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Askar M48/M54 Back Focus Adjuster
In daily astronomical shooting, the back focus will have an influence. Astronomical photographers are often frustrated by the change of back focus due to various reasons such as refraction of filters or whe...
Reviews
5.0
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Very high quality adjuster
I am pleasantly surprised by the quality of this backfocus adjuster. It has detents at fine intervals and takes the headache away of the need to add or taking away shims when adding or removing filters or just fine tuning backfocus. Very good quality for sure.