Magic Lantern Forum

Using Magic Lantern => Raw Video => Raw Video Postprocessing => Topic started by: Luzestudio on February 07, 2014, 11:27:47 AM

Title: How to apply Lens correction to RAW movie files?
Post by: Luzestudio on February 07, 2014, 11:27:47 AM
Hi!
When I load the dng files from my 50D nothing happens when applyting  the lens distortion correction in Lightroom.
Does anyone know how can we apply this correction?
Sometimes I use the tokina 11-16 for interior shoots and it will be great to correct it.


Best,

Xermán


Title: Re: How to apply Lens correction to RAW movie files?
Post by: Andy600 on February 07, 2014, 12:04:06 PM
That's because there isn't any metadata to tell LR what lens you used. You can add it with Exiftool (I recommend using pyExiftool GUI). Have you tried recording MLV instead?
Title: Re: How to apply Lens correction to RAW movie files?
Post by: Luzestudio on February 07, 2014, 12:21:59 PM
That's because there isn't any metadata to tell LR what lens you used. You can add it with Exiftool (I recommend using pyExiftool GUI). Have you tried recording MLV instead?

Thanks for the answer and interesting tool I did not knew.
Will try MLV recording today.
But I guessed that if I select manually a lens the correction will be applied even if there is no metadata, some kind of "forcing it".

Best,

X.
Title: Re: How to apply Lens correction to RAW movie files?
Post by: Audionut on February 10, 2014, 03:54:41 AM
If you apply it manually, in LR/ACR for instance, it doesn't know the aperture shot at, or the focal length in a zoom lens.
Title: Re: How to apply Lens correction to RAW movie files?
Post by: Luzestudio on February 11, 2014, 09:25:54 AM
If you apply it manually, in LR/ACR for instance, it doesn't know the aperture shot at, or the focal length in a zoom lens.

You are totally right.

I recorded a few clips in MLV and now tried the correction, but just a small geometric correction is applied. I don't know if that's correct or if we should expect the same ammount of geometric correction we can see in a picture...

Best!
Title: Re: How to apply Lens correction to RAW movie files?
Post by: g3gg0 on February 11, 2014, 01:14:10 PM
there is one downside of MLVs metadata.
i dont know how to tell LR that the area displayed is *cropped* from the original image....