TS-Optics 50mm Extension Adapter for M90x1 Thread
Spacer sleeve with a length of 50 mm for telescopes with connection thread M90x1, e.g. RC telescopes from TS-Optics, Astro Tech, GSO...
♦ Telescope side thread: Internal thread M90x1 (female)
♦ Thread on the side of the focuser: External thread M90x1 (male)
♦ The adapter is screwed between the rear wall of the telescope and the focuser and thus increases the distance between the focuser and the tube.
€119.76
(VAT incl.)
Entrega entre 8 y 10 días laborables
Reference:
GSRCV50
TS-Optics M90 extension tube for thread M90x1 - length 50 mm
Many telescopes, such as the Ritchey-Chrétien telescopes, have a long back focus. This generous focus distance allows the use of a focal reducer or accessories such as off-axis guides. However, if you only want to attach a camera or perhaps want to observe directly, then the focuser must be fully extended and use additional 2" extension sleeves. This reduces stability.
This M90 extension solves the problem. It screws between the focuser and the telescope and increases the distance between the telescope and the focuser - see figure on the left.
The focal plane or focus moves closer to the focuser and you don't have to extend the drawtube as far. To achieve an exact fit, you can also screw several M90 extension sleeves together. Another advantage is the better lighting. The clearance of the extension sleeve is significantly greater than the clearance of a 2" extension sleeve.
| Thread at telescope side: | M90x1 thread (female) |
| Thread at focuser side: | M90x1 thread (male) |
| Optical path: | 50 mm (without male thread) |
| Material: | Aluminium black anodized |
What´s included in the bos:
Ts-Optics Adapter
English GB
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