The Monorail focuser is a heavy-duty focuser for heavy CCD cameras, for example, while maintaining high accuracy.
The MonorailR96 fits directly onto many refractors from Skywatcher, Orion and Celestron: Improve your refractor with a first-class focuser!
- Connection flange: 96 mm diameter with three M4 internal threads
- Minimum height from connection flange to 2" plug-in sleeve: 94 mm
- Adjustment range: 50 mm
- 1:10 fine drive
- Brass ring clamp suitable for 2" and 1.25" accessories
The advantages of Monorail focusers:
- Higher load capacity than normal Crayford focusers: instead of small ball bearings, a solid stainless steel rail is used, which is guided laterally.
- More precise guidance of the inner tube and no more tilting when clamping
- Smooth running and extremely fine adjustment even with loads of over 4 kg
How the MONORAIL focuser works and its advantage over Crayford focusers:
Instead of small ball bearings, as in Crayford focusers, a solid stainless steel rail provides the bearing and also the lateral fixation.
The disadvantage of ball bearing Crayford focusers: The small ball bearings of the Crayford focuser are stressed when clamped. Since the clamping screw is not exactly between the ball bearings, one pair of ball bearings is subjected to greater stress. The result is tilting and blurred stars in one corner.
The advantage of the MONORAIL principle: the ball bearings are replaced by a stainless steel rail that is permanently connected to the extension tube. This prevents any twisting. Only the lateral guidance is still provided by ball bearings. However, these bearings only fix the lateral position and no longer have to absorb any load.
The extension tube is fixed in place by a clamping screw that is precisely centred on the top. This ensures that the entire structure is evenly loaded. There is absolutely no twisting and the extension tube remains 100% in the prescribed position.
The lower centre screw is used to adjust the friction (friction resistance) only.
TS Optics is a brand of Teleskop-Service.
