How great a difference in exposure from frame to frame should LRT's deflicker take care of? (.33 stops? .2? .1?) I had some bad flickering on a couple of sequences and sent the lens for repair. The shop has had it for almost 2 weeks and the most variance in exposure that have been able to measure is .1 stop, often as little as .03. Previously with this lens, I have had no flicker issues that LRT couldn't fix. If LRT should fix 1/10 of a stop flicker, then what I experienced mught be a one-off problem. If a 1/10 of a stop is too much, the lens needs more serious work, its off to Nikon USA.

Hmm, normally aperture flicker is no reason to send the lens to service- even my best lenses show flicker. It's just a mechanical thing.
Either shoot wide open to avoid that or twist the lens.
LRTimelapse deflickering works really well, and there is no real "limit", but it's alwas better to avoid flicker when shooting.

[quote='gwegner' pid='14262' dateline='1381141446']
Either shoot wide open to avoid that or twist the lens.

I wound up running LRT's deflicker on the intermediate jpg files, which still left a little flicker. Then used GBDeflicker on the exported ProRes clip, which took out the worst of the remaining flicker. Just a 20 second clip, to be used in a larger project, probably speeded up to run in 10-12 seconds. (https://vimeo.com/76465565)

Most of the time LRT's deflicker does a fine job. It is only a few sequences that needed this double deflickering.

I can't seem to make the lens twist trick work with my AF nikkors, both D and G series. My guess is that it is because the natural state of the Nikkor lens when of the camera is to be stopped down all the way. When you turn it, it moved off the actuator in the camera.

Wide open isn't always practical, since one sometimes needs a bit of depth os field. I do have a couple variable (fader) ND filters for video that I can use as well.

Thanks for the fine product, though. I wouldn't be including so much time lapse in my work without LRTimelapse.

Here is a good explanation how to get the Nikkors "twisted"
http://www.dangelanuss.com/Flickerfree.html

Here is a good explanation how to get the Nikkors "twisted"
http://www.dangelanuss.com/Flickerfree.html

I saw this, but wasn't sure I wanted to try it. Have you used this method before? And since there is no EXIF aperture data, does that matter with LRTimelapse?

Thanks,

Peter