During long-exposure astrophotography
it is essential that the photographer to
-
Be able to observe when the telescope starts to wander
slightly off-target.
-
Be able to make small corrections to the telescope?s position
to bring the instrument back precisely on-target.
The Meade Off-Axis Guider solves the first of these requirements;
namely, it permits the user to monitor an exposure simultaneously as the photograph is being taken.
Drive correctors solve the second requirement.
The Off-Axis Guider couples the camera body to the telescope for prime
focus photography. A small part of the light at the edge of the telescopic field is diverted at a 90?
angle to the Off-Axis Guider, where it is observed on the crosslines of an illuminated reticle
eyepiece to detect any change of position.
The Off-Axis Guider has been used in this way countless times to
obtain very high quality long-exposure photographs of deep-space objects.
Mounting:
The Off-Axis Guider threads to the rear cell of all
Meade LX-Series mirror-lens telescopes, to Model 203SC/ 500, and to other brands of Schmidt-Cassegrain
telescopes.
- Use with the appropriate T-Mount adapter (ordered separately),
for the camera brand used.