I'm using the SVbony 60mm SV106 scope, and I was using the ASI290mm, although recently I purchased the large sensor ASI432mm for solar. This has been an absolutely stellar (forgive the pun) guide camera. I didn't even think to use it for that but wondered if it could possibly act in place of a ASI174mm mini upgrade for a OAG/larger sensor guide camera, and it has done a wonderful job so far.