Hi all
About 2 years ago, I got into collecting film SLRs made by the - back then - "Big Five" and have since then acquired quite a collection of Canon, Minolta, Nikon bodies and started to complement those by a (slowly) growing number of Olympus and Pentax bodies.For day-to-day photography, I tend to use one of my Canon DSLRs (77D, 5D Mk. IV) and for "experiments" with old MF lenses I have a little M100 in my arsenal which is - being mirrorless - really nice for adapting all this old glas
But from time to time - as far as all the other "chores" allow it - I like to be out in the field with an old-fashioned film SLR, shooting nature and wildlife. So my ambition is to have all the SLR bodies in my collection in reasonable working order...
Recently, I acquired a bundle of Pentax gear that also included an (alleged working) LX. Upon closer inspection, it turned out that it suffered from the well-known - and in this case rather severe - "Sticky Mirror Syndrome", meaning that all three polymer pads (mirror rest left & right + diaphragm actuator dampers ) had decayed into a gooey mess. The mirror light seals have also been in a rather bad shape, i.e. gone "flaky" and slightly sticky. But after carefully cleaning out the debris, it still has a peculiar issue with the mirror - or rather the first shutter curtain:
- If the mirror is locked up via the MLU lever, it works like a charm and timing appears to be reasonable. Whether it actually *is* accurate, I have to check with my newly arrived shutter tester.
- When leaving the mirror in its "default" position, firing the shutter will flip up the mirror but not trigger the shutter curtain(s). If I gently pull on the winding lever or operate the MLU lever, it trips the
shutter.
By doing some "experiments", I found that lifting the mirror part-way (~half way) with the MLU lever while simultaneously firing the shutter works 99% of the time, i.e. mirror flips up, shutter fires and mirror returns. So I (partly) disassembled the body to get a closer look at what is happening: When the mirror gets stuck, giving the lever at the top left hand corner of the mirror box (the one that looks like it is touching "something" that sticks out of the curtain "shaft") does not move far enough towards the back of the camera. Simply "touching" it with the tip of a pinzette completes the shutter cycle (i.e. shutter fires and mirror flips down again), I guess that there is some tiny adjustment by a fraction of a millimeter may be all that is required to get it working again.
Looking closer at the parts that are involved in this, I noticed that there is a tiny, yellow plastic O-ring around some stud/trunnion that looks strangely deformed and may be the source of the issue. Carefully studying the LX Repair Manual, I get the funny feeling that this may be the part "B72" ("Mirror-charge column collar") mentioned on page 31 of that manual.
Is there any point in sending this beauty to have some CLA applied to it might it be a lost cause due to lack of parts? Since I'm located in Germany, I'd prefer one of the few shops around here that still offer service for file SLRs. Anyone got an idea what the price tag on such a service - if it is possible?
Thanks & Regards
Marc