Astronz
Coma Corrector 2"
Coma Corrector 2"
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Suitable for Newtonian telescopes from f/4 and slower.
This coma corrector can be placed completely inside a 2" focuser and offers a high grade of correction and also a low degree of vignetting. The generous back focus of 70mm allows the use of off-axis-guiders.
M48 thread connection for good field illumination. M48 x 0.75mm (2") Filter threads. Offers 44mm of illuminated field diameter - even full format sensors can be used. Long working distance (70mm) - enough space for off- axis-guiders and filters.
There is no change of the focal length of the telescope
Connection:
- Telescope side: 2" barrel with 2" female filter thread
- Camera side: M48x0.75 male thread - fits directly to further adaptions, filter drawers, off-axis-guiders and more. Includes a T2 (42mm) adapter ring.
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Unfortunately, the Coma Corrector comes without instructions. It comes with a separate T-ring, not labelled, so I had to ask what it was. With the Coma Corrector in my 12" Dob, I haven't been able to bring my eyepiece to focus, so how well it works I can't say yet. After searching online forums, I discovered that a spacer needs to be inserted in the coma corrector, so I'm going to need to work out what size spacer I need, and buy it.