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SV305 astronomy camera solves the general astronomy camera problem: --Optimize pixel vignetting --slow frame when planet shooting --Storage frame rate is slow --No ROI function --Short exposure time Now SV305 astronomy camera meet the basic needs of astronomy enthusiasts for planetary photography. Come with 1.25 inch extension tube We design the 1.25 inch extension tube for SV305. And the extension tube is designed with the M28.5*6 filter threads. When you use the SV305 to capture planets in the city, you could add the light pollution filter so that you could get better image. 1800 seconds of exposure time In order to give customer the greatest astronomy experience, the SV305 support 30mins, 1800s exposure time. The longer exposure, the hotter the camera will be, and there will be more read noise on the image. So 1800s is enough Specification: Sensor: 1/2.8" CMOS SONY IMX290 Pixel Size: 2.9X2.9μm Resolution: 2 Mega Pixels 1920X1080 Shutter: Electronic Shutter Max FPS: 130fps（320*240） Video encoding format：RAW ADC: 12 bit ROI support: Any area ROI On camera image buffer: 128M DDR buffer Optic window: IR-cut filter Interface: USB 2.0 Net weight: 125g Material: Aluminum alloy Supported OS: Windows Power Consumption: 200mA@5V Working Temperature: -0°C~45°C Storage Temperature: -10°C~60°C Working Relative Humidity: 20%~80% Storage Relative Humidity: 20%~95% Package Includes: 1 X SV305 Astronomy Camera 1 X USB2.0 Cable 1 X 1.25”Extension tube 1 X C-lens adapter 1 X User manual 1 X Cleaning cloth