GSO Crayford Focuser

This unit is designed to fit standard SCT rear cell threads (2 inch x 24TPI). If your telescope uses this common thread size, it will attach directly without needing additional adapters.

Stock SCT focusers move the primary mirror, which often causes 'image shift' or 'mirror flop' as the mirror tilts. This Crayford focuser attaches to the back of the scope, allowing you to focus the eyepiece or camera directly without moving the mirror, effectively eliminating that shift.

Yes, it is built to handle a maximum load of 2.7 kg (about 6 lbs). The dual-speed control is particularly helpful for astrophotography, as it allows for the micro-adjustments needed to nail critical focus.

No, the rotation mechanism is independent of the focusing drawtube. You can rotate the entire focuser to find a comfortable viewing angle for your eyepiece or camera without losing your focus point.

Not at all. It features a brass compression ring inside the barrel, which secures your eyepieces and accessories firmly without the metal-on-metal contact that typically causes scratches.

Yes, the unit includes a 1.25-inch adapter. While the focuser itself has a 2-inch barrel, this adapter allows you to seamlessly switch between your 2-inch and 1.25-inch accessories.