Bell & Howell Slide Cubes lens mount_Pentax 67 with its own diaphragm and

with its own diaphragm and a lens focal length selector that provides appropriate apertures with lenses from 30mm to 200mm

A high quality circular polarizing filter to reduce glare and reflections

and if you're feeling crafty

There's a top compartment for a camera that measures 8x10x16cm and a smaller bottom one

optics are clear

Bell & Howell Slide Cubes lens mount_Pentax 67 with its own diaphragm andBell & Howell Slide Cubes are compatible with Bell & Howell Slide Cube projectors, as you might expect. Its a neat system: you can stash 40 or so slides in each tiny 2 cube. Sold in packs of 3, for a total capacity of about 120 slides. Boxes may have stickers or markings not shown in the images displayed here, which are for illustrative purposes only.