TS-Optics 2 inch rack and pinion focuser with additional thread for accessories up to 5 kg

TSRAP2DEL - the system focuser for telescope improvement and telescope self-construction

The focuser is ideal for Cassegrain telescopes, SCT or refractors. It is also exciting for Newtonian telescopes, if enough working distance is available. The focuser is designed for astrophotography, it can be loaded with accessories up to 5 kg without tilting.

The advantages and product features of the RAP2DEL focuser:

Decoupling of the adjustment from the bearing of the drawtube, thus making the drawtube stiff with simultaneous sensitive adjustment.

33 mm travel with scale

M54x0.75 female thread for screw adaptations

Flexible adaptation to all common telescopes via ready-made adapters or custom-made by Telescope-Service

Anti-reflective rings inside the drawtube available

The draw tube accepts all 2" adapters, eyepieces and correctors

Dual-speed provides accurate focus adjustment for astrophotography.

The movement of the focuser can be easily adjusted with two small grub screws on the top.

A fixing screw in the center fixes the focus position

Two internal threads for the connection of a finder shoe are available

Solutions for motorized adjustment are available

Screw connection of correctors through the M54x0.75 thread:

If the corrector is screwed to the focuser, this prevents tilting. Many correctors offer the M54x0.75 connection thread on the telescope side. This makes it possible to screw it on without any problems.

Simply unscrew the 2" adapter and an M54x0.75 female thread is available. This makes the focuser even shorter by 15 mm. Adapters to other connection threads such as M48, M63 or M68 are of course available.

The adaptation of the focuser to telescopes:

The RAP2DEL is equipped with a ring dovetail (male) on the telescope side. The dovetail has a diameter of 70 mm at the thickest point and is 6 mm deep. We offer ready-made adapters, for example for Newtonian telescopes from GSO, Teleskop-Service or Skywatcher, but also for RC telescopes from GSO, AstroTech and Teleskop-Service (M90 or M117). Especially attractive is the adapter to Schmidt-Cassegrain telescopes from Celestron or Meade. Further adapters, e.g. for different refractor telescopes, are in development. On request, we can also produce a special adaptation to your telescope, we will be happy to advise you.

Operating and adjustment instructions

The operating and adjustment instructions for the RAP2DEL can be found here.