MULTISCOPES . ... HOME . ... ABOUT LOMO . ... Home Products Microscopes Multiscopes Trinocular Head HT-30 . ... The HT-30 Trinocular Head , with its superb field flattening ability, is designed to work with LOMO microscopes as well as with other brands equipped with a universal dovetail mount. ... The head incorporates a revolving Magnification Changer with three settings and a sliding Optical Path Selector (OPS) which controls the light distribution between the binocular and the photo/video channel. ...