Nick,
Very nice video.
Query on the file size if you don’t mind please.
When I run the timelapse script, I get a much smaller file size (approx 30MB) – I’m running this on a Pi3.
Have you configured the settings to improve image quality or something (thereby resulting in a larger file size)?
Re focus, IIRC Denis recommends keeping the focus a little soft in order to improve magnitude estimation.
Regards,
Michael.