hydrogen alpha

The convent, taken with a DSLR (colour camera)

This is part 3 of my series on astrophotography with filters. Last time I explained how the human eye sees in colour, using three different types of cone cells. We […]

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NGC 6188 - the Fighting Dragons of Ara. Photo taken in hydrogen alpha light.

This is part 2 of a series of blogs about filters and narrowband astrophotography. Bill explains how filters work, why you might use different filters and what a photo taken […]

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A Meade Cassegrain on an NEQ6

This is part 1 of a series of blogs about narrowband photography. In this introduction part, Bill talks about how – and why – he moved from taking astrophotographs with […]

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