How do you use OAG?
- 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.
How do you connect OAG?
Attach OAG body to the telescope. Insert the prism part into the OAG body. Mount the guide camera. Screw the T2 or M48 adapter on the imaging camera according to your the mount type.
What is differential 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.
Is auto guiding necessary?
Autoguiding is only necessary when taking exposures of at least 30-60 seconds. If you’retaking short images or video clips of bright objects like the Moon or planets, or you’re taking sub-frames (‘subs’) of deep-sky objects of less than 30 seconds, you may not need to guide during your images.
How does the off-axis guider work?
Celestron’s Off-Axis Guider addresses these challenges by: Providing a large 12.5 mm prism that can be adjusted to move closer to the center of the telescope’s focal plane, depending on the size of the imaging camera. This results in brighter guide stars, with the help of the large prism to fully illuminate the autoguider sensor.
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.
What is off-axis guiding with the ioptron skyguider pro?
Off-axis guiding with the iOptron SkyGuider Pro. 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.
What are the disadvantages of off axis guiding?
Off axis guiding has several drawbacks. First of all it is less suitable for small aperture and/or slow telescopes (with slow focal ratio). Field of view of such device is quite small, so it can be quite hard to find any guide star. Basing on my experience, with 8″ f/4 newton I almost always was able to find a guide star in OAG camera.