![]() We stack multiple exposures of the same subject to increase SNR (signal to noise ratio) - essentially, to reject noise and other artefacts from the final exposure, which allows you to pull through more meaningful detail of the actual night sky objects.ĭepending on the subject and its brightness, long exposures - sometimes in excess of five or even ten minutes - are usually required to reveal enough detail, and with longer exposures comes increased noise levels and greater risk of visual artefacts like star trailing, light pollution and light trails from aircraft flying overhead. To understand the significance of having this functionality in a low-cost image editing application, we should consider the complexity of the stacking workflow and its requirements. The workflow is not complex either - if anything, the straightforward nature of the entire process may seem contradictory to expectations at first!Īstrophotography Stacking In An Inexpensive Photo Editor In this regard, Affinity Photo is relatively unique: it can perform the entire postproduction workflow required for professional-level astrophotography, all in 32-bit linear precision. This functionality is not commonly found in image editors - instead, it has always been the domain of dedicated astrophotography software, which can vary in price from free to several hundred dollars. One of the more esoteric additions was the introduction of a new ‘Persona' (or workspace) for astrophotography stacking. Introducing Astrophotography Stacking In Affinity ![]() Version 1.9 of Affinity Photo launched earlier this year in February and introduced an array of useful and powerful improvements, from linked layer functionality to better organisation for LUTs, OpenCL hardware acceleration for Windows and long-awaited saveable workspaces. ![]()
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