https://www.optosigma.com/us_en/opto-mechanical-components-2/lens-mounts/fixed-lens-mounts/high-stability-fixed-lens-mounts.html
High Stability Fixed Lens Mounts
Our High Stability Fixed Lens Mounts are suitable for mounting from a thin single lens to a thick achromatic lens. Available for several lens diameters.
fixed lens mountshighstability