Radical Instruments offers Semi Automatic Slide Projector. Radical Instruments is an ISO: 9001 certified manufacturer of biological and industrial microscopes and projectors. The Semi Automatic Slide Projector is a compact, modern and economical slide projector. It accepts a magazine of 36 slides and has a manual slide changing system. The Semi Automatic Slide Projector is equipped with 24V/150 Watts, halogen bulb and hard coated anastigmatic lenses 1:2:8/85 mm. This instrument can be operated for longer periods without any damage to the slides due to latest design of condenser & heat absorbing systems.