About this product
Model: ts_monorail_newtonian
Part Number: MONORAILN2
TS Monorail 2" Dual Speed Newtonian Focuser
The TS Monorail focuser for Newtonian telescopes is an improvement of the time-tested Crayford focusers. Our goal was to offer a focuser for highest loads, like heavy CCD cameras, with very high precision at the same time. We exactly succeeded in this with the Monorail focusers.
The advantages of the TS Monorail Newtonian focusers at a glance:
- higher load capacity than with normal Crayford focusers - instead of small ball bearings, a massive stainless steel rail, which is laterally clamped, is used.
- more precise guiding of the draw tube and no more tilting when locking
- smooth motion and finest adjustment even at loads of up to 4 kg
- 1:10 dual speed for accurate focusing
- Motor focus can be retrofitted
Operating principle of the Monorail focuser and the advantage compared with Crayford focusers
Instead of small ball bearings, like in Crayford focusers, a massive stainless steel rail handles bearing and also lateral fixing.
The disadvantage of Crayford focusers with ball bearings: The small ball bearings of the Crayford focuser are loaded if locked. As the locking screw is not placed exactly between the ball bearings, one pair of the bearings is more heavily loaded. This results in tilting and unsharp stars in one corner.
The advantage of the MONORAIL principle: The function of the ball bearings is taken over by the stainless steel rail which is firmly connected to the draw tube. Nothing can bend anymore. Only lateral guidance is taken over by ball bearings. These bearings only fix the lateral position and do not need to take on load anymore.
The drawtube is fixed with a locking screw which is exactly centred at the upper side, so the entire construction is evenly loaded. Tilting is definitively avoided, the draw tube stays exactly at the given position.
Features
- Telescope connection: Dovetail ring - 78 mm large diameter - fits our Newtonian bases
- Eyepiece side connection: 2" and 1.25" receptacle with compression ring
- Minimal height with base: 75 mm
- Draw tube travel: 50 mm
- Dual speed 1:10 for accurate focusing
- Bearing via stainless steel rail - absolutely free from twisting
- Central locking of the draw tube, guaranteed without tilting
Specifications
| Telescope connection: | Dovetail ring - 78 mm large diameter |
| Eyepiece side connection: | 2" receptacle with compression ring and reduction adapter to 1.25" |
| Minimal height without base: | 70 mm |
| Minimal height with base: | approx. 75 mm |
| Draw tube travel: | 50 mm |
| Gear reduction: | included |
| Bearing: | Stainless steel rail - Monorail principle |
| Weight: | 730g |
Customer reviews
FAQ
Please fill in the form below to ask a question.
Wish List
95% Positive Feedback
Easy 30 Day Returns
Friendly Expert Support
Competitive Pricing
Fast Worldwide Shipping
