QHYCCD QHY600C Color

The 61.17MP Full-Frame Sony IMX455 Sensor

At the heart of the QHY600C is the Sony IMX455, a back-illuminated (BSI) sensor that offers a massive 9576 x 6388 pixel array across a full 35mm format (36mm x 24mm). This enormous field of view allows you to frame entire nebula complexes, such as the full Cygnus Loop or the Andromeda Galaxy (M31), with room to spare using medium focal length instruments. The BSI architecture places the sensor's wiring below the photosensitive layer, maximizing the light-gathering area of each pixel for higher quantum efficiency.

The 3.76µm pixels provide an excellent balance of resolution and sensitivity, enabling you to resolve fine details in galactic dust lanes or planetary nebulae without needing excessively long focal lengths. This pixel size is well-suited for a wide range of modern refractors and reflectors, delivering high-resolution sampling that captures the full potential of your optics.

Native 16-bit A/D and 80ke- Full Well Capacity

The QHY600C features a true, on-chip 16-bit analog-to-digital converter. This allows the camera to distinguish 65,536 distinct levels of brightness, a massive leap from the 4,096 or 16,384 levels of older 12-bit and 14-bit cameras. With 16-bit A/D the system gain falls below 1e-/ADU with no sampling error noise, which gives smooth tonal gradations in faint nebulosity when you stretch your images.

To complement this dynamic range, the camera offers multiple readout modes to manage its full well capacity. In Standard Mode, the camera captures over 51,000 electrons per pixel, ideal for most deep-sky targets. For scenes with extremely bright stars and faint surrounding nebulosity, like the Orion Nebula (M42), you can activate the Super Full Well Mode, which expands the capacity to over 80,000 electrons. This prevents bright star cores from saturating, preserving color and detail across the entire dynamic range of the target.

1.0e- Read Noise and Multiple Readout Modes

The QHY600C keeps read noise low when signal is faint. In High Gain Mode, the read noise drops to an astonishingly low 1.0e-. This means a signal-to-noise ratio greater than 3 can be achieved with just a handful of photons, making the camera incredibly effective for narrowband imaging or capturing faint targets under light-polluted skies. This low-noise performance allows you to stack shorter sub-exposures while still building up a deep, clean final image.

QHYCCD provides several distinct readout modes to optimize performance for different astronomical targets. These modes are selectable in ASCOM, N.I.N.A., and SharpCap, allowing you to tailor the camera's behavior to your specific needs.

• Photographic Mode (Mode #0): The recommended mode for general deep-sky imaging, offering a balance of low noise and high dynamic range.
• High Gain Mode (Mode #1): Ideal for very faint objects or narrowband imaging, this mode achieves the lowest read noise of 1.0e-.
• Super Full Well Mode (Mode #2): Maximizes dynamic range by increasing the full well capacity to over 80,000 electrons, which helps with bright star fields or cores.
• 2CMS Modes: Based on the three basic modes, 2CMS uses secondary sampling to greatly reduce read noise while keeping the same full well and system gain, and QHYCCD prefers the 2CMS modes over the basic modes for astrophotography.

Zero Amp Glow and 0.0022e-/p/s Dark Current

Two of the most persistent issues in long-exposure CMOS imaging are amplifier glow and dark current. The QHY600C has zero amplifier glow, so raw frames do not show the corner glow that readout electronics cause in some CMOS cameras, and hardware control of dark current works alongside the dual-stage cooling. This means your images have a pristine, uniform background without the need for complex calibration to subtract this artifact.

Combined with its powerful cooling system, the QHY600C achieves an extremely low dark current of just 0.0022e- per pixel per second when cooled to -20°C. This minimal thermal signal ensures that your long exposures are not contaminated by noise, simplifying your calibration workflow and producing cleaner, deeper final images.

Dual-Stage TEC Cooling to -35°C Below Ambient

Effective thermal management is critical for clean, long-exposure astrophotography. The QHY600C uses a powerful, regulated dual-stage thermoelectric (TEC) cooling system capable of reducing the sensor's temperature to a typical -35°C below the ambient air temperature. This deep cooling is essential for minimizing the thermal noise (dark current) that accumulates during exposures, resulting in a significantly higher signal-to-noise ratio.

