Official StarTools support forum

Think I may have a lead - it's most likely dew on the QHY8 IR filter - found some threads on this, took the camera out and can see evidence of now dried damp. Given the current hot, humid weather and a TEC running at -20C then DUH! Dew heater to the rescue, also noticed camera was not quite square s...

Dear all I'd appreciate some guidance and advice on what I'm seeing here having AutoDev'd the stacked image. For info, Camera QHY8, Baader MPCC coma corrector, CGEM mount, SW 200P OTA, SharpCap image capture. This is 120 x 30s subs, 60 x 30s darks, no flats or bias, stacked using DSS - not using the...