Double Stacking The Quark - 4th October

The Quark is very good on it's own, but adding a second etalon really makes things interesting; the double limb feature as a result of photospheric leakage is gone, and the disk including filaments shows much better contrast - not that the quark in isolation is not good already.  Taken with the 70mm scope at f6 with a 0.5x focal reducer and a DMK31 camera.