Paper Exposure

DSB

 

 

Best with a Cold Light RoundZvihead enlarger head. (Not with a condenser enlarger, it has a light bulb/pær in it with lenses, yeilds the Callier effect)

A photocell in the enlarger head connects to the time and montiors light output and adjusts the time to expose the paper.
This keeps the exposure constant.           Some detail

COMPENSATING ENLARGING TIMER

ZVICompEnlrgTmer