The ZWO Atmospheric Dispersion Correction Prism is an image correction optical instrument for astrophotography, primarily recommended for high-resolution planetary and lunar photography. It helps to eliminate the prismatic effect (the splitting of light from celestial bodies into elements) that occurs in the different density layers of the atmosphere as the light from the celestial body passes through the Earth's atmosphere and reaches the observer and the camera. In practice, colour aberration is manifested by the appearance of a red or bluish colour around the edges of the object being photographed. When using a monochrome camera, this error results in a blurred planetary image.
The ZWO atmospheric dispersion corrector prism corrects for the colour error caused by the Earth's atmosphere. What makes the prism particularly suitable for astrophotography is the fact that its correction effect is adjustable, so that it can be set to match the current atmospheric colouring. The atmospheric colouring effect depends on the weather conditions (state of the atmosphere), the height above the horizon of the object being photographed, and also on the type and diameter of the telescope used for the photograph.
The ZWO Atmospheric Dispersion Correction Prism allows you to always make the necessary adjustments to obtain high quality planetary and lunar images.
The instrument fits into 1.25" frames.