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Forum: Pentax SLR Lens Discussion
01-08-2022, 02:49 PM
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When you have removed the tripod mount, you lift the rubber from the focusing ring to free three grub screws. When loosened the distance scale can be removed, revealing three cross headed screws. Removing these frees the DOF scale ring under which are three screws holding the rear lens tubus. Now you can reglue the baffle if needed and you have excellent access to the rear element to clean it.
Regards,
Wim
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Forum: Troubleshooting and Beginner Help
06-19-2021, 06:04 AM
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One detail that can easily be overseen: The helicoid retainers are different, one is with flat screw heads, the other with countersunk holes. Make note (or photo) which is where, otherwise the diafragm mechanism get stuck. Another thing is that, as long as you don't need to work on the aperture blades, I would advise to not completely remove the lens block, but only the front and rear lens group. Recalibration of the apeture mechanism by rotating hte lens block is not easy.
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Forum: Troubleshooting and Beginner Help
12-29-2020, 02:39 AM
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The K1000 uses a simple SR44 or LR battery. The metering circuit is identical to the Spotmatic F, which is virtually battery voltage independent. I have to see the first SPF or K1000 (or KM) camera with a dead lightmeter caused by anything else than a broken wire.
Regards.
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Forum: Troubleshooting and Beginner Help
12-26-2020, 02:52 PM
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Without a battery, the meter needle should be centered. With a battery and the ASA set to 200 plus shutter speed to 1/250 s, when you remove the lens and in a dimly lit room, the needle should point fully downward. If not, the meter does not work.
First guess must be that the battery connection is faulty. That could be the contact in the battery chamber, but the K1000s are known for a corroded solder connection under the battery chamber. You need to remove the bottom cover and then there are two screws holding the black plastic battery chamber. When loosened, you can inspect the soldered wire. If disconnected, you will have trouble resoldering while the soldering lip of the battery chamber seems to be stainless steel. Also the wire might be rotten over some length. If you succeed to make a new connection, everything will be fine.
Good luck!
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Forum: Film SLRs and Compact Film Cameras
12-13-2020, 04:44 PM
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Remarkable! I checked the Dutch veersion manual and it says B and 1/125, both on pages 4 and 14! I have this camera, but never tested it.
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Forum: Pentax SLR Lens Discussion
07-02-2020, 05:58 AM
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I finally dared to attack the problem. Still not knowing how to enter from the front I did remove the mounting ring. Be aware of threadlocked screws! I start heating the screw had with an adapted soldering iron. Just touch the screw head, while holding the barrel with your thumb. Holding it prevents you from overheating! After two minutes or so the threadlock weakens enough to unscrew rather easy, not damaging the screw head. And don't forget: buy yourself a set of quality JIS screw drivers.
No case of oily aperture blades! Under the mounting ring there is a ring to operate the aperture mechanism. There was some oil on this ring. I just cleaned the ring and the surrounding surfaces. Now everything is fine! From now on I am the lucky owner of a pristine Pentax-K 1.8/85mm lens. Ready for use on my Pentax K1MKII.
I am a proud Pentax tinkerer!
Regards, Wim
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Forum: Repairs and Warranty Service
10-10-2018, 03:43 AM
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I managed to remove the mount! Unknown what action made it work. I carefully added penetrating oil via the three holes in the mounting ring and additionally I had the help of my wife (holding the lens firmly) why I grapped the mounting ring using rubberized gloves to have more grip. And then it came loose. Obviously the mounting ring was at least turned 20 degs too far clockwise. Maybe the former owner was too anxious the ring would loosen with a mounted camera.
Lessons learned:
That mounting ring can get stucked firmly;
Carefully applying penetrating oil might help;
Much torque can be needed to unscrew the mounting ring;
Rubberized gloves improve grip on the ring;
Ask your wife (or somebody else) to hold the lens body firmly.
Regards,
Wim
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