GSO Scopes/Longer Focal Length

[Juno]

Is it true that a 10" scope with a 1250mm focal length experiences colour aberration? how obvious is it to the observer when viewing a celestial object?

[billdan (Bill)]

Reflector telescopes do not have colour aberrations, they do however experience coma at short focal ratios (F5 in this case). So a coma corrector my be purchased if the user finds it annoying near the edge of the field of view.

[anj026]

You may see colour aberration caused by atmospheric conditions. Particularly when viewing objects low in the sky.

[Juno]

Originally Posted by billdan

Reflector telescopes do not have colour aberrations, they do however experience coma at short focal ratios (F5 in this case). So a coma corrector my be purchased if the user finds it annoying near the edge of the field of view.

Thanks for explaining, makes sense now.

[Saturnine (Jeff)]

Some eyepieces can introduce their own chromatic aberrations, so if you're seeing colour fringing in a Newtonian try changing to a different type or focal length eyepiece and notice if it has changed or gone away.