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Startravel

Connorbrad98
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John

John

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Posted
28 minutes ago, Connorbrad98 said:

On me skywatcher startravel 120mm defocused stars at the edges are appearing slight rugby ball shaped when I focus them they appear to be seagull shaped anyone know what this is ?

Sounds like astigmatism. May well be the eyepiece rather than the scope. What eyepiece were you using ?

 

 

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Connorbrad98

Connorbrad98

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53 minutes ago, John said:

Sounds like astigmatism. May well be the eyepiece rather than the scope. What eyepiece were you using ?

 

 

Could it also be a combination with the diagonal aswell could I also be using a poor diagonal?

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John

John

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Posted (edited)
6 minutes ago, Connorbrad98 said:

Could it also be a combination with the diagonal aswell could I also be using a poor diagonal?

Possibly, but the most common cause of astigmatism is a low cost wide field eyepiece used in a fast (eg: F/6, F/5 etc) scope.

 

Edited by John
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