To ensure uninterrupted imaging sessions, especially on humid nights, the camera also features an integrated dew heater for the optical window. This heater gently warms the AR-coated glass to prevent frost or condensation from forming, which could otherwise ruin a night of imaging. The sensor chamber is kept dry by QHYCCD's silicon gel tube socket design, and the included desiccant tube can be connected to a port on the camera if moisture ever fogs the chamber.

2GB DDR3 Buffer for Drop-Free 2.5 FPS Imaging

A single 16-bit, 61.17-megapixel image contains a massive amount of data, approximately 120MB per frame. Transferring this data reliably requires more than just a fast interface. The QHY600C integrates a 2GB DDR3 image buffer that acts as a high-speed cache, temporarily storing frames before they are sent to your computer over the USB 3.0 connection. This buffer is crucial for preventing data loss and dropped frames, which can occur if the host computer is busy with other tasks or if the USB connection is momentarily interrupted.

This robust architecture ensures a smooth, consistent data stream, allowing you to confidently capture full-resolution 16-bit frames at up to 2.5 FPS. For applications requiring higher speeds you can define a Region of Interest (ROI) to dramatically increase the frame rate, reaching up to 160 FPS for a 9600x100 pixel area.

M54 Interface and 17.5mm Back Focus

The QHY600C-PH (Photographic) model is designed for straightforward integration into modern imaging trains. The specification table lists the telescope interface as M54 / M48 (with adapters). The box includes an M54 to 2" nosepiece and an adapter kit, so the camera can go straight into a 2" focuser or be threaded into an imaging train.

The back focal length of the PH and Pro models is 17.5mm plus the 6mm CAA, and 14.5mm for the short back focus (SBFL) model. These distances are planned to work with QHYCCD's filter wheels, off-axis guiders and adapter kits to reach the common 55mm back focus that many correctors require. The included adapters help achieve this common spacing, ensuring your stars are sharp from corner to corner across the massive full-frame sensor.

QHY600C (Color) vs. QHY600M (Monochrome): The One-Shot Advantage

The QHY600C is the one-shot color (OSC) version of this flagship camera series. It uses an RGGB Bayer matrix on the sensor (QHYCCD's Bayer table), allowing you to capture a full-color image in a single exposure. This offers significant advantages in simplicity and efficiency compared to its monochrome counterpart, the QHY600M.

• Simplicity and Speed: With an OSC camera, you do not need a filter wheel or separate LRGB filters. This reduces the weight and complexity of your imaging setup. You can begin capturing full-color data immediately,
• Ideal for Broadband Targets: The QHY600C excels at capturing broadband targets like galaxies and star clusters, where capturing all color data simultaneously is highly efficient. The workflow is much faster, from acquisition to a final processed image.
• Monochrome Trade-offs: The primary trade-off is that a monochrome camera paired with specialized narrowband filters (H-alpha, OIII, SII) will deliver higher-resolution and higher-contrast images of emission nebulae. While the QHY600C can be used with dual-band or tri-band narrowband filters, a monochrome sensor remains the better choice for dedicated narrowband imagers.

Unified Control with the QHYCCD All-In-One Driver Pack

QHYCCD simplifies camera control by providing a comprehensive All-In-One software package. This installer includes everything you need to operate the QHY600C with all major astrophotography software. You should install your preferred capture software (like N.I.N.A. or SharpCap) first, then run the All-In-One installer to ensure the correct plugins are deployed.

The pack contains the necessary system drivers, ASCOM drivers for universal compatibility, and dedicated SDKs for popular native-support applications like N.I.N.A. and SharpCap. Also included is QHYCCD's own capture software, EZCAP_QT, which is useful for testing camera functions and managing settings. This unified approach ensures a stable and reliable connection, letting you focus on imaging rather than troubleshooting drivers.

Stable 12V DC Power with UVLO Protection

A stable power supply is critical for the consistent performance of a cooled CMOS camera. The QHY600C requires a DC power source between 11V and 13.8V, with 12V being optimal. The camera includes a locking power cable to prevent accidental disconnection during an imaging session. It is important to use a power supply capable of delivering sufficient current, especially when the TEC cooler is running at high power.

To protect the camera's sensitive electronics from damage, the QHY600C features Under Voltage Locking (UVLO) protection. If the input voltage drops below 11V, the camera will automatically issue a warning and limit the cooler's power to prevent damage from long-term overload. This feature is particularly useful for remote observatories or field setups where power delivery can fluctuate, ensuring the longevity and reliability of your investment.