A peculiar feature in sharpcap when enabling auto-save every 15 minutes was that it stacked a 31st frame rendering a stack time of 15 minutes 30s. Each stack of 30 frames included exposures of 30 seconds, with a gain of 230 and an offset of 100. So far, over the past two nights, I managed to stack 496 frames for HO, in live stack batches of 30 frames each, yielding a total of 16 stacks. I aim to construct and HO (one-shot hydrogen/oxygen) RGB image of the Heart Nebula using this approach. 15minute) fully calibrated (flats and darks 60 each) live stacks every night and then to double stack them in DSS as if they were single long-exposure lights. I'd like to share the ongoing results from a project that I've just embarked on from my Bortle 8/9 backyard.
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