I was using the same technique back in the day when I was maintaining my Pentax ...

karavelov on March 4, 2023 | parent | context | favorite | on: How to measure milliseconds mechanically for camer...

I was using the same technique back in the day when I was maintaining my Pentax MXs but using a fluorescent lamp as a source - they blink with the AC power cycle - 50 or 60Hz depending on your country.