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Using Magic Lantern => General Help Q&A => Topic started by: burnsluciano on August 21, 2012, 04:35:01 PM

Title: low ISO setting
Post by: burnsluciano on August 21, 2012, 04:35:01 PM
i'm getting this pink when using this iso setting on a t3i not sure if thats supposed to happen

iso setting
equivalent iso 25
canon analog iso 100
ml digital iso -2.0ev
highlight tone p off
iso selection ml iso

(http://img835.imageshack.us/img835/1664/image1oit.jpg) (http://imageshack.us/photo/my-images/835/image1oit.jpg/)

(http://img100.imageshack.us/img100/4568/image2nf.jpg) (http://imageshack.us/photo/my-images/100/image2nf.jpg/)
Title: Re: low ISO setting
Post by: Francis on August 21, 2012, 05:15:06 PM
That is the big side effect from using ISOs that low. It is caused by the different color channels clipping at different values. You really have to avoid blowing out your highlights when using that low of a ML ISO gain, or figure out a creative way to get rid of the pink in post.
Title: Re: low ISO setting
Post by: burnsluciano on August 22, 2012, 05:06:14 PM
Quote from: Francis on August 21, 2012, 05:15:06 PM
That is the big side effect from using ISOs that low. It is caused by the different color channels clipping at different values. You really have to avoid blowing out your highlights when using that low of a ML ISO gain, or figure out a creative way to get rid of the pink in post.

thats what i figured at 1st i thought i was buggin. thanx for the info
Title: Re: low ISO setting
Post by: ilguercio on August 22, 2012, 05:09:09 PM
You're going to have 2 less stops of Dynamic Range at 25 iso so expose properly in order not to ruin your clip.
Title: Re: low ISO setting
Post by: NunoAlmeida on August 24, 2012, 10:39:10 PM
How did you set iso 25 in photo mode with your t3i?
Title: Re: low ISO setting
Post by: nanomad on August 24, 2012, 10:43:04 PM
That's not photo mode, that's video mode. The shot is taken from a 1280x720 video (scaled down)

YOU CAN'T GET ISO 25 IN PHOTO MODE
Is that clear?

If you need ISO 25 either get a ND filter or under-expose the shot with an image editor if that's a viable soultion.
Title: Re: low ISO setting
Post by: F.A.D. on August 27, 2012, 08:47:13 AM
Hi,

how to i manage to dial in the ISO's 25, 50,  etc. I read the manual etc. but I can not manage to set the ISO's to that level. (I'm on a 5dMKII with the unified 2.3 ML) I selected ML ISO's. In the manual there is also stated that I can reduce the digital gain, also that is not working here :-(

I would really appreciate if you could give me a hint how to do it right.

Best regards,

David
Title: Re: low ISO setting
Post by: nanomad on August 27, 2012, 10:24:15 AM
Are you using video mode?
Title: Re: low ISO setting
Post by: F.A.D. on August 27, 2012, 11:32:47 AM
Quote from: nanomad on August 27, 2012, 10:24:15 AM
Are you using video mode?

Yes I'm in video mode, so when I press "Set" it will record video so I assume I am in video mode.

Thanks for the good support!
Title: Re: low ISO setting
Post by: Rehaan on August 27, 2012, 03:58:30 PM
Scroll down to the "Pink Highlights" part :

http://magiclantern.wikia.com/wiki/ISO

cya
R
Title: Re: low ISO setting
Post by: F.A.D. on August 27, 2012, 06:49:38 PM
Quote from: F.A.D. on August 27, 2012, 11:32:47 AM
Yes I'm in video mode, so when I press "Set" it will record video so I assume I am in video mode.

Thanks for the good support!

When I turn off Global draw the ISO's are there!
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