Wide selection of holders for linear and/or angular adjustment of an optical element. Optical positioners includes: large aperture optical mounts, kinematic mirror and beamsplitter mounts, precision and high stability L-Shaped steel optical mounts, precision kinematic optical mount, miniature mirror/beamsplitter mounts, mirror mounts with locking screws, gimbal mount, round optics adapters, adapters for mirrors and beamsplitters at 45 deg, adapters for polarizers at 56 deg., budget kinematic optical mounts, precision optical mounts of side control series T, flipping mirror/beamsplitter mount, prism holders, polarizer holders, high precision rotation polarizer waveplate mounts, kinematic adjustable polarizer holders of side drive, vertical drive optical mounts.