On the evening of the 19th October I got a couple of clear hours before it clouded over. Enough time to set up the Hyperstar and get an hour (4 x 15-minute subs) on the California nebula. I had forgotten just how fast the Hyperstar is – a total of 1-hour’s exposure time only, but that is equal to five hours on a Sky 90 at f#4.5 I suppose. Still, the Hyperstar is FAST 🙂
