Polarie - aligned via polar scope
5 minute tracking with my Olympus OM-D and 8 & 12.5 minute tracking with 35mm Sony RX1 full frame camera.
I had 15 minute examples where the stars are still perfectly round. I'm thinking that I could, at this FOV, even get half an hour. That's very, very impressive.
Photo 1) Sony RX1 - single frame, 518 secs (8.63 mins) at f/4 ISO800, NR off. Straight from camera.
Photo 2) Sony RX1 - single frame, 733 secs (12.22 mins) at f/4 ISO800, NR off. Straight from camera.
Photo 3) Olympus OM-D - stack of six 300-second images at f/5.6 ISO400, NR off. 12-50mm kit lens at 12mm.
The Polarie, weighted reasonably (650 grams in the RX1's case and 1,150 grams in the OM-D's) is a very good performer and will track from horizon to horizon without any reset. I've had it loaded to 2.8kg at 600mm and still get decently round stars after 5 minutes.
With your OM-D - use LiveTime and watch your image magically build in real time. What a feature.
