black circle in promes

[p1taylor]

Hi All, Hope sum one can help with how to put black circle in the centre off white circular proms image so it just to show proms

peter

[AstroBee]

Peter,

Are you asking how to do something like this? https://www.theskysearchers.com/viewtop ... 69&t=21276
So that your image looks like it was taken during a total eclipse?

If so, it's easy to create a circular mask in PhotoShop or other image editing programs. You just have to size it to match the curvature of your image scale.