BBC Sky at Night Magazine
3 QUICK TIPS
Pick a night of superior seeing to attempt methane imaging of Saturn as you will need long exposures at high gain and you don’t want too much atmospheric smearing.
Measure your filter thicknesses and swap your methane filter with one of the same thickness, which allows more light through, as this will allow for much easier focusing.
Record for many minutes to build up a longaccumulated exposure time, so that – when you stack – the amount of noise (unwanted artefacts) in the final image is not too bad.