The Filaments of the Veil Nebula

 Posted: Sep 15th, 2026
Technical Info
Telescope/Lens: Samyang 135 f/2 ED
Camera: ZWO ASI585MC Air
Mount: JUWEI 14
Guide Scope: on-axis guide
Guide Camera: ZWO ASI220MM mini
Software: Siril, Ps
Accessories: Angeleyes CF-50, Svbony SV220, VFS
Exposure:
112 x 300" ISO/Gain: 200 - f/3.3, -10°C, Ha
56 x 300" ISO/Gain: 200 - f/3.3, -10°C, OIII
Yellow, Bortle 5 zone:
 Tomsk, Russia
 May 13th, 2026
14 h 0 m
12
Resolution: 2083x3704 px
Scale: 3383 KB

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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