ZWO ASI585MM-AIR Wireless Smart Mono Camera

Monochrome Sensitivity from the Sony IMX585 Sensor

At the heart of the ASI585MM-AIR is Sony's IMX585 monochrome CMOS sensor, a chip known for its high sensitivity and low read noise. With a 4K resolution of 3840 x 2160 and small 2.9µm pixels, this sensor is exceptionally well-suited for capturing fine details on the Moon and planets with short to medium focal length refractors and Newtonians. The absence of a Bayer matrix means every pixel contributes to the luminance signal, resulting in a sharper, more detailed image compared to a color sensor of the same resolution.

The Integrated AIR All-In-One System

The "AIR" designation signifies a complete reimagining of the camera's function. It’s not just a camera; it's the brain of your entire imaging rig. The integrated system provides dedicated ports to power and control your ZWO electronic filter wheel (EFW), electronic autofocuser (EAF), and a separate guide camera, all managed wirelessly through the ASIAIR app. This consolidation of hardware is the camera's defining feature, turning a complex multi-device setup into a single, elegant component.

Effortless Wireless Imaging Control

The built-in Wi-Fi antenna provides a robust connection to your smartphone or tablet, giving you complete control over your imaging session from anywhere with a signal. You can handle polar alignment, plate solving, autofocus routines, sequence planning, and live image review without ever touching a cable connected to a laptop. This is a significant advantage for backyard observers who want to monitor progress from indoors or for anyone seeking to minimize setup time and complexity at a dark site.

12-Bit ADC for Smooth Gradations

The camera's 12-bit analog-to-digital converter (ADC) captures image data with 4,096 tonal levels per pixel. This bit depth provides the necessary dynamic range to capture smooth gradients in faint nebulae and subtle brightness variations in planetary atmospheres. When stretching deep-sky images in post-processing, this data depth helps prevent banding and ensures a more natural-looking final result.

Zero Amp Glow for Cleaner Data

ZWO has engineered the ASI585MM-AIR with circuitry that completely eliminates amplifier glow, a common artifact that appears as a faint brightening on the edge of long-exposure frames. This is not a software subtraction but a hardware-level solution. The practical benefit is cleaner, more uniform raw frames that require less calibration, saving you time in processing and producing a higher quality final image, especially on faint targets requiring long sub-exposures.

Passive Cooling for Noise Reduction

While the ASI585MM-AIR does not feature active thermoelectric cooling, it includes a passive cooling system that uses a thermal pad to transfer heat from the sensor to the camera's metal housing. This design helps reduce the buildup of thermal noise during an imaging session, particularly for deep-sky work. The trade-off is that it cannot maintain a setpoint temperature like a "Pro" model, so taking fresh dark frames for each session is recommended for optimal results.

High-Speed USB 3.0 for Planetary Imaging

When high frame rates are essential for "lucky imaging" of the Moon and planets, the USB 3.0 port provides the necessary bandwidth. It can deliver up to 47 frames per second at full 4K resolution. This speed allows you to capture thousands of frames in a short period, increasing the chances of catching moments of steady seeing that can be stacked into a single, sharp final image.

Protective AR Window for Maximum Transmission

The sensor is protected by an anti-reflection (AR) coated window that ensures maximum light gets to the sensor while preventing dust from settling on it. This coating is optimized to transmit all visible and near-infrared wavelengths, preserving the sensor's native high sensitivity across the spectrum. For monochrome imaging, this means you can capture strong signals whether you are shooting luminance, narrowband, or IR-pass filters.

Imagine targeting the Clavius region on the Moon with a 6-inch Maksutov-Cassegrain. With the ASI585MM-AIR, you can stream high-speed video wirelessly to your tablet, adjusting gain and exposure in real time as atmospheric seeing shifts. The 2.9µm pixels resolve the crater's fine inner ring of craterlets, and because of the monochrome sensor's sensitivity, you can use an infrared-pass filter to steady the view and darken the lunar sky, making the tiny details pop with startling clarity.