This image was captured using Virtual Filter Slots (VFS), an open-source project I developed for ASIAIR and Raspberry Pi Pico.
Ha and OIII can reach their best focus at different focuser positions. VFS lets ASIAIR switch between these positions automatically without moving or replacing the physical filter.
The Ha and OIII integration times are listed separately, but every exposure recorded both bands. For each final channel, I used the exposures taken at its matching focus position.
Learn more about VFS:
https://kirpersidsky.github.io/rp2040-efw-hid-emulator/
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