Author Topic: ETTR one way ONLY  (Read 2964 times)

nicotom

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ETTR one way ONLY
« on: March 02, 2020, 02:29:28 AM »
Hi everyone.

I am a fan of Timelapses and for now i have used qDslrDashboard with my 5D3.
I had "too much" stuff to take with me. I now have 2 kids and less space in my bags when i travel.

I recently baught a EOS M and i try ML on it with intervalometer and ETTR. It works preaty well !!!
I juste wanted to know if it is posible to "force" ETTR in one way only.
I do day to night timelapses. Everything is going well but if, for exemple, a car passes by, ETTR will adjust the shutter speed and will make it shorter for the next picture.
I would like to avoid that.
So if the sun goes down i would like it to adjust the shutter speed by going slower ONLY. i dont what it to be able to go back.

Is it possible ??

Thanks

ChristianEOS

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Re: ETTR one way ONLY
« Reply #1 on: November 24, 2020, 05:50:59 AM »
Maybe Duel iso would be good cheek often uses the EOS m for RAW  VIDEOS. The chef got no four even no room for the smaller camera compared to the 5D III I would just shoot with my mobile with Lightroom you also can you get RAW pictures.
Christian Bruno James

c_joerg

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Re: ETTR one way ONLY
« Reply #2 on: November 24, 2020, 09:05:42 AM »
I would just shoot with my mobile with Lightroom you also can you get RAW pictures.

I have never seen a mobile with which you can make reasonable time-lapses directly in the sun. There are usually a lot of flares and the core of the sun is very washed out.

Hi everyone.

I am a fan of Timelapses and for now i have used qDslrDashboard with my 5D3.
Everything is going well but if, for exemple, a car passes by, ETTR will adjust the shutter speed and will make it shorter for the next picture.
I would like to avoid that.
 

There is a very good time-lapse script for the EOS M with CHDK, in which you can set the maximum size of the changes in EV (Max Ev change).
https://chdk.fandom.com/wiki/Lua/Scripts:_Raw_Meter_Intervalometer
I wouldn't be surprised if ML couldn't do that too.
.
6D

Walter Schulz

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Re: ETTR one way ONLY
« Reply #3 on: November 24, 2020, 09:15:40 AM »
Joerg, have you been able to run that script on EOS M?

c_joerg

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Re: ETTR one way ONLY
« Reply #4 on: November 24, 2020, 09:27:11 AM »
Joerg, have you been able to run that script on EOS M?
No the Script runs only on M3, M10 and M100.(I wrote the M with CHDK).
The link was only intended as an example to show what to look for..
6D

Walter Schulz

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Re: ETTR one way ONLY
« Reply #5 on: November 24, 2020, 09:30:20 AM »
Thanks for pointing that out. I'm pretty sure most newbies here won't be able to tell the difference ...

Audionut

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Re: ETTR one way ONLY
« Reply #6 on: November 25, 2020, 12:53:05 AM »
https://www.magiclantern.fm/forum/index.php?topic=8431.0

edit: the above link will lead to a module and script helpful for timelapses, but doesn't really address your initial issue.

In either case, the car driving past will I guess effectively ruin that exposure. If you want to rely on Auto_ETTR, I would think that "midtone/shadow SNR limit" may work well here: https://www.magiclantern.fm/forum/index.php?topic=5693.0