QHY268M PH The QHY268M PH is a cooled monochrome astronomy camera using SONY IMX571. The APS-C IMX571 sensor provides 26-megapixel capture, with separate photographic, high-gain and extended-full-well readout modes. QHY lists 51 ke standard full well and 80 ke in extended-full-well mode. The current short-front version uses 14.5 mm backfocus; older 17.5…
Manufacturer model: QHY268M PH · Specifications checked against manufacturer data on 2026-11-03
The QHY268M PH is a cooled monochrome astronomy camera using SONY IMX571. The APS-C IMX571 sensor provides 26-megapixel capture, with separate photographic, high-gain and extended-full-well readout modes. QHY lists 51 ke standard full well and 80 ke in extended-full-well mode. The current short-front version uses 14.5 mm backfocus; older 17.5 mm plus CAA assemblies are a different mechanical configuration.
Sensor readout and image transfer
QHY’s published ADC specification is Native 16-bit (0-65535 greyscale) A/D. A 1GB 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:; – Long exposures (> 1 second) typically -35℃ below ambient; – Short exposure (< 1second) high FPS, typically -30℃ below ambient（Test temperature +20℃）. Cooling reduces thermal signal during long exposures, and performance depends on ambient conditions and capture rate. The camera has a protective-window heater and an internal humidity sensor.
Optical connections
The listed interface is Support M54 or M48 (Combined with adapters ), with backfocus of 14.5mm（±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. Manufacturer power-supply guidance: regulated 12 V supply capable of at least 4 A; original supplied adapter preferred 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
Humidity sensor
Yes
83338
Scheda tecnica
ADC e uscita
Native 16-bit (0-65535 greyscale) A/D
Bagliore dell'amplificatore
Zero Amplifier Glow
Riscaldatore anticondensa
Available
Back focus
14.5mm（±0.2）
Modalità colore
Monochrome
Interfaccia computer
USB3.0
Software di controllo
QHY All-in-One drivers/SDK; compatible ASCOM and capture software such as NINA, SharpCap and EZCAP_QT
Raffreddamento
Dual Stage TEC cooler:; – Long exposures (＞ 1 second) typically -35℃ below ambient; – Short exposure (＜ 1second) high FPS, typically -30℃ below ambient（Test temperature +20℃）
QHY268M PH The QHY268M PH is a cooled monochrome astronomy camera using SONY IMX571. The APS-C IMX571 sensor provides 26-megapixel capture, with separate photographic, high-gain and extended-full-well readout modes. QHY lists 51 ke standard full well and 80 ke in extended-full-well mode. The current short-front version uses 14.5 mm backfocus; older 17.5…
Manufacturer model: QHY268M PH · Specifications checked against manufacturer data on 2026-11-03
