StarTrail, Dec 9/10 th 2013. Star trail shot with the Olympus E-M1 & 12mm prime (post firmware update). 2-3hrs of 10s exposures shot continuous (no in-camera noise reduction dark frame subtraction), F2.0 ISO 250. 4.5 hrs from a single battery (BLN-1) shooting continuous which is excellent. Approx 1000 No exposures combined with stacking software (StarStax) to produce the final composite showing Earths spin through the stars.
How did I capture it? - Camera on tripod with setting above. Manual focus set to infinity I framed the tree ensuring polaris (north star) around which all other stars spin was located at top right of trees. The first shot was captured/exposed through the lcd screen and then using the remote cable (set to lock) and turning off lcd (maximise battery) I depressed shutter. This allowed the camera to shoot continuous for many hours (until the battery died). The trees were paint lit by simply shining a strong torch for a few seconds. To prevent the lens from fogging/dew forming I strapped my DIY dew shield around the lens (Zippo hand warmer). Once the camera battery had died I transferred all images (High res JPEG) to MAC and imported/stacked in StarStax software. Plane trails removed using Pixelmator software. Voila :-)
StartrailOlympusOMDEM1Mark Humpageastronomynightlow lightstarsplanetspolaristree