The sky allowed only very few exposures on this object, and the -8°C temperature was somewhat unforgiving. In order to cancel out a known lens error (the lens seems to be off a bit from the ideal perpendicular), I rotated the gear 180 degrees at half of the session.
Canon 1100D mod, 14×2 min, ISO 1600, Canon EF 200mm f/2.8L II USM at f/4, HEQ5, Dângău Mare
raw sample
stack – with almost 180 deg rotation :P
cropped, ready for the stars to be healed
the mask produced
the almost no stars version
the original version with all the stars
final: 75% no stars
