|The Starlight Xpress CoStar is a dual purpose camera that works well for guiding and planetary imaging. |
The CoStar is a monochromatic guider featuring a 1304 x 1024 array of small 5.2 micron pixels. These smaller pixels will yield better planetary resolution at the expense of some sensitivity for guiding. This is a fine dual purpose camera, but customers demanding the utmost sensitivity in an autoguider should opt for the Lodestar. Se the photographic comparisson below for further explanation.
A single raw 5 second Costar exposure through an F5 80mm aperture guide scope.
The same star field taken with the Lodestar, using the same scope and exposure time.
The Lodestar is clearly more sensitive, with less noise, but the CoStar still works very well as a guider and also makes an effective Lunar/Planetary camera.