Artesky eADC V3 Sunobserver - Electronic Atmospheric Dispersion Corrector

Artesky eADC V3 Sunobserver - Electronic Atmospheric Dispersion Corrector

When planets or the moon stand close to the horizon, often the only thing you can see is a blurry disk with color shift, like through a prism. This effect happens because of diffraction of our atmosphere, because the object´s light has to travel through a much longer path through the atmosphere. Often one must wait several hours until the sharpness improves and sometimes the planet stays low because of its orbit.

An ADC is THE solution. Simply installed between camera/eyepiece and focuser, it provides sharper planetary images - even close to the horizon.

How the ADC works - Atmospheric-Dispersion-Corrector:
Our atmosphere diffracts the light in different ways, depending on the wavelength. Red light is diffracted differently than blue light. The closer the objects stand to the horizon, the stronger the effect occurs.

Adjusting the prisms in the corrector changes their refraction and thus dispersion, which counteracts the effect of the Earth´s atmosphere. This neutralizes the color shift. The adjustment takes place automatically during observation or photography, so you benefit from the effect at all times. The color fringing disappears and detail recognition and resolution increase.

The industry-first ADC´s electronic version, which works as standalone and PC operation:
The eADC measures its altitude and then calculates the current dispersion compensation through user settings.

After calibration there is no need to calibrate again when the object altitudes angle has changed.

When the equatorial mount rotates, the eADC automatically adjusts without requiring manual intervention.

The instrument automatically retrieves its position when the equatorial mount crosses the meridian and performs a meridian flip.

The eADC can be used offline or online. The settings of the eADC can be changed through the control software and parameter changes can be made via the adjustment knob.

The connection to the telescope and the connection of eyepieces or cameras:
The eADC consists of three parts, that can be screwed together via a T2 (M42x0,75) thread.

1.25" barrel with T2 male thread

The middle part, the corrector, with a T2 female thread on the telescope side and a T2 male thread on the camera/eyepiece side

1.25" adapter suitable for eyepieces, with added T2 male thread for further screw connections

This means you can attach the eADC to each telescope with 1.25" or with T2 thread. You can also connect all customary cameras or eyepieces via the T2 thread or via the 1.25" receptacle.

The features and benefits of the eADC in summary:

Simple connection via T2 and 1.25" on both sides

22 mm clear aperture

High-quality coating of the prisms

Improved correction thanks to four prisms

Automatic adjustment, therefore permanent compensation of atmospheric dispersion

Usable with all telescopes; you achieve best results with f/10 or slower. For faster telescopes we recommend using a Barlow lens (see accessory section)

- Atmospheric Dispersion Corrector
- Two connection adapters to 1.25"
- Dust protection caps

Safety informations: PDF Download