3.Secure the barrel in place by firmly tightening the thumbscrew on the 1.25" eyepiece adapter.
To attach a 2" diagonal or extension tube to your telescope:
1.Loosen the thumbscrew on the Crayford focuser’s 2" eyepiece holder and remove the 1.25" eyepiece adapter.
2.Insert the barrel of your diagonal or extension tube into the 2" eyepiece holder.
3.Secure the barrel in place by firmly tightening the thumbscrew.
1.25" Eyepiece adapter thumbscrew
2" Eyepiece holder thumbscrew
To insert a finder scope onto your EON refractor, slide the finder scope bracket into the finder scope dovetail base and secure it in place by tightening the thumbscrew(s) on the dove- tail base (Figure 6).
Brass compression ring
2" Eyepiece holder | 1.25" Eyepiece adapter |
Figure 4. The EON refractors accept both 1.25" and 2” accessories. The brass compression rings in the 1.25" eyepiece adapter and 2" eyepiece holder ensure a secure fit without marking up the barrel of your accessory.
Finder Scope Compatibility
The included finder scope dovetail base on the EON 80mm and 120mm refractors are ready to accept any Orion finder scope. The EON 72mm does not include a finder scope dovetail base; however, it is available optionally from Orion and directly fits the holes in the EON 72mm (Figure 5).
Holes for optional finder scope dovetail base
Figure 5. The EON 72mm is compatible with the Orion finder scope dovetail base.
Figure 6. Slide the finder scope bracket into the finder scope dovetail base and secure the locking thumbscrew(s).
Operating the EON
Refractor
Now that you have become familiar with the different fea- tures and functions of your EON refractor, you are ready to begin using your new telescope outside under a starry night. The EON refractors are essentially ready to begin observing with immediately. There is a small period of time where the internal temperature of the telescope must match the out- side temperature to obtain the best image quality. This time period is nearly nominal, taking only a few minutes. Typically, the EON will have reached outside temperature by the time the telescope is setup.
Mounting block
Dovetail plate
Figure 7. The EON 72mm and 80mm have a
4
