HOW DOES THE TIMER DO SPLIT FILTER VARIABLE CONTRAST PRINTING?
The timer has high H and low L channels for variable contrast printing. The exposure sequence – base, dodge and burn exposures – for each channel is entered into the timer. There can be multiple dodge, burn and progressive burn sequences in each channel. The dodges and burns track the base exposure of only their own channel. The timer provides two methods of split filter printing: • Independent control of exposure and contrast. The first channel determines the base exposure for the whole print. The second channel controls the contrast and is set in stops +/- relative to the first channel. In this way the contrast stays constant when the base exposure is changed. • Seperate high and low contrast exposures. The channels do not track. This method may be prefered by traditional split-filter printers who make two test strip prints: one for the high contrast exposure and one for the low. The timer prompts for the high or low contrast filter and then exposes the base, dodge and burn exposures
