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Hacked together a nodal head to try to make better panoramas

@th was this with auto exposure or auto iso? I wonder where the banding comes from

@uint8_t yes this was aperture priority at 20mm f/8 and iso 400. I'm planning on a 24-hour panorama for the solstice so fixed exposure won't work and plan to shot brackets to try to smooth the banding.

time lapse shenanigans 

@th I'm thinking about fully manual exposure and then using PC-side image analytics and gphoto2 to change the settings for the next shot
In my experience with my D3400, auto exposure causes subtle but noticeable flickering, and I wasn't able to fully get rid of it with ffmpeg filters. With software controlled manual exposure I could easily low-pass filter any exposure changes.
At this time I don't have anything ready-made I could offer.

@uint8_t with three shot bracketing the banding is gone, although so is the sun! so some manual tweaks in the blending might be required to achieve the desired solar path for the 24-hour panorama.

@Quixoticgeek rotating the lens around the "nodal point" (which might not be the correct term), there is no parallax so the panorama stichting is much easier. You can see the three sockets lined up on the bench remain lines up as I rotate the lens around this experimentally determined point.

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