Microtek, Poly Dust Cover, Mt-010 (11" Wide X 25" Deep X 26" High)

This won't tear like vinyl covers will and won't shed lint like cotton covers will. The MT-010 cover is a large cover and easily covers my zeiss polarizing scope even with a long, vertical camera mount.

Material (polyester) is very rough texture, almost like a kitchen sink scrub pad. I am concerned it could scratch delicate optics. I much prefer either soft cloth or vinyl dustcovers; the blue Zeiss ones are the best I've found so far.