Askar M54/M48 Backfocus Adjuster - BFA-M48 vintage 10x and 20x eyepieces with

10x and 20x eyepieces with 4x

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Askar M54/M48 Backfocus Adjuster - BFA-M48 vintage 10x and 20x eyepieces withThe M48 version of the Askar backfocus adjuster's front telescope interface is female thread M54x0. 75 and the rear camera interface is male thread M48x0. 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