How stacking can transform deep-sky images
t first glance a single RAW image can look quite good – just like our photo of 081 and 082 (above, right). But problems will soon come to light if you tried to process it further: you’d quickly find it would not contain enough data or depth, and the image would start to deteriorate. The way to jet round this problem – and achieve a richer picture quality on faint deep-sky objects – is to stack a number of images together
