The ToupTek IMX 290C Guide Colour is a 1.25" barrel size guide camera using the Sony IMX290 CMOS sensor. With a quantum efficiency of >81%, read noise as low as 0.53e- and 2.9µm pixels, the IMX290C is an excellent guide camera for both short guide scopes and off-axis guiders. The IMX290C is equipped with USB 2.0 connectivity as well as a traditional ST-4 autoguiding interface. Its 1.25" barrel design makes it straightforward to use with most off-axis guiders (OAG not included). Available in anodized Red. Specifications Sensor CMOS Sony IMX290 colour Resolution 2 megapixels 1920 x 1080 Pixel size 2.9 µm Sensor size 5.57 mm x 3.13 mm (6.39 mm diagonal) Quantum efficiency >81% Exposure range 0.105 ms - 1000 s Read noise 0.53 e- Full well capacity 11,200 e- Bit rate 12 bit Speed 18 fps Shutter type Rolling shutter ROI Supported Compatibility Windows, Mac, Linux Protecting window AR coated Ports USB 2.0 + ST-4 Back focus 12.5 mm with CS adapter, 17.5 mm with C adapter Connections C/CS-mount, 1.25" barrel Dimensions Ø 35 mm; ↨ 62 mm Weight TBD Power supply USB 2.0 SKU TT-GPCMOS02000KPA Items included Camera body USB 2.0 cable ST-4 cable (2 metres) 1.25" extender Downloads ToupTek software and drivers