How do you use OAG?
How do you use OAG?
Setup Guide
- Calculate the correct distance for your imaging train.
- Take off the guider prism part from the OAG and attach the OAG body to the telescope.
- Insert the prism back into the OAG body.
- Mount the guide camera.
- Screw the T2 or M48 adapter on the imaging camera according to your cameras mounting type.
What is flexure in astrophotography?
Differential flexure is where the guide camera / guide scope moves independently from the imaging scope / camera. The focuser movement is a good place to start.
Can you autoguide without a computer?
The SynGuider – stand alone Autoguider can guide an equatorial mount without the help of a PC/Laptop, improving productivity during astro-photography sessions, helping you to obtain perfectly round stars during long exposure times. Supplied with guiding handset & cable, serial cable and battery pack.
What is Finderscope telescope?
A finderscope is a simple but invaluable accessory that attaches to your telescope. The smaller optical tube provides a wide field of view to help you locate celestial objects before observing them through your main telescope, but it must be aligned accurately to your telescope before use.
What focal length should my guide scope be?
As a rule of thumb, the focal length of the guide scope needed to be at least 1/3 the focal length of the imaging scope when guiding visually.
What is telescope flexure?
Differential flexure occurs when part of the imaging system shifts slightly, while other parts do not. These parts may be the guide scope, the guide scope focuser, the guide camera, the main telescope, the main focuser, and/or the main imaging camera.
What is an off-axis guider (OAG)?
What is an Off-Axis Guider (OAG)? An off-axis guider (OAG) sends starlight to your guide camera using an internal pick-off prism that collects light running off of the telescope axis. An OAG allows you to utilize your primary imaging camera and telescope for autoguiding, without the need for an additional guide scope.
How does off-axis optical guiding work?
In off axis guiding in the main optical train there is a small prism (usually a few mm large) that redirects small path of light to the outside of the tube, and there some small CCD camera waits for this light to do short exposures, detect stars and calculate guide errors.
How do I use the ONAG to select the guide star?
The ONAG has an integrated X/Y stage for your guider which provides a wide field of view (FOV) for selecting the guide star. As a matter of fact the ONAG allows for ON, as well as OFF axis, operations presenting you scope FOV to your guider.
How does the Celestron off-axis guider work?
The Celestron Off-Axis Guider uses a prism to intercept a small portion of the telescope’s focal plane (outside the field of view of the main imaging camera) to locate a guide star. Any movement seen by the guide star will be the exact same movement seen by the imaging camera.
https://www.youtube.com/watch?v=3G1ZYF9PTjk
