Finder scopes

David Boyd

A quick calculation using the spec of the QHY5L II camera from their website with a 225mm FL scope indicates a field of view of around one degree. This is probably larger than the field you see in the Alpy guider camera but still quite small if your mount’s pointing is not very accurate. A shorter FL camera lens would give a wider field in proportion to the ratio of their FLs. You could attach a camera lens to the QHY camera with an appropriate adaptor taking account of the distance of the CCD chip behind the front plate of the camera so the lens focuses on the CCD. I don’t know about webcams these days. I imagine the problem would be finding camera driver software compatible with the other software you are using.

Best wishes,