[TheErnFormerlyKnownAsBig]

Is this photo a group layered on top of eachother or a long exposure?

I am asking because I am trying to figure out how the photographer got enough exposure time without the movement of clouds being blurred.

[MtnClimber]

I don’t know the photo technique that was used. You make a good point.

[vis a vis]

Did a little digging around. This guy is on Facebook ( I dont do Facebook so not posting a link) but also shows up in alot of other places. Write him, he might tell you. He is also on Instagram.

https://earthsky.org/?s=jeff+dai

http://twanight.org/newTWAN/photographers_about.asp?photographer=Jeff%20Dai

[Kirkwood]

This isn’t the 1800s. Digital cameras can have ISO speeds in the many 100s of thousands.