[solardev]

For redistribution, JPEG or AVIF or WebP. I'd choose JPEG myself... good enough compression with broad compatibility. You'll almost never run into an issue with it. AVIF and WebP are still full of gotchas, so I wouldn't deploy them without a JPEG fallback.

For sharing masters/originals, it just depends on your team's needs. Probably saving the camera RAW is a good idea, but usually there's been edits done to it, so some Photoshop or Lightroom native format, for example, or at least a TIFF if you need broader compatibility.