天文镜筒
天文配件
赤道仪及脚架附件
目镜或巴罗
双筒望远镜
单筒望远镜
投币望远镜
摄影望远镜
天文望远镜整机
夜视仪
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数字天象仪
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天文配件
ALTA系列  技术参数
Camera System Performance Overview
PC Interface USB 2.0
Cable Length Standard: 5 meters (16.5 ft) (included)
Max. Cable Length (USB) 5 meters between hubs; 5 hubs maximum (max. total of 30m). Extenders available.
Digital Resolution 16 bits at 1 MHz (except U9000X, 16 bits at 1.8 MHz) and 12 bits at 5 MHz
Exposure Time 30 milliseconds to 183 minutes (2.56 microsecond increments)
Image Sequencing 1 to 65535 image sequences under software control
Frame Sizes Full frame, subframe, focus mode
Cooling for CCD Thermoelectric (Peltier) cooler
Temperature Stability ?0.1癈
Camera Head Size For details see Alta Mechanical
Mounting 3.5 or 5.125" bolt circle. Optional Nikon F-mount or Canon FD mount.
Operating Environment -22?to 27癈. Relative humidity: 10 to 90% non-condensing.
Power 40W maximum power with shutter open and cooling maximum. AC/DC "brick" supply with int'l AC input plug (100-240V, 50-60 Hz) included. Alternate 12V input from user's source.
Shutter (by housing) D01: Vincent 25mm; D02: Melles Griot 43mm; D07, D09: Melles Griot 63mm. D10: Vincent 90mm.
Remote Triggering LVTTL input allows exposure to start within 25 microseconds of rising edge of trigger
Warranty Two years, parts and labor. Lifetime guarantee against condensation inside the camera head.
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