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ST-2000XM Specifications CCD CCD Type: Kodak KAI-2001M (main CCD) + TI TC-237H (Texas Instruments; auto-guiding CCD) CCD Architecture: Full Frame Pixels Number of Pixels: 1600 x 1200, total: 1.92 million Pixel Sizes: 7.4 x 7.4 microns Array Dimensions: 11.8 x 8.9 mm Full Well Capacity: ~45,000 electrons (unbinned), ~90,000 electrons (binned) Binning Modes: 1 x 1, 2 x 2, 3 x 3, and 1 x N, 2 x N, 3 x N Operation Shutter: electromechanical Exposure: 0.01 to 3600 seconds, 10 ms resolution Full Frame Acquisition: ~4.5 seconds Cooling: Single Stage Thermoelectric, Active Fan with Water Assist -35° C from ambient typical without water -45° C from ambient typical with water 0.1° C resolution Dark Current: .35 electrons/second/pixel at 0° C Antiblooming: standard Guiding: Dual CCD Self-Guiding Electronics Read Noise: 15 electrons RMS A/D Converter: 16 bits (65,535 gray levels) A/D Gain: Unbinned = 0.72 electrons/ADU Binned = 1.4 electrons/ADU Misc. Camera Weight: 2.0 lbs. (0.9 kg) Head Mount Size: 1.25 inch or 2 inch