ZWO ASI585MC Color

4K Planetary Imaging at 46.9 FPS

The ASI585MC's native 3840 x 2160 resolution is ideal for capturing the entire disk of Jupiter or the Moon in a single frame, eliminating the need for mosaics. The high 46.9 FPS frame rate allows you to collect thousands of frames in minutes, letting software stack the sharpest data from moments of steady seeing. This high-speed capture is stabilized by the onboard 256MB DDR3 memory buffer, preventing data loss during transfer to your computer.

91% QE and 40ke Full Well for Deep-Sky Imaging

With a peak QE of 91% and a deep 40ke full well capacity, the back-illuminated IMX585 sensor gathers photons with extreme efficiency and offers significant dynamic range. This combination is critical for "lucky imaging" of brighter deep-sky objects like the Orion Nebula (M42) or the Hercules Cluster (M13). You can use short exposures to freeze atmospheric turbulence while still capturing both faint nebulosity and the bright stellar cores without saturation.

ASI585MC vs. ASI485MC: Key Upgrades

The ASI585MC is a direct successor to the popular ASI485MC, incorporating two critical improvements for astrophotography. While the ASI485MC has a limited full well depth and exhibits amp glow on longer exposures, the ASI585MC addresses both limitations directly.

• Full Well Capacity (40ke): The ASI585MC's full well is over three times deeper than the ASI485MC's. This provides substantially greater dynamic range, preventing bright stars from saturating in deep-sky images and capturing more subtle color variations on planets.
• Zero Amp Glow: ZWO integrated a hardware-level circuit that completely eliminates amplifier glow, a common source of noise in uncooled cameras during long exposures. This makes dark frame calibration simpler and far more effective.

Zero Amp Glow on an Uncooled Sensor

Amplifier glow is a faint infrared light source on the sensor itself that can contaminate long exposures. The ASI585MC's Zero Amp Glow circuit prevents this entirely, regardless of exposure length or gain setting. As an uncooled camera, it is still subject to thermal noise on multi-minute exposures of faint targets. However, the absence of amp glow means your dark frames only need to subtract this predictable thermal signal, resulting in cleaner, easier-to-process images.

Flexible Connectivity with 6.5mm / 17.5mm Back Focus

The ASI585MC provides two native back focus distances to accommodate different imaging trains. The standard 17.5mm distance is used when placing accessories like a filter wheel or off-axis guider in front of the camera. For setups without these accessories, a 6.5mm distance allows for a more direct connection, which can be critical when working with certain focal reducers or lens adapters.

• Telescope Interface: M42x0.75 female threads.
• Included Adapters: A 1.25" nosepiece allows direct insertion into standard focusers.
• Data and Guiding: A USB 3.0 port handles high-speed image transfer, while a dedicated ST-4 port connects to your mount for autoguiding.