QHY294M Pro The QHY294M Pro is a cooled monochrome astronomy camera using SONY IMX492. This monochrome IMX492 camera provides two distinct sampling modes: standard 11.7 MP at 4.63 µm and 14-bit ADC, or unlocked approximately 46.8 MP at 2.315 µm and 12-bit ADC. Changing mode also changes full well, read noise and frame rate; values from the two modes must…
Manufacturer model: QHY294M Pro · Specifications checked against manufacturer data on 2026-11-03
The QHY294M Pro is a cooled monochrome astronomy camera using SONY IMX492. This monochrome IMX492 camera provides two distinct sampling modes: standard 11.7 MP at 4.63 µm and 14-bit ADC, or unlocked approximately 46.8 MP at 2.315 µm and 12-bit ADC. Changing mode also changes full well, read noise and frame rate; values from the two modes must be compared separately.
Sensor readout and image transfer
QHY’s published ADC specification is 14-bit A/D. A 256MB DDR3 Memory Buffer image buffer supports downloads through USB3.0. Monochrome capture supports separate luminance, RGB and narrowband filter exposures. Full-frame and region-of-interest rates depend on readout mode and output format; the table below preserves those conditions.
Cooling and dew control
Manufacturer cooling specification: Dual Stage TEC cooler（about -35℃ below ambient, test temperature +20℃）. Cooling reduces thermal signal during long exposures, and performance depends on ambient conditions and capture rate. The camera has the manufacturer-listed dew-control provisions shown in the table.
Optical connections
The listed interface is M42/0.75, with backfocus of 17.5mm（±0.2）. Add the optical contribution of the selected adapters, filter wheel and guider when planning the telescope connection.
Power and software
Use an external 12 V supply before connecting the USB data cable. QHY’s operating guide specifies 11–13.8 V at the camera; cable voltage drop must be included in the power budget. Use the manufacturer-specified power adapter. Install the matching QHY All-in-One driver/SDK and compatible capture software.
Use the named-model manufacturer connection diagram and the backfocus reference for the selected adapter. Readout mode and output format affect frame rate, noise and full-well capacity.
Additional specifications
Standard sampling mode
11.7 MP; 4164 × 2796 pixels; 4.63 µm; 14-bit ADC
Unlocked sampling mode
46.8 MP nominal; 2.315 µm; 12-bit ADC according to manufacturer mode overview
Unlocked frame rate note
The manufacturer table separately prints 8340 × 5644 at 4 fps; the mode overview specifies 12-bit ADC for unlocked mode. These are retained as distinct published statements, not a 14-bit unlocked-mode guarantee.
85058
Technische Daten
ADC und Ausgang
14-bit A/D
Verstärkerglühen
Amplifier Glow Can be reduced during long exposure
Antitau-Heizung
Available
Backfokus
17.5mm（±0.2）
Farbmodus
Monochrome
Computerschnittstelle
USB3.0
Steuerungssoftware
QHY All-in-One drivers/SDK; compatible ASCOM and capture software such as NINA, SharpCap and EZCAP_QT
Kühlung
Dual Stage TEC cooler（about -35℃ below ambient, test temperature +20℃）
Dunkelstrom
0.002e-/pixel/sec @-20℃; 0.005e-/pixel/sec @-10℃
Effektive Pixelfläche
4164*2796
Effektive Pixel
11.7 MP; 46.8 MP（Extended Pixel Mode）
Belichtungszeitbereich
60μs-3600sec
Bildraten
Standard 11.7 MP mode: 16.5 fps at 14-bit; smaller ROI increases speed; see manufacturer mode table
Full-Well-Kapazität 1×1 / 2×2 / 3×3
65ke-
Bildspeicher
256MB DDR3 Memory Buffer
Modell
QHY294M Pro
Optischer Anschluss
M42/0.75
Pixelgröße
4.63μm*4.63μm
Stromeingang
12 V DC external supply; manufacturer guide specifies 11–13.8 V at the camera
Einschaltreihenfolge
Connect 12 V power before USB; use a short, low-resistance power cable
Schutzfenster
AR+AR High Quality Multi-Layer Anti-Reflection Coating
Ausleserauschen
1.6- to 1.2e- (High Gain Mode); 6.9- to 5.2e- (Low Gain Mode)
Empfohlener Gain
1600 (11MP Mode); 2600 (47MP Mode)
Sensor
SONY IMX492
Sensorbelichtung
BSI
Sensorgröße
4/3 inch (19.28mm*12.95mm)
Verschluss
Electronic Rolling Shutter
Gewicht
650g
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QHY294M Pro The QHY294M Pro is a cooled monochrome astronomy camera using SONY IMX492. This monochrome IMX492 camera provides two distinct sampling modes: standard 11.7 MP at 4.63 µm and 14-bit ADC, or unlocked approximately 46.8 MP at 2.315 µm and 12-bit ADC. Changing mode also changes full well, read noise and frame rate; values from the two modes must…
Manufacturer model: QHY294M Pro · Specifications checked against manufacturer data on 2026-11-03
