Hi All,

New to the group, but hope that someone can help.

I've recently moved over to Stellarmate (Raspberry pi) after having some decent success using Astroberry. However, when it comes to imaging I appear to have come up against an issue. The attached image is a 180s sub taken using a Samyang 135mm lens and canon 600d, tracked on a HEQ5 pro mount. For some strange reason the image has duplicated itself within the same image file. Only tracking when the image was taken and not guiding, but with the stars been pretty round it didn't look like trailing.

Any suggestions welcomed.

Clear skies,
Sam

It's more likely to be a tracking issue than an image duplicating itself with a slight offset that is more reminiscent of tracking issue

That issue appeared on a single image? On the whole session? After dithering?