What is field rotation? How does it affect my scope’s viewing and imaging?

Field rotation is the apparent rotation of a celestial object in the field of view of a telescope during the course of the night. All objects in the eyepiece field...

What is field rotation? How does it affect my scope’s viewing and imaging?

Field rotation is the apparent rotation of a celestial object in the field of view of a telescope during the course of the night. All objects in the eyepiece field...

What is back focus? What problems does it cause for visual and photograp...

Back focus is the distance from the end of your eyepiece drawtube to the focal plane of your telescope. It varies greatly depending on the type of telescope:Schmidt-Cassegrain telescopes (SCTs)...

What is back focus? What problems does it cause for visual and photograp...

Back focus is the distance from the end of your eyepiece drawtube to the focal plane of your telescope. It varies greatly depending on the type of telescope:Schmidt-Cassegrain telescopes (SCTs)...

I’m doing photography with an eyepiece, using my camera with and without...

The afocal photographic method uses an eyepiece projecting through the camera’s lens and can be used with fixed lens (point and shoot) as well as removable lens (SLR) cameras.For afocal...

I’m doing photography with an eyepiece, using my camera with and without...

The afocal photographic method uses an eyepiece projecting through the camera’s lens and can be used with fixed lens (point and shoot) as well as removable lens (SLR) cameras.For afocal...

How much magnification and true field of view does the NexImage camera h...

The approximate magnification of an astronomical imaging camera is equivalent to that of an eyepiece with the same focal length in millimeters as the camera’s film or chip diagonal size....

How much magnification and true field of view does the NexImage camera h...

The approximate magnification of an astronomical imaging camera is equivalent to that of an eyepiece with the same focal length in millimeters as the camera’s film or chip diagonal size....

My CGE mount will not move in the declination axis when attached to my S...

This is a known bug with the SBIG ST-7 camera. Please visit the Santa Barbara Instrument Group website for instructions on how to fix this problem. Updated 12/27/13

My CGE mount will not move in the declination axis when attached to my S...

This is a known bug with the SBIG ST-7 camera. Please visit the Santa Barbara Instrument Group website for instructions on how to fix this problem. Updated 12/27/13