TSOptics Dual-Speed 2-inch Crayford Focuser for SCT Telescopes
2" Schmidt Cassegrain Focuser with 1:10 micro transmission and 1.25" reducer
Focusing a Schmidt-Cassegrain is sometimes a problem because of the mirror shifting thus making sharp astro photos or critical observation tricky.
Our SC-Focuser solves this problem. Due to the Crayford friction principle, it is absolutely free from shifting and offers very good craftmanship. It supports accessories up to ca. 4 kg.
1:10 micro transmission
Precise focusing is essential for successful astro photography. One revolution of the micro focuser knob moves the drawtube by 1.4mm. A twist of 10° gives only 0.038mm travel - that's precise enough even for critical applications.
Orientate your star diagonal or camera without loosenig locking screws. Search for a guide star with an Off-Axis-Guider without touching the camera. Just turn the knurled knob on the telescope side of the focuser and you can rotate the whole focuser with its accessories.
Drawtube locking mechanism
It disengages the focusing mechanism and holds the drawtube in place firmly. This is essential for astro photography.
The focuser's travel is ca. 25mm that is more than enough. Coarse focusing is done with the telescope's main mirror - fine tuning is performed afterwards with the TS Crayford.
Weight appr. 700g
Focuser's height from SCT connection to 2" access: 90mm
A reducer from 2 to 1.25" with brass clamping ring and 2" filter thread is included.