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The SBIG ST-I Planet adds features unavailable anywhere else in a camera of this size and price. The ST-I is a low cost, high performing, small camera that works as an excellent autoguider and planetary imager. The body is lightweight and no larger than many 1.25″ eyepieces. The STI it includes a built-in mechanical shutter for automatic dark frames which improves sensitivity by eliminating “hot pixels” and other image artifacts.
The SBIG ST-I Spectrograph attaches to the ST-I camera, turning it into a low-cost spectrograph.