QHYCCD 268C-PH Camera: Advanced Imaging with CMOS Technology

Key Features:

Cutting-Edge CMOS Sensor: The QHY268M/C features a new generation back-illuminated CMOS sensor, offering low readout noise and high-speed readout for superior astronomical imaging.
High-Resolution and Sensitivity: Equipped with a Sony IMX571 sensor, this camera delivers true 16-bit A/D conversion and 3.76um pixels, ensuring detailed and high-quality images.
Amplifier Glow Free: The QHY268M/C stands out as an amplifier glow-free camera, a significant advantage for capturing clear night sky images.
Large Image Buffer: Comes with a 1GB DDR3 image buffer to handle the high data throughput of the 26MP sensor, ensuring smooth and uninterrupted image capture.
Humidity Sensor in QHY268M: The QHY268M model includes an internal humidity sensor for monitoring conditions, a feature not available in the QHY268C variant.
Backside Illumination (BSI) Technology: Improved full well capacity due to the BSI structure, enhancing the sensor's efficiency in converting photons to electrons.
True RAW Data Output: QHY Cameras provide authentic RAW image output, maximizing flexibility for post-acquisition processing without the common drawbacks found in DSLR implementations.
Effective Cooling and Anti-Dew Control: Dual-stage TE cooling and proprietary technology control dark current noise, with a built-in dew heater and sealed chamber to prevent internal humidity condensation.
Professional Sealing Technology: Drawing on nearly 20 years of cooled camera design experience, the camera features a silicon gel tube socket for humidity control, ensuring no oil leakage.
Multiple Readout Modes: Specialized readout modes for QHY 16-bit Cameras, offering varied performance to suit different imaging requirements.
Thermal Noise Suppression: Innovative technology significantly reduces fixed-position thermal noise, characteristic of back-illuminated CMOS cameras.
UVLO Protection and USB Traffic Optimization: Protects against low voltage damage and minimizes horizontal banding in images through USB traffic adjustment.
Remote Reboot Feature: The camera can be rebooted remotely by controlling the +12V power supply, ideal for observatory setups.
Multiple Readout Modes with Enhanced Performance: Includes Photographic, High Gain, Extended Full Well, and 2CMS modes, each offering distinct advantages for astrophotography.
ASCOM, SharpCap, and N.I.N.A Support: The readout modes are supported in various software, allowing for versatile imaging options and settings.

Specifications

Model	QHY268M	QHY268C
CMOS Sensor	SONY IMX571 M	SONY IMX571 C
Mono/Color	Mono	Color
FSI/BSI	BSI
Pixel Size	3.76um x 3.76um
Effective Pixel Area	6280*4210 (includes the optically black area and overscan area)
Effective Pixels	26MP
Sensor Size	APS-C
A/D Sample Depth	Native 16-bit (0-65535 greyscale) A/D
Full Well Capacity (1×1, 2×2, 3×3)	51ke- 75ke- or above in extended full well mode
Full Frame Rate	USB3.0 Port: Full Resolution 6.8FPS @8BIT 6FPS @16BIT 2048lines 13.6FPS @8BIT 11.5FPS@16BIT 1080lines 25.4FPS @8BIT 19.5FPS@16BIT 768lines 35FPS @8BIT 25FPS@16BIT 480lines 50FPS @8BIT 34FPS@16BIT
Readout Noise	1.1e- High Gain, 3.5e- Low Gain (5.3e- to 7.4e- in extended full well mode)
Dark Current	-20C，0.0005e /pixel/sec -10C，0.001e /pixel/sec
Exposure Time Range	30us-3600sec
Recommend Gain*	30 (PH Mode， or Extended Full Well Mode) 56 (High Gain Mode) *With the improvement of the CMOS technology, For these 16bit CMOS cameras, even in the lowest gain it has beyond the requirement of unit gain (less than 1e/ADU due to sufficient samples). Learn more at the “Readout Modes” part of this page.
Amp Control	Zero Amplifier Glow
Firmware/FPGA remote Upgrade	Fully support via Camera USB port
Shutter Type	Electronic Shutter
Computer Interface	USB3.0
Built-in Image Buffer	1GByte DDR3 Memory
Cooling System	Two-stage TEC cooler Less than 1S lower than ambient temperature -30C in continuous mode More than 1S continuous mode or lower than ambient temperature -35C in single frame mode （Test temperature +20°）
Optic Window Type	AR+AR High-Quality Multi-Layer Anti-Reflection Coating
Anti-Dew Heater	Yes
Humidity Sensor*	Yes	No
Telescope Interface	Support M54 or M48 (Combined with adapters )	Support M54 or M48 (Combined with adapters )
Back Focal Length	QHY268M: 12.5mm* *If companies with the QHY filter wheel, the BFL consumed is counted as 12.5mm. The actual BFL (the intercept from the CMOS chip to the top of the camera) is 14.3mm (±0.3). Since most users will match CFW with monochrome cams, please take 12.5mm as a major reference.	QHY268C: 14.3mm（±0.3）* *Since 2023, the top part of QHY268C is the same as 268M.
Weight	About 810g	About 810g

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