rodinal
film user
What started as a weekend project took a pair of extra days, but I've just finished the calibration of a shutter speed measurement device based on an Arduino board.
All started with a malfunctioning M2 body that was brought to life again by a very skillful friend of mine. My ears told me that something was not right with the shutter speeds, but had no means to measure them.
I first tested with a CRT TV screen and a series of test exposures and checked that exposure was even across the frame, but the amount of exposure (shutter speed) was not right. So, I decided to build a meter to test speeds using some parts I already had. It took an Arduino UNO board, a LCD_RGB display shield, a laser diode, a phototransistor, some resistors, connectors, cables, and a CD box used as a base. Of course, some simple coding was necessary too. The system was calibrated using a Contax G2 shutter as reference. The gizmo works quite well from 1/4000 seg to 4 segs (the entire range of speeds of the G2).
I've not tested the camera that started this project as it's loaded with film now, but tested an Hexar RF (not too good really) and a Minolta CLE (excellent performance), quite surprising...
All started with a malfunctioning M2 body that was brought to life again by a very skillful friend of mine. My ears told me that something was not right with the shutter speeds, but had no means to measure them.
I first tested with a CRT TV screen and a series of test exposures and checked that exposure was even across the frame, but the amount of exposure (shutter speed) was not right. So, I decided to build a meter to test speeds using some parts I already had. It took an Arduino UNO board, a LCD_RGB display shield, a laser diode, a phototransistor, some resistors, connectors, cables, and a CD box used as a base. Of course, some simple coding was necessary too. The system was calibrated using a Contax G2 shutter as reference. The gizmo works quite well from 1/4000 seg to 4 segs (the entire range of speeds of the G2).
I've not tested the camera that started this project as it's loaded with film now, but tested an Hexar RF (not too good really) and a Minolta CLE (excellent performance), quite surprising...





