Sometimes it is good to delve into a bit of ancient history to see how things have developed (or not). This image of Alcyone (in the Pleiades) is from 20/11/2005. It was taken using an original Hyperstar (no collimation or rotation adjustment) on a Celestron Nexstar C11 with a tiny little SXVH9C OSC CCD (1.4 megapixels from memory). This is a massive 312 subs but with only 20-seconds per sub! What do you notice about the image? Well it is glassy smooth and noise-free due to the 312 subs – BUT – it is not very deep, due to the very short 20-second exposures. Win some, lose some I guess.
