GraLab Model 451 High-Accuracy Digital Darkroom Electronic Timer Black & White Chemicals a sensor on the flash

a sensor on the flash detects the brightness

is recommended for best results

Note: To correctly place the film inside plastic cartridges

Offering photographers a chance to get the best possible light from their flash with out having to carry cumbersome equipment

Ilford FP4 Plus is very suitable for most photographic subjects under a variety of lighting conditions

GraLab Model 451 High-Accuracy Digital Darkroom Electronic Timer Black & White Chemicals a sensor on the flashHighly visible 2 digit LED display. Accessory outlet allows automatic switching of external device. Metronome or end of cycle tone notification. Accuracy: + . 01% @ 1 second Limited one year warranty