Author Topic: ISO25 on the May 15 2012 build  (Read 27643 times)

Chungdha

  • Freshman
  • **
  • Posts: 97
ISO25 on the May 15 2012 build
« on: July 20, 2012, 09:20:31 PM »
So here is a simple guide showing how to change your ISO to ISO25 while normally ISO100 is the standard lowest ISO on most of the Camera's. It increases also a bit of the dynamic range plus also able to let you have more lower ISO range.

To download this Magic Lantern Build follow the link below:
http://t.co/UzlWYUvP

Michael Zöller

  • Administrator
  • Senior
  • *****
  • Posts: 304
  • 5D Mark II
Re: ISO25 on the May 15 2012 build
« Reply #1 on: July 23, 2012, 01:06:42 AM »
Thanks for the vid!
neoluxx.de
EOS 5D Mark II | EOS 600D | EF 24-70mm f/2.8 | Tascam DR-40

rednax

  • New to the forum
  • *
  • Posts: 17
Re: ISO25 on the May 15 2012 build
« Reply #2 on: July 23, 2012, 01:48:00 AM »
this features is on new firmware 2.3??

KarateBrot

  • Freshman
  • **
  • Posts: 80
Re: ISO25 on the May 15 2012 build
« Reply #3 on: July 23, 2012, 05:08:12 AM »
yes
If you donate a RED EPIC to me you officially are very cool ;)

Matthew Kieren

  • New to the forum
  • *
  • Posts: 8
Re: ISO25 on the May 15 2012 build
« Reply #4 on: July 23, 2012, 07:41:21 AM »
Canon 60D, 18-55mm IS, 55-250mm IS, Tascam DR-40
SMC Pentax-M 50mm f/1.4, Yongnuo YN560-II

a1ex

  • Administrator
  • Hero Member
  • *****
  • Posts: 12564
Re: ISO25 on the May 15 2012 build
« Reply #5 on: July 23, 2012, 07:47:26 AM »
That's a very rough draft - take it with a grain of salt.

Chungdha

  • Freshman
  • **
  • Posts: 97
Re: ISO25 on the May 15 2012 build
« Reply #6 on: July 23, 2012, 04:51:22 PM »
It works still in the new 2.3 version just still got the color shift to green but nothing that bit of color correction cant fix.

screamer

  • Member
  • ***
  • Posts: 157
Re: ISO25 on the May 15 2012 build
« Reply #7 on: July 23, 2012, 10:59:36 PM »
All this iso things are really interesting, and the article is a pleasing and illuminating read.
But i want to ask a question. why the digital negative gain isn't available in photo mode? it's because you don't find useul or for some hardware/software limitations? because i think that decreasing the 100iso limit should be very interesting used like a "digital ND filter". I mean, lowest iso, increased time. So for long exposures should be interesting (i don't know how many stops this could be done, but could be useful)
always trying to use the 100% of magic lantern..
Gear:
Canon 60D, all the samyang lenses, Canon 50 mm 1.4, Canon 60mm macro, Canon 70-300 usm, Sigma 4.5mm fisheye, Sigma 17-70 2.8, Canon 40mm f2.8 pancake, all the Lensbabies and a lot of other pieces, Flash metz 58 af2

a1ex

  • Administrator
  • Hero Member
  • *****
  • Posts: 12564
Re: ISO25 on the May 15 2012 build
« Reply #8 on: July 23, 2012, 11:01:16 PM »
In photo mode you can shoot RAW - which contains all the dynamic range you can get.

hoiman417

  • Guest
Re: ISO25 on the May 15 2012 build
« Reply #9 on: July 24, 2012, 05:30:10 AM »
Is it possible integrate this feature into auto ISO?

Or is there any better way to use ISO25 in light changing scenes?

a1ex

  • Administrator
  • Hero Member
  • *****
  • Posts: 12564
Re: ISO25 on the May 15 2012 build
« Reply #10 on: July 24, 2012, 07:44:30 AM »
No.

For light changing scenes, @3pointedit had the idea of using HDR video - take a look around.

rednax

  • New to the forum
  • *
  • Posts: 17
Re: ISO25 on the May 15 2012 build
« Reply #11 on: July 24, 2012, 09:50:25 PM »
because i think that decreasing the 100iso limit should be very interesting used like a "digital ND filter". I mean, lowest iso, increased time.

I think the same thing. I'd like to shoot at ISO 25. so I can increase exposure when the sun is up, as if I had a nd filter

ClicketyClick

  • New to the forum
  • *
  • Posts: 4
Re: ISO25 on the May 15 2012 build
« Reply #12 on: July 24, 2012, 11:11:27 PM »
In the days of film ISO 25 would be giving the finest resolution. Does anything like his happen here that increases Image Quality? (for stills)

screamer

  • Member
  • ***
  • Posts: 157
Re: ISO25 on the May 15 2012 build
« Reply #13 on: July 25, 2012, 03:10:00 AM »
ClicketyClick pointed out exactly the meaning of my question: is it possible to have lower iso than 100 (with conseguent less noise and better iq than the standard 100iso lowest value? but if i understood well, the answer is no, or better the lowest iso is a pull down of a more great value (160?)
And if it's true, is the image quality of 160iso the same of 100iso (i mean with raw shooting, the noise level is the same?)
always trying to use the 100% of magic lantern..
Gear:
Canon 60D, all the samyang lenses, Canon 50 mm 1.4, Canon 60mm macro, Canon 70-300 usm, Sigma 4.5mm fisheye, Sigma 17-70 2.8, Canon 40mm f2.8 pancake, all the Lensbabies and a lot of other pieces, Flash metz 58 af2

a1ex

  • Administrator
  • Hero Member
  • *****
  • Posts: 12564
Re: ISO25 on the May 15 2012 build
« Reply #14 on: July 25, 2012, 09:17:53 AM »
160 is pulled down from 200, so the RAW files shot with these two ISOs will be identical.

The lowest analog ISO is 100.

ClicketyClick

  • New to the forum
  • *
  • Posts: 4
Re: ISO25 on the May 15 2012 build
« Reply #15 on: July 25, 2012, 11:55:26 PM »
so that's a "No"?

SuperHans28

  • New to the forum
  • *
  • Posts: 12
Re: ISO25 on the May 15 2012 build
« Reply #16 on: July 26, 2012, 11:52:52 PM »
I've had a quick look at the ML ISOs and I can't say I see any difference (apart from brightness of the 800 over the 700)?

ML 700 ISO (800 with -0.3ev ML) - http://farm8.staticflickr.com/7248/7652727356_c1e416bb43_h.jpg
Canon 700 ISO (800 with -0.3ev Canon) - http://farm9.staticflickr.com/8017/7652723946_f8b0c6ff22_h.jpg
Canon 800 ISO - http://farm8.staticflickr.com/7274/7652720492_07ecc4670a_h.jpg

Chungdha

  • Freshman
  • **
  • Posts: 97
Re: ISO25 on the May 15 2012 build
« Reply #17 on: July 27, 2012, 06:29:27 PM »
rarely use iso700 though

he56ys5ysu7w4

  • Freshman
  • **
  • Posts: 61
Re: ISO25 on the May 15 2012 build
« Reply #18 on: July 27, 2012, 08:36:51 PM »
I've had a quick look at the ML ISOs and I can't say I see any difference (apart from brightness of the 800 over the 700)?

ML 700 ISO (800 with -0.3ev ML) - http://farm8.staticflickr.com/7248/7652727356_c1e416bb43_h.jpg
Canon 700 ISO (800 with -0.3ev Canon) - http://farm9.staticflickr.com/8017/7652723946_f8b0c6ff22_h.jpg
Canon 800 ISO - http://farm8.staticflickr.com/7274/7652720492_07ecc4670a_h.jpg

Noticed the beer was full in pic one and empty in the net. ;-)
Amateur shooting family stills and video
Gear: Canon 600D/T3i -- Sigma 30/f1.4 EX DC HSM -- Canon EF-S 15-85/f3.5-5.6 IS USM -- Canon EF 50/1.8 II -- V3 LCD Viewfinder loupe -- Velbon RUP-L40
Editing with LR3 and FCPX

nitin

  • Just arrived
  • *
  • Posts: 1
Re: ISO25 on the May 15 2012 build
« Reply #19 on: July 28, 2012, 09:18:21 PM »
Does this lower iso works with pics? I am new to magic lantern.

scrax

  • Contributor
  • Hero Member
  • *****
  • Posts: 1543
  • Code monkey
Re: ISO25 on the May 15 2012 build
« Reply #20 on: July 28, 2012, 09:49:40 PM »
Does this lower iso works with pics? I am new to magic lantern.
No, you can have same result if you shoot in raw and underexpose in post.
I'm using ML2.3 for photography with:
EOS 600DML | EOS 400Dplus | EOS 5D MLbeta5- EF 100mm f/2.8 USM Macro  - EF-S 17-85mm f4-5.6 IS USM - EF 70-200mm f/4 L USM - 580EXII - OsX, PS, LR, RawTherapee, LightZone -no video experience-

Rush

  • Member
  • ***
  • Posts: 159
  • 5D3, EOS M
Re: ISO25 on the May 15 2012 build
« Reply #21 on: August 09, 2012, 04:41:28 PM »
So here is a simple guide showing how to change your ISO to ISO25 while normally ISO100 is the standard lowest ISO on most of the Camera's. It increases also a bit of the dynamic range plus also able to let you have more lower ISO range.
Are you sure? I think that the best dynamic range only possible with native ISO100.
I think that ISO25 is the ISO100 with cut of 2 stops of dynamic range. Is it wrong?
Greetings from Russia!

KarateBrot

  • Freshman
  • **
  • Posts: 80
Re: ISO25 on the May 15 2012 build
« Reply #22 on: August 09, 2012, 04:59:54 PM »
You really get more details in the highlights which are normally clipped. you can see that the whites are getting more pink. that's because not all colors clip at the same intensity and that's what ML uses as an advantage
If you donate a RED EPIC to me you officially are very cool ;)

Rush

  • Member
  • ***
  • Posts: 159
  • 5D3, EOS M
Re: ISO25 on the May 15 2012 build
« Reply #23 on: August 09, 2012, 08:57:37 PM »
But what about details in the dark area?
Overall dynamic range of ISO 25 will be 2 stops less than ISO 100? (with better highlight roll-off, but crushed blacks by 2 EV, yes?)
Greetings from Russia!

KarateBrot

  • Freshman
  • **
  • Posts: 80
Re: ISO25 on the May 15 2012 build
« Reply #24 on: August 09, 2012, 09:26:36 PM »
sure, but that's how all ISO values behave. i don't know what you want to say. if something with the exposure value is different than it's going to be in the highlights
If you donate a RED EPIC to me you officially are very cool ;)