Omegon ADC 1.25″ Atmospheric Dispersion Corrector
When you observe planets low on the horizon, the atmosphere acts like a weak prism. It splits light into a spectrum and blurs fine detail - much like chromatic aberration. An atmospheric dispersion corrector compensates for this effect and restores the sharpness that the atmosphere would otherwise steal. The improvement is visible both during visual observation and planetary imaging.
Design and compatibility
The Omegon ADC consists of three connected parts: a 1.25″ nose piece that fits into the telescope's focuser, the corrector body itself, and a 1.25″ barrel for the eyepiece. The barrel also features an external T2 thread, so you can attach a camera with an internal T2 thread directly - no adapter needed. The body is made from aluminium, weighs 175 g, and at just 49 mm long it keeps the optical path compact. Back focus is 40 mm.
Who is it for?
The Omegon ADC atmospheric dispersion corrector is the right choice for planetary observers and astrophotographers who regularly work with objects at low altitude - exactly the conditions where atmospheric dispersion is strongest. Thanks to direct T2 compatibility, it integrates seamlessly into a planetary imaging setup with a dedicated camera.
Technical specifications
| Parameter |
Value |
| Barrel diameter |
1.25″ |
| Eyepiece barrel diameter |
1.25″ |
| External thread |
T2 |
| Back focus |
40 mm |
| Length |
49 mm |
| Weight |
175 g |
| Body material |
Aluminium |
Key benefits at a glance
- Corrects atmospheric dispersion when planets are low on the horizon
- Improves sharpness for both visual use and planetary imaging
- Fits standard 1.25″ focusers
- External T2 thread allows direct camera attachment without an adapter
- Compact and lightweight aluminium body
