10 I ENGLISH
2. Open SkyPortal, tap the scope icon, and tap “Connect
and Align”. Follow the on-screen prompts and StarSense
will automatically align your telescope.
StarSense is aligned, but there’s just one first-time-
only step before you’re ready to go: Calibrate the
camera to the telescope.
3. After the StarSense alignment is complete, select a
bright star in SkyPortal by tapping it on the screen, then
tap “GoTo”. If the star is not in the eyepiece’s field of
view, start by centering it in the StarPointer, then center
it in the eyepiece.
With the star centered in the eyepiece, tap Align, then
tap Calibrate. Once the camera is calibrated, follow the
prompts to start a new StarSense Auto alignment. You
only need to do this the first time you are using
StarSense with the telescope in SkyPortal.
Installing & Using The Barlow Lens
Your telescope also comes with a 2x Barlow lens which
doubles the magnifying power of each eyepiece. To use the
Barlow lens, insert the Barlow between the diagonal and
the eyepiece.
Note: Start by using a low power eyepiece as it will be
easier to focus.
Installing The Moon Filter
To use the moon filter, simply thread the filter to the chrome
barrel of the eyepiece.
Aligned and Ready to Observe!
Tap objects on your screen and select GoTo, or search for
a specific object in the search field. To start out, you can
choose from “Tonight’s Best” list in SkyPortal under the
Search menu.
Important Information About
Your Edge HD 9.25” Optical Tube
Assembly
Your EdgeHD is optimized for both visual astronomy and
astrophotography, delivering images free of coma or field
curvature across a large image circle. Start by using the
supplied 1.25” visual back, Star Diagonal, and eyepieces
to familiarize yourself with the telescope.
Primary Mirror Clutch Knobs
(for Astrophotography Only)
These clutch knobs (shown in overview image) hold the
mirror in place to prevent movement during a long exposure
astrophoto. Keep these loosened unless you are using a
camera for long exposures.
When using a camera, focus the telescope first, then
tighten the knobs.
Warning: Do not turn the focus knob with the
clutch knobs tightened. Anytime you refocus the
telescope, loosen the clutch knobs.
Optimum Camera Distance
The 9.25” EdgeHD was designed to work with your camera
at a specific distance from the end of the threads (of the
adapter plate shown in the diagram) on the back of the
scope to the camera’s sensor.
If you are using a DSLR, the distance is already set
correctly when you use these standard adapters available
from Celestron:
T-ring for the make and model of your camera
T-adapter for 9.25” EdgeHD
If you are using an astronomical CCD camera, you must
determine the necessary adapter length to the camera
body.
The total distance from the end of the adapter plate
threads to the camera sensor should be 146mm.
This is the total required backfocus distance. Your camera
body to the imaging sensor will take up some of this
backfocus distance. Your camera manufacturer will usually
specify the camera backfocus distance. For example, if your
camera’s backfocus distance is 55mm, then you will need
91mm of spacing to reach 146mm.
Fastar Compatibility and Imaging at f/2
EdgeHD 9.25” - Optimum Back Focus Distance
Remove Visual Back
Camera Adapter
or T-Adapter
Camera
Focal
Plane
Adapter
Plate
Secondary
Mirror
Corrector Plate
Secondary Mirror
Mount Plate
Secondary
Mirror
Retaining
Ring