ZWO ASI294MM Pro The ASI294MM Pro is a cooled monochrome astronomy camera using the Sony IMX492 sensor. Its 19.1 × 13 mm imaging area records 8288 × 5644 pixels with 2.3 µm pixels and a native 12-bit ADC.
Manufacturer model: ZWO ASI294MM Pro · Specifications checked against manufacturer data on 2026-11-03
The ASI294MM Pro is a cooled monochrome astronomy camera using the Sony IMX492 sensor. Its 19.1 × 13 mm imaging area records 8288 × 5644 pixels with 2.3 µm pixels and a native 12-bit ADC.
Imaging performance
ZWO specifies 14,400 electrons full-well capacity, peak quantum efficiency of 90% and read noise of 1.3–2.6 (manufacturer table) electrons. The listed capture rate is 5.7 fps at unlocked Bin1; actual transfer speed depends on image size, ADC/output mode and USB connection. Monochrome imaging allows separate luminance, colour and narrowband exposures using suitable external filters.
Cooling and data transfer
Two-stage TEC cooling reduces thermal signal during long exposures. The manufacturer cooling specification is Two-stage TEC; 30–35 °C below ambient, tested at 30 °C ambient. A 512 MB DDR3 buffer and USB 3.0 connection support reliable downloads.
Connections and power
The camera connection is M42 × 0.75, with sensor spacing of 6.5 mm bare; adapter rings add spacing. The protective window is AR-coated window. Use a 12 V DC, 3–5 A supply with a 5.5 × 2.1 mm centre-positive connector; the recommended battery range is 11–14 V. Include adapters and any filter wheel when calculating telescope backfocus.
Two sampling modes
Unlocked Bin1 provides the highest pixel count at 2.3 µm and 12-bit ADC. Bin2 provides 4144 × 2822 sampling at approximately 4.6 µm, 14-bit ADC and approximately 66 ke full well. Resolution, bit depth and full well must be compared within the same mode.
Use the exact named-model manufacturer connection and operating instructions linked with this product. Optional parts and adapters require their specified spacing and power limits.
Additional specifications
Unlocked bin1
8288 × 5644; 2.3 µm; 12-bit ADC; 14.4 ke full well
Bin2
4144 × 2822; approximately 4.6 µm; 14-bit ADC; approximately 66 ke full well
68797
Fiche technique
CAN (bits)
12
Amp glow
Present; calibrate with matched dark frames
Plage de tension batterie
11–14 V
Mémoire tampon
512 MB DDR3
Filetage caméra
M42 × 0.75
Mode couleur
Monochrome
Refroidissement
Two-stage TEC; 30–35 °C below ambient, tested at 30 °C ambient
Plage d'exposition
32 µs–2000 s
Capacité de puits (e⁻)
14400
Gain HCG
120
Interface
USB 3.0; USB 2.0 compatible
Cadence maximale
5.7 fps at unlocked Bin1
QE max. (%)
90
Taille des pixels (µm)
2.3
Alimentation
12 V DC, 3–5 A recommended; 5.5 × 2.1 mm centre positive
Fenêtre de protection
AR-coated window
Bruit de lecture (e⁻)
1.3–2.6 (manufacturer table)
Résolution (px)
8288 × 5644
Capteur
Sony IMX492
Backfocus du capteur
6.5 mm bare; adapter rings add spacing
Dimensions du capteur (mm)
19.1 × 13
Format du capteur
Four Thirds
Obturateur
Rolling shutter
Logiciel
Windows; Linux; macOS with compatible ZWO software/drivers
Poids (g)
410
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ZWO ASI294MM Pro The ASI294MM Pro is a cooled monochrome astronomy camera using the Sony IMX492 sensor. Its 19.1 × 13 mm imaging area records 8288 × 5644 pixels with 2.3 µm pixels and a native 12-bit ADC.
Manufacturer model: ZWO ASI294MM Pro · Specifications checked against manufacturer data on 2026-11-03
