The ToupTek G3M678M is a versatile and high-performance camera designed for astrophotography enthusiasts. Whether you’re capturing detailed images of the Moon, planets, or using it as a guide camera for deep-sky imaging, the G3M678M offers a range of features that cater to both beginners and seasoned astronomers.
Overview
The G3M678M is a monochrome camera equipped with the Sony IMX678 CMOS sensor. This sensor is known for its high sensitivity and low noise, making it ideal for capturing fine details in celestial objects. The camera supports high frame rates, essential for planetary imaging, and features a compact design compatible with various telescope setups.
High frame rate performance
One of the standout features of the G3M678M is its ability to capture high frame rates. At full resolution, it achieves 47 frames per second (fps), which is beneficial for capturing dynamic events on planetary surfaces. In Region of Interest (ROI) mode, where only a portion of the sensor is read out, the camera can reach up to 1500 fps at 8-bit and 3840×40 resolution. This capability is handy for solar imaging and capturing fleeting moments like planetary transits.
Enhanced light sensitivity
The G3M678M exhibits high sensitivity in the near-infrared (NIR) band, ranging from 700nm to 1100nm. When paired with an 850nm IR pass filter or an 890nm methane filter, the camera demonstrates enhanced stability and resistance to atmospheric disturbances. This feature expands the infrared imaging capabilities for solar, lunar, and planetary photography.
STARVIS 2 technology
The camera utilizes Sony’s STARVIS 2 image sensor technology, offering a broader light sensitivity response range and enhanced dynamic performance. This technology significantly improves imaging capabilities in low-light environments, particularly in the infrared spectrum. With lower dark current and readout noise, the camera maintains a high signal-to-noise ratio and excellent clarity when capturing high-contrast subjects.
Built-in 512MB DDR3 cache
To ensure smooth data transfer and reduce the risk of frame drops, the G3M678M is equipped with a 512MB DDR3 memory buffer. This feature is particularly beneficial during high-frame-rate video capture sessions, as it helps maintain data integrity and minimizes the amp-glow effect that can occur during long exposures.
High Conversion Gain (HCG) mode
The camera supports switching between High Conversion Gain (HCG) and Low Conversion Gain (LCG) modes. In HCG mode, setting a high gain effectively reduces readout noise while maintaining a wide dynamic range. When switched to HCG mode, the readout noise can achieve as low as 0.5e-, and the dynamic range remains close to 12 stops. This feature enhances the camera’s ability to capture faint light signals while preserving details in both bright and dark areas.
Compatibility and design
The G3M678M features a highly compatible front-end design. Its extended front end allows for easy connection to telescopes using a 1.25-inch extension tube. It can accommodate 1.25-inch mounted filters and is compatible with CS interface lenses. Additionally, with the installation of a 5mm adapter, it can also connect to C interface lenses.
Use cases
The G3M678M is well-suited for:
- Solar Imaging: Its high frame rate and sensitivity make it ideal for capturing detailed solar phenomena.
- Lunar and Planetary Imaging: The camera’s resolution and low noise characteristics allow for high-quality imaging of the Moon and planets.
- Autoguiding: With its ST-4 port and compact design, it serves effectively as a guide camera in astrophotography setups.
Key specifications
- Sensor: Sony IMX678 Monochrome CMOS
- Resolution: 3840 x 2160 pixels (8.3 megapixels)
- Pixel Size: 2.0 µm
- Sensor Size: 7.7 mm x 4.3 mm (1/1.8″)
- Frame Rate: 47 fps at full resolution; up to 1500 fps in ROI mode
- Interface: USB 3.0 and ST-4 port
- Compatibility: Windows, Mac, Linux
- Dimensions: Ø 37 mm; Length 87.4 mm
- Back Focus: 12.5 mm
Price and availability
ToupTek G3M678M is available for $299 from its official website.
The ToupTek G3M678M stands out as a versatile and high-performance camera for astrophotography. Its combination of high sensitivity, low noise, and compatibility with various software and hardware makes it a valuable tool for both planetary imaging and autoguiding. Whether you’re a beginner looking to delve into astrophotography or an experienced astronomer seeking a reliable camera, the G3M678M offers features that cater to a wide range of imaging needs.
Clear skies!
