Expert processing tips to enhance your astrophotos
To maximise the impact of deep-sky images, boosting the signal-to-noise ratio is key. In astrophotography, ‘signal’ is the light emitted from a deep-sky object – for example, a galaxy or nebula – while the ‘noise’ is produced by our camera’s internal systems. Because we use long exposures in astrophotography, our camera sensors start to warm up and introduce thermal and electronic noise into our images. This noise shows up