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SkyEye24AC Plus
The SkyEye Plus series evolves ToupTek Astro’s flagship cooled-camera platform
with a redesigned structure, stronger cooling, expanded connectivity
and greater operating stability.
Powered by the Sony IMX410C full-frame sensor, the SkyEye24AC Plus delivers 24MP resolution, large 5.94μm pixels, and a 14-bit ADC for outstanding light-gathering capability and low-noise performance.
Featuring a two-stage TEC cooling system with up to 40°C reduction below ambient temperature, ultra-low read noise, zero amp-glow technology, and a 512MB DDR3 buffer, it captures clean, high-quality deep-sky images with remarkable consistency.
Designed for wide-field astrophotography, the SkyEye24AC Plus combines the benefits of a full-frame sensor with an efficient and streamlined imaging workflow.
- Sensor
- IMX410 Color
- Sensor Size
- 36.02×23.998mm
- Resolution
- 6064×4040
- Pixel Size
- 5.94μm
- Bit Depth (ADC)
- 14bit
- Data Interface
- USB3.0/2.0
- Dynamic Range
- 87.3 dB
- Maximum Frame Rate
- 113.0fps
- Quantum Efficiency
- >80%
- Full Well Capacity
- 104ke⁻ (20ke⁻in HCG)
- Maximum SNR
- 50.2 dB
- Read Noise
- 4.48–1.95e⁻ (LCG) / 0.68–0.3e⁻ (HCG)
- DDR3 Buffer
- 512MB
- TEC Cooling
- -35°C / -40°C
- Camera Weight
- 0.785kg
- Back Focus
- 17.5/12.5mm
Core Highlights
- Sony IMX410 Full-Frame Sensor
- Dual-stage TEC + PID Upgraded Cooling Up to -40°C Delta
- Expanded Front Window Reduced Vignetting
- High-Speed Data Transfer
- Built-in Sensor Tilt Adjustment
- Expanded Connectivity
- Ultra-Short Camera Back Focus Broad Accessory Compatibility
Expanded Connectivity and Reinforced Power
The integrated 5-port USB hub (4×USB 2.0, 1×USB 3.0) allows direct connection of accessories such as filter wheels, guide cameras, and focusers, reducing cable clutter and simplifying setup.
The optimized power system maintains stable camera operation during continuous cooling and high accessory loads throughout an imaging session.
Note: The SkyEye Plus camera body can operate from a 12V/3A supply. A DC 12V/5A supply is strongly recommended when using the USB hub. USB 3.0 is used only for high-speed data transfer and does not power the camera or connected accessories.
Built-in Sensor Tilt Adjustment and Convenient Calibration
The SkyEye Plus body includes three sets of precision adjustment screws, allowing the sensor plane to be aligned with the telescope focal plane without an additional accessory for more uniform stars across the field.
- Push screw: turn clockwise to increase the gap between the sensor-tilt ring and the camera.
- Pull screw: turn clockwise to reduce the gap between the sensor-tilt ring and the camera.
Note: Avoid large adjustments. Loosen the opposing screw before turning any adjustment screw. For example, loosen the matching push screw counterclockwise before tightening a pull screw clockwise; otherwise, the mechanism may be damaged.
The series also supports the SkyEye rear four-point sensor tilt ring. The replacement does not consume additional optical length and retains the standard 12.5mm/17.5mm back focus.
Shorter Back Focus and Flexible Adaptation
Every model uses an M54×0.75 female thread and includes a full-size M54 extension tube and adapter ring for a standard 55mm optical train. Removing the front adapters reduces the camera back focus to 12.5mm or 8.5mm for greater compatibility with optical systems and accessories.
- 17.5mm back focus: M54×0.75 female thread plus six M2.5 accessory mounting holes.
- 12.5mm back focus: M54×0.75 female thread plus six M2.5 accessory mounting holes.
- 8.5mm camera-body back focus: sensor-tilt screw holes, without an M54 mounting thread.
Full frame·High pixels·Large field of view
SkyEye24AC Plus is equipped with Sony IMX410 full-frame color sensor, with 24 million effective pixels and 5.94μm large pixels, achieving an excellent balance between light sensitivity and image quality. Large pixels bring higher full well capacity and better single-pixel photosensitivity, making it easy to connect to a short-focus telescope for quick sky surveys or a long-focus telescope to photograph nebulae, galaxies and other targets.
Powerful Cooling and Lower Dark Current
SkyEye24AC Plus adopts a newly upgraded TEC and active cooling system, combined with PID precise temperature control algorithm, which makes the temperature control more uniform. At the same time, the cooling temperature difference further breaks through to about 40°C, effectively suppressing thermal noise and dark current. When shooting all night long, the long exposure dark field is pure and transparent, and higher quality images can be obtained after calibration.
Expanded Front Window and Reduced Vignetting
The sensor window on full-frame SkyEye Plus models expands from 39×27mm to 43×31mm, increasing the area by 26%. The larger clear aperture reduces edge vignetting caused by the protective-window opening, particularly with large-image-circle correctors that have short back focus and with other fast optical systems.
Monochrome models use a double-sided AR-coated protective window. Color models include an IR-cut window to reduce infrared interference in color imaging.
Four-Level Anti-Dew Heating
The sealed, dry sensor chamber helps prevent condensation on the CMOS sensor and the inner surface of the optical window during cooling. An integrated window heater provides four adjustable power levels to keep the optical path clear in humid conditions and across large temperature changes.
Zero Amp-Glow for Cleaner Long Exposures
SkyEye24AC Plus uses Sony's back-illuminated non-glow CMOS sensor, which effectively avoids the common glow problem of traditional front-illuminated sensors and maintains a uniform and clean background signal under high gain and long exposure conditions. Calibration is easier and post-processing is more efficient.
USB 3.0 & DDR3 512MB
High-Speed Buffer, Stable Transfer, No Dropped Frames
SkyEye24AC Plus supports USB 3.0 transmission and has a built-in DDR3 512MB cache to ensure reliable data transmission. At the same time, the cache can also greatly avoid the glow phenomenon caused by slow transmission speed, ensuring smooth shooting.
High Dynamic Range, Full Well and Quantum Efficiency
- Native High-Bit-Depth ADC: SkyEye24AC Plus is equipped with 14bit ADC, with natural colors and delicate levels.
- High sensitivity & high QE: The peak quantum efficiency is >80%, the spectral response is wider, the light sensitivity is more sensitive, and the ability to capture weak light signals is greatly improved.
Camera Performance Curves
SkyEye24AC Plus supports the selection of LCG low gain mode, HCG high gain mode and low noise mode, which can be as low as 0.3e⁻ (HCG mode is turned on and the maximum gain is set).
HCG mode: Setting high gain can effectively reduce readout noise and provide excellent high dynamic performance, suitable for shooting dim targets.
LCG mode: Setting low gain can expand the full well capacity, effectively prevent overexposure of the picture, retain more details, and is suitable for shooting bright targets.
Low noise mode: Reduce the frame rate to obtain lower readout noise while maintaining a high dynamic range, further restoring the true brightness and color changes of celestial objects.
Dimensions and Interfaces
Back-Focus Configurations
Package Contents
Note: A power adapter is not included with SkyEye Plus cameras. If required, choose the optional high-quality Huntkey 12V/5A adapter. When purchasing separately, use a reputable adapter brand such as Huntkey or Mean Well.