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Exposure Spike Fix
timelps Offline
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Posts: 12
Joined: Aug 2012
Post: #1
Exposure Spike Fix
Hello.
Is there a work flow to fix this?

During the shots, I changed (experimented) with the shutter speed. Now there are three places with sharp exposure spikes (2 frames in each)...and then sharp drops back to "normal".

I've tried a few ways, but still get the exposure spikes show up. Is there a work flow to follow in order to fix this (possibly)?

Thank you...Lu
09-18-2012 12:02 AM
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gwegner Offline
Developer of LRTimelapse
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Posts: 2,238
Joined: Feb 2011
Post: #2
RE: Exposure Spike Fix
If you have the following situation:

NNSSSN

where (N = normal, S= Spike) you could try the following:


Set keyframes to the images marked bold (normal keyframes, key 1).
Save in LRTimelapse, go to Lightroom
Read metadata in Lightroom (Grid-View, select all, read metadata from files)
Set a filter to >=1 Star

Go to the Develop Module.
Open the film strip at the bottom.
Select the leftmost of those marked images (the second N in the sequence from our example), now select the "S" images while holding Ctrl.

Now hit Ctrl-Alt-Shift-M to invoke "Match Total Exposures" and see if they now look same. If so, save metadata, render video, be lucky!

Please check out my new EBook Time Lapse Shooting and Processing

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09-18-2012 12:15 AM
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timelps Offline
Junior Member
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Posts: 12
Joined: Aug 2012
Post: #3
RE: Exposure Spike Fix
Hello Gunther

Okay, will do.
I've tried something similar with KF 1.

Oh, and in the meantime, for a good measure, I went back
into the mountain stream with rubber boots for a redo : )

So, there was only one spike (in the redo shots), LRT marked it with two left HG KF's
and one right HG KF.

Matching exposures of the last two worked - phew!
Must say LRT with LR makes a HUGE difference along with the help
on this VERY useful forum.

Thank you for that Gunther!
09-18-2012 10:44 AM
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