SBIG Test Lens for ST-7/8/9/10/2000 CCD Cameras.
This inexpensive test lens allows the user to become familiar with CCD Camera operation and software in the comfort of his home, without a telescope. Daylight is too bright and rooms with windows open to bright daylight will saturate the CCD. It is therefore best to close any curtains and use only artificial light when testing. If one just sets the camera-lens combination outside on the ground looking up, images of the constellations can be taken up to 10 seconds long before the earth''''s'' rotation elongates the image. Stars down to the 6th magnitude will be recorded. This lens will be included in all new CCD Cameras from SBIG.