Pier 4 is a ZWO ASI-2066MC Pro OSC, with a Sigma 105mm f/1.4 lens stopped to F/2, an Astromechanics focuser, guided with a ZWO ASI-120 Mini and ZWO Mini guide scope, on an Astro Physics AP900 GTo3 mount. The mount actually runs unguided, so the guide scope is in there only as a backup. For this object I used 150 subs each at 2 minutes long each - totalling 5 hours.
