sjefjans Posted September 10, 2017 Share #1 Â Posted September 10, 2017 Advertisement (gone after registration) I have tested my mp (film) and found out thet the lower exposure timing is not correct anymore. I dont know what happened. What could be the reason for this? Link to post Share on other sites More sharing options...
Advertisement Posted September 10, 2017 Posted September 10, 2017 Hi sjefjans, Take a look here Exposure times not correct. I'm sure you'll find what you were looking for!
a.noctilux Posted September 10, 2017 Share #2 Â Posted September 10, 2017 May it be time for a "Clean Lubricate Adjust" (CLA). Mechanic is just that. Â At some point, Leica M need some services by a competent tech. Â One of the big reasons why I'm happy to buy new M-A, my M2/M4/M6/MP needed expensive CLA (or repair) from time to time when good function is required. As side note, you may NOT use those slow speed. Â My decades long experience of Leica M teached me that it's better sending soon for CLA before beeing upset by mediocre/bad results. Link to post Share on other sites More sharing options...
250swb Posted September 11, 2017 Share #3  Posted September 11, 2017 In which aspect is it incorrect, exposure times too long or too short and by how much? Are your incorrect exposures because of an inaccurate meter? Link to post Share on other sites More sharing options...
michaelwj Posted September 11, 2017 Share #4 Â Posted September 11, 2017 How did you test it? How wrong were they? They only have to be within 1/3 of a stop to be accurate enough. How often do you use the slow speeds? Â Now, its a mechanical camera that's designed to be used. Sitting idle is not good for keeping it working smoothly. I was once told that every month or so (between films) to run through all the speeds a few times to keep them all in order. I used to have slow speed sticking issues, haven't since I started exercising them (years and years now). Before you spring for a CLA, give it a workout. Link to post Share on other sites More sharing options...
spydrxx Posted September 11, 2017 Share #5 Â Posted September 11, 2017 Most manufacturer's tolerances on mechanical shutters are within +/- 1/3 of an f stop on a consistent basis. If yours isn't AND you use slow speeds a lot, then maybe a CLA is worth it. Otherwise, I wouldn't concern myself, as mentioned earlier, film latitude usually will adeuately compensate. Link to post Share on other sites More sharing options...
sjefjans Posted September 11, 2017 Author Share #6 Â Posted September 11, 2017 I was alarmed when I was going to do a shot with one sec exposure. The sound was different. Not cl-rrrr-ick but click. That's why I shot some photos with 1 sec, 2, 4, 8 15 etc. The slower exposures were wrong. I hardly use these exposure times.... Link to post Share on other sites More sharing options...
Shac Posted September 11, 2017 Share #7 Â Posted September 11, 2017 Advertisement (gone after registration) Were the long exposures over or under exposed, or ?? Link to post Share on other sites More sharing options...
TomB_tx Posted September 11, 2017 Share #8 Â Posted September 11, 2017 These longer times all rely on a separate "clockworks" escapement that delays the second curtain release. Sounds like a CLA is needed for the slow speed mechanism. Link to post Share on other sites More sharing options...
sjefjans Posted September 12, 2017 Author Share #9 Â Posted September 12, 2017 Were the long exposures over or under exposed, or ??underexposed Link to post Share on other sites More sharing options...
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