Upcoming eclipse.

So I am trying to get ready and wanted to do some time lapse photo's of the eclipse. I will not be doing shots from start to finish, but like to get some good sets of shot during.

So the question is, how long should I wait between shots?

Thanks.

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Hmm, the changing brightness will prob be a problem, same with my FL.. Either 135 or 200mm.. Looks like I'll play around. I know I won't be able to make it out to a dark area outside of town unless I go camping.

You need to hunt for either bright or dark as eclipse is progress or regress preferably bright.
The main challenge is Red moon during total eclipse.
It is going to be very dark.
Make sure your sensor can handle noise and you can prevent movement.