens to release the zoom
function and I wonder what needs to be done to unlock the zoom. I want to use this fine lens with an adapter on my FUJI GFX and hope that somebody experienced with that type of lens could provide some help?

Thanks in advance


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04-20-2019, 01:29 PM   #2
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Join Date: Oct 2018
Location: Quebec City, Quebec
Posts: 2,114
There is no locking mechanism on the zoom ring. It should turn freely. Try to unstick it gently, otherwise have it inspected by a reputable repairman. These lenses are very well-built and should last a lifetime. Surprising how cheaply you can buy these very sharp and useful lenses second-hand on eBay.


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