Which Pegasus Astro ORBIT Diagonal edition do I need for my telescope?
Your choice depends on your telescope's required backfocus.
Basic Edition: For a 1.25" nosepiece connection with the shortest path (58mm).
SCT 2-Inch Edition: For standard SCTs using a reducer (like the Celestron 0.63x) that requires 105mm of backfocus.
SCT EDGE Edition: Specifically for Celestron EdgeHD scopes with a reducer (like the 0.7x) that demands a precise 146mm backfocus.
How do I set up the Orbit SCT EDGE Edition on my Celestron EdgeHD with the 0.7x reducer?
The SCT EDGE Edition is designed for this exact scenario. You will use the included 3.25" adapter and the variable neck. The neck has a precision-etched mark that indicates the correct extension to achieve the required 146mm backfocus. Simply adjust the neck until the mark is aligned, then use the lock ring to secure it in place for a rigid, repeatable setup.
Can I use 1.25" filters with the Orbit Diagonal to image the Orion Nebula (M42)?
Yes. All editions of the Orbit Diagonal feature an integrated 1.25" filter thread on the top side. This allows you to thread in a light pollution or narrowband filter, like a UHC or H-alpha filter, to enhance contrast on emission nebulae like M42. The system is designed to do this without causing vignetting on a 16mm diagonal sensor.
What threads are on the Pegasus Astro ORBIT Diagonal?
The core diagonal body is highly versatile. On both the telescope side and the camera side, it features a dual-thread design: an outer M48 male thread and an inner M42 female thread. This allows for direct, rigid connections to a wide variety of astronomical accessories.
How does the dual-axis rotation on the ORBIT Diagonal work?
The Orbit has two independent thumbscrews. The first allows you to rotate the main diagonal body relative to the telescope's focuser. The second allows you to rotate your attached SmartEye relative to the diagonal body. This ensures you can always achieve a comfortable viewing angle, regardless of where your telescope is pointing.
What adapter connects the SmartEye to the ORBIT Diagonal?
All three editions of the Orbit Diagonal include the required M54M-M48F adapter in the box. This adapter threads onto the SmartEye side of the diagonal, allowing you to then thread the SmartEye directly onto it for a secure connection.
Is the Pegasus Astro ORBIT Diagonal waterproof?
No. The housing is made from moisture-resistant 6061 aircraft-grade aluminum, but it is not waterproof. It should be protected from rain and stored in a dry environment to prevent damage to the finish and internal optics.
How should I clean the mirror on my ORBIT Diagonal?
Pegasus Astro recommends cleaning the mirror only when absolutely necessary, as small amounts of dust have a negligible effect on image quality and improper cleaning can cause scratches. If cleaning is required, use an air blower first to remove loose particles. Then, apply a dedicated optical cleaning fluid to a clean microfiber cloth (never directly to the mirror) and wipe gently from the center outwards.
