Midwest Optical Systems Bi832-30.5 Washdown Light and the iris setting is

and the iris setting is secured by thumb screw

M12 (S Mount)

Midwest Optical Systems BN785-13

BASIC STANDARD 6" LINK DUAL ARM KIT (No mounting plates included)

They are optimized for working distances from 250mm to 1

Midwest Optical Systems Bi832-30.5 Washdown Light and the iris setting isMidwest Optical Systems Bi832 30. 5 Near IR Interference Bandpass M30. 5 Bandpass Interference Filters Bi Series Narrow Interference Bandwidth 20 35nm FWHM; Narrow bandwidth High transmission ? 85% Designed for use with laser diodes Ideal wavelength separation when multiple light sources of similar wavelengths are present Reflective, mirror type surface that helps minimize thermal effects Available in sizes up to 79. 5mm sq. APPLICATIONS: Bi Series