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Forum: Pentax Lens Articles
06-27-2020, 06:02 AM
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As long as you're not distant focusing, use one of the flanged adapters - the better quality plated brass ones, not the cheap black anodised ones..
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Forum: Pentax Lens Articles
10-22-2018, 06:00 AM
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The petri is like an "M" series lens. You need to use M manual mode. The green button is then your means of metering but personally I just chimp a couple of shots and then adjust exposure (shutter) according to the aperture set.
Lenses without the electrical contacts of the "A" and later lenses will not stop down in Av or TAv on a dslr, the dslr's lack the aperture simulator connection of the film cameras. The only hack around is to not fully mount the lens - at the risk of the lens falling off!
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Forum: Pentax Lens Articles
07-08-2017, 09:33 AM
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Most often this is due to a problem with the electrical connection of the third contact - #6 in this pic - try eg a bit of rolled up alu foil wedged in there.
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Forum: Pentax Lens Articles
10-26-2016, 12:22 PM
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Google translate: "I would like to put on record my views on this subject. I bought the B & H two adapters rings to use my old lenses 42mm thread, the Pentax K-r I just purchased. I got the rings Bower M42-PK, and try to use them, I had very serious problems. In the first attempt, the ring was caught in the machine body and it was very difficult to remove it. I was getting desperate when luckily and both try, got it. I have been searching the internet and found the information that is necessary to remove a small screw and lock it safe, a small spring steel. The screw is higher than it should be in reality and with it, comes inside the thread, damaging the objective if not pay attention to this detail. I removed the screw and shortened. Until then, everything seemed to be resolved. I put the adapter into the lens and wedged it into the machine. When I tried to remove the lens, this left leaving the adapter attached to the machine body. So if they want to use this adapter, please withdraw the bolt and latch, or have serious problems. The lens will not be caught in the machine, but there is no danger of it is released by simply taking a little care.
I hope that this observation is of some use."
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