Askar M54/M54 Backfocus Adjuster - BFA-M54 85mm Refractors Dioptrx allows seeing your normal

Dioptrx allows seeing your normal maximum contrast that eyeglasses can diminish (remove your eyeglasses and see how contrast improves in normal vision)

With its standard Ultra High Transmission Coatings (UHTC) gives you the sharpest

25" eyepieces

the Delta T would decrease

Askar M54/M54 Backfocus Adjuster - BFA-M54 85mm Refractors Dioptrx allows seeing your normalThe M54 version of the Askar backfocus adjuster's front telescope interface is female thread M54x0. 75 and the rear camera interface is male thread M54x0. 75, the overall thickness is 18mm and offers 2mm adjustment range. The backfocus adjuster is CNC machined. Each unit is a 0. 05mm precision adjustment, the surface is printed with a scale for easy adjustment and to save the position. There are two holes for fixing screws, which make the adjuster