BBC Sky at Night Magazine

3 QUICK TIPS

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1.

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.

2.

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.

3.

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.

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