ZWO ASI461MM Pro The ASI461MM Pro is a cooled monochrome astronomy camera using the Sony IMX461 sensor. Its 43.856 × 32.9 mm imaging area records 11656 × 8750 pixels with 3.76 µm pixels and a native 16-bit ADC.
Manufacturer model: ZWO ASI461MM Pro · Specifications checked against manufacturer data on 2026-11-03
The ASI461MM Pro is a cooled monochrome astronomy camera using the Sony IMX461 sensor. Its 43.856 × 32.9 mm imaging area records 11656 × 8750 pixels with 3.76 µm pixels and a native 16-bit ADC.
Imaging performance
ZWO specifies 50,300 electrons full-well capacity, peak quantum efficiency of 91% and read noise of 1.0–3.3 (0.9 at 46 dB gain) electrons. The listed capture rate is 3.77 fps advertised maximum; 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 M68 × 1, with sensor spacing of 17.5 mm bare; 22.5 mm with 5 mm tilt plate. The protective window is 79.3 × 4 mm 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.
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
Bin2 pixel size (µm)
7.5
Bin2 full well (e⁻)
198000
84704
Fiche technique
CAN (bits)
16
Amp glow
Zero amp glow
Plage de tension batterie
11–14 V
Dimensions du boîtier
106 mm diameter × 103 mm
Mémoire tampon
512 MB DDR3
Filetage caméra
M68 × 1
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⁻)
50300
Interface
USB 3.0; USB 2.0 compatible
Cadence maximale
3.77 fps advertised maximum
Humidité de fonctionnement
20–80%
Température de fonctionnement
−5 to 50 °C
QE max. (%)
91
Taille des pixels (µm)
3.76
Alimentation
12 V DC, 3–5 A recommended; 5.5 × 2.1 mm centre positive
Fenêtre de protection
79.3 × 4 mm AR-coated window
Bruit de lecture (e⁻)
1.0–3.3 (0.9 at 46 dB gain)
Résolution (px)
11656 × 8750
Capteur
Sony IMX461
Backfocus du capteur
17.5 mm bare; 22.5 mm with 5 mm tilt plate
Diagonale du capteur (mm)
54.8
Dimensions du capteur (mm)
43.856 × 32.9
Obturateur
Rolling shutter
Logiciel
Windows; Linux; macOS with compatible ZWO software/drivers
ZWO ASI461MM Pro The ASI461MM Pro is a cooled monochrome astronomy camera using the Sony IMX461 sensor. Its 43.856 × 32.9 mm imaging area records 11656 × 8750 pixels with 3.76 µm pixels and a native 16-bit ADC.
Manufacturer model: ZWO ASI461MM Pro · Specifications checked against manufacturer data on 2026-11-03
