Timelapse shutter drag

[garry23]

I am using silent picture mode for timelapse and it is great. I ingest into LR and use LRTimelapse.

One thing I'm not sure about is the exposure when pulling a silent picture from the LV.

Assuming I set a base exposure to ISO 100, f/10 at 1/200 is this the exposure that the silent picture dng is captured at? Or is silent picture not related to the mechanical shutter?

I correct the missing dng EXIF in LR using LensTagger. This is OK for a fixed timelapse, but if I shoot a-ETTR holy grail then the EXIF data could be all over the place. So I still need to work out how to correct the EXIF in this case.

Finally, is there a way to tell the camera that I don't want to shoot faster than x, ie to ensure the 'shutter' is dragged. Of course this is irrelevant if a silent picture doesn't have an equivalent shutter time. There are ways to tell the camera not to shoot slower than y.

[a1ex]

For correct exposure, switch to movie mode. In photo mode you get ExpSim, and I expect you to know what that is

[garry23]

Alex

It has also become clear to me that a-ETTR gets changed if you invoke FPS override.

What would you suggest is the best capture strategy for shutterless timelapse?

Cheers

[garry23]

Alex

After many experiments I have concluded that if I wish to do a silent dng timelapse AND use ETTR then I can not use movie mode. I must use picture LV mode.

The ETTR always on works in LV picture mode but not movie mode, ie throwing a cloth over the lens in picture LV modes clearly shows the exposure changing, in movie mode nothing happens.

Am I completely wrong?

[a1ex]

The help message from ETTR menu should tell you what to do.

(that is, enable raw video, but don't start recording)