April 20, 2014, 06:11:11 AM

Author Topic: Normal RAW vs Dual ISO Raw Example Video  (Read 4963 times)

Drizzt321

  • 1D X
  • *******
  • Posts: 1645
    • View Profile
    • Aaron Baff Photography
Re: Normal RAW vs Dual ISO Raw Example Video
« Reply #15 on: July 17, 2013, 02:41:15 PM »
If anyone is interested in the technical details Alex (the main guy responsible for magic lantern) has linked a pdf