Askar M54-to-M48 Backfocus Adjuster The Askar M54-to-M48 Backfocus Adjuster provides continuously adjustable spacing between a telescope or corrector and the camera train. It has an M54×0.75 female telescope connection and an M48×0.75 male camera connection.
Manufacturer model: Askar M54-to-M48 Backfocus Adjuster · Specifications checked against manufacturer data on 2026-11-04
The Askar M54-to-M48 Backfocus Adjuster provides continuously adjustable spacing between a telescope or corrector and the camera train. It has an M54×0.75 female telescope connection and an M48×0.75 male camera connection.
Adjustment range and scale
The nominal thickness is 18 mm, with ±2 mm adjustment for a 16–20 mm range. Rotating the body changes the effective separation.
Installation
The CNC-machined assembly has two fixing-screw holes. Use it as part of the total camera-spacing arrangement for the particular corrector, including other adapters and filters.
Optical-train fit
Match both thread pitches and genders to the adjoining equipment. The 16–20 mm figure describes adjustable thickness, rather than a clear aperture or a two-axis dimension.
Askar M54-to-M48 Backfocus Adjuster The Askar M54-to-M48 Backfocus Adjuster provides continuously adjustable spacing between a telescope or corrector and the camera train. It has an M54×0.75 female telescope connection and an M48×0.75 male camera connection.
Manufacturer model: Askar M54-to-M48 Backfocus Adjuster · Specifications checked against manufacturer data on 2026-11-04
