ZWO ASI183GT Mono

Integrated 5-Position Filter Wheel for LRGB & Narrowband

The core of the ASI183GT is its internal, motor-driven 5-position filter wheel, which eliminates the need for a separate external wheel and additional cables. This integrated design reduces weight, potential flexure, and simplifies your imaging train. The wheel accepts standard 1.25" mounted or 31mm unmounted filters, allowing you to load LRGB and narrowband filters (like Ha, OIII, and SII) for capturing full-color and scientific data in a single session without disturbing your setup.

20.18 Megapixels at 2.4µm: High-Resolution Deep Sky

With a resolution of 5496x3672, the ASI183GT's back-illuminated Sony sensor delivers an immense field of view packed with detail. The small 2.4µm pixels provide excellent sampling for telescopes with focal lengths from 400mm to 800mm, rendering sharp, pinpoint stars and resolving fine structures within targets like the Whirlpool Galaxy (M51) or the Dumbbell Nebula (M27). The sensor's 84% peak quantum efficiency and low 1.6e read noise mean that more of the light you collect is converted into usable signal, revealing fainter structures with less noise.

ASI183GT vs. ASI183MM Pro: An Integrated System

The ASI183GT builds directly on the success of the ASI183MM Pro, using the exact same high-performance IMX183 monochrome sensor. The primary distinction is the GT's all-in-one design.

• ASI183MM Pro Advantage: The Pro model offers more flexibility. If you already own a 7 or 8-position filter wheel or require larger 36mm or 2" filters for a full-frame optical system, the ASI183MM Pro allows you to build your own custom imaging train.
• ASI183GT Advantage: The GT model simplifies your setup significantly. By integrating the 5-position 1.25"/31mm filter wheel, ZWO reduces cable clutter, potential tilt, and overall system weight. The built-in USB 2.0 hub and 12V power distribution further streamline connections to guide cameras or electronic focusers. For imagers using short refractors where back-focus and weight are critical, the GT is the more compact and manageable solution.

Stable Imaging with 256MB DDR3 Buffer & TEC Cooling

Long-exposure astrophotography demands thermal and data stability. The ASI183GT uses a two-stage thermoelectric cooler that actively reduces sensor temperature by up to 45°C below ambient, dramatically cutting thermal current and resulting in cleaner, lower-noise images. This cooling is essential for narrowband imaging where exposures can last several minutes. To prevent data loss or corruption during transfer, the camera features an onboard 256MB DDR3 memory buffer, ensuring every frame is transmitted reliably to your computer, even on slower USB 2.0 connections.