Timelapse from night to day

sonofaresiii

Well-known member
Hey guys, I don't do a lot of timelapse, hoping you can help me out. The idea here is I'm shooting a window looking outside and want to timelapse from night to morning... but I don't know how to expose it so I can get both (I've been doing tests all week, just hoping for some advice so I don't waste my time testing something that probably won't work). Should I just try and find the closest split I can, while guesstimating how bright it's going to be in the morning? Setting autoexposure is an option, but I want to stay away from that... unless that's the norm?

That's the general question, for specifics, here's what I'm trying to do--

It's a night scene in an apartment. A guy sits on a couch and his girl comes up, takes her shirt off and crawls on top of him (you know.)
The camera pans away and sits at a window, we cut, lock the camera off and break into a timelapse showing the sun coming up. Once we hit morning, we kill the timelapse and start rolling again, pan down to the fella sprawled out and asleep on top of the girl.
We're going to use heavy backlight for the night scene and hopefully I'd get to a point where once the sun comes up, it drowns out the back light (a little highlight from it is okay, temps will be matched).
Any thoughts? Obviously we only get one shot at this, unless I want to drag everyone back out for another shot on another day.
(The good news is that while I really want the shot, it's not VITAL, so if I end up wrecking it I can just cut it and do a fade from night to morning)
 
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