Picture of Hersche Nebula looks much better with a modern digital camera on a smaller telescope, similarly with Orion Nebula.
Ideally use exposure time of an hour in total and at least several minutes to achieve this.
Examples of objects: Andromeda, Heart and Soul Nebula, Pheides, M3
Simple formula devised to maximise image quality:
Dark – from quantum temperature effects on CCD chip
Read – from CCD chip – determines exposure time
· Use multiple exposures and integrate to reduce other terms
· Use short exposures of a couple to a few minutes
· Align them
Lights - Normal photo x2 or so
Darks - with lens cap on to subtract “dark” effect of sensor from integrated image
Flats - use a uniform background such as a white T-shirt
Bias - rapidly taken darks with same ISO
“stretching” image – concentrated on lower end of spectrum to reduce noise to signal ratioe and increase contrast on interesting objects.
Not sure what this software package is called.