Meade Deep Sky Imager, Руководство пользователя, Страница: 18 / 58

1. Open the Envisage program.
2. Insert the Deep Sky Imager camera into the telescope eyepiece holder. Do not tighten the eyepiece holder
thumbscrew. Make sure the Deep Sky Imager camera slides down as far as it will go into the
eyepiece holder.
3. Point the telescope at a terrestrial object that has a lot of contrast with the surrounding area and if possible,
has a distinctive edge (like a building, for example).
4. If you have previously moved the histogram sliders, move the top slider to the 0 position (move all the way
to the left) and move the bottom slider to the 256 position (move all the way to the right).
5. Click on the Auto Exp (3) button.
6. An image which may be or may not be focused appears on the
display screen.
7. Use the telescope’s focuser to get a rough focus of the object. Be patient.
You may have to rotate the focuser back and forth until you can achieve
focus of the image.
8. When the image is roughly in focus, remove the camera from
the
eyepiece.
9. Place the supplied parfocal ring over the bottom chrome tubing of the
eyepiece. Do not tighten the ring .
10. Place the eyepiece and tubing into the eyepiece holder. Do not tighten
any of the thumbscrews yet . See photo at right.
11. Do not use the telescope focuser in this step. Lift the eyepiece (but not the parfocal ring) until the object is
focused.
12. When the object is focused, tighten the parfocal ring. The eyepiece is now parfocal with the Deep Sky
Imager camera. Do not remove or change the position of the parfocal ring or you will need to repeat
the procedure.
Now, instead of focusing the camera with the telescope focuser (which is somewhat difficult and time
consuming), insert in the eye piece/parfocal assembly and focus the eyepiece as you normally would. Then
remove the eyepiece and replace the camera. You’ll find that the camera is focused and may need only minor
focuser adjustment.
The Parfocal Ring 2
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