ZWO ADC Mark II

The ZWO ADC Mark II corrects atmospheric dispersion, or the rainbow-like color cast that occurs when light breaks through the atmosphere. Especially at low altitudes above the horizon, you can see this effect strongly on planets and bright stars. The ADC Mark II uses two precisely adjustable prisms that create an opposite refraction, causing all colors to converge again. The result: razor-sharp and colorfast images, both visual and photographic.

This dispersion corrector allows you to see fine details on Jupiter, Saturn and Mars without distracting color fringes. It works from about 15° above the horizon, allowing you to observe or photograph longer and more reliably. Two rotary knobs ensure quick and precise adjustment, while the sturdy clamping ring holds the prisms stably in place.

The ZWO ADC Mark II features T2 threads on both sides and a 1.25″ eyepiece interface, making it easy to connect to telescopes and cameras. The multiple anti-reflection coating with > 98% light transmission guarantees a bright and contrast-rich image. With only 200 grams and a robust aluminum housing, it remains lightweight and stable in use.

Application
The ZWO ADC Mark II is ideal for serious observers and astrophotographers who want to achieve true-to-life colors and maximum sharpness in planetary observations. Use it together with a short Barlow lens (2×-3×) on fast systems (< f/10) for best results. Suitable for:

• Visual observations of Jupiter, Saturn and Mars
• Planetary astrophotography with webcams and CMOS cameras
• True-to-life color reproduction at low planetary heights

Specifications

• Connections: T2 (M42 × 0.75) male on both sides
• Eyepiece interface: 1.25″ (31.7 mm)
• Prisms: crystalline silicate glass, rotatable with clamping ring
• Coating: multiple AR 300-700 nm, transmission > 98%
• Weight: 200 g
• Material: CNC-machined, black anodized aluminum
• Application: visual and photographic use