Slide frames Bonum 50x50 21x16mm. code 2159

Bonum 50x50x3 mm. Slide frames without glass give you the
option to correct height, rotation errors. The system works with small
perforation strips. With each box a small bag with white strips are supplied
giving no correction, only left-right shift. Correction strips have to be
ordered sepperately. Every box holds 50 frames (good for 25 stereo pairs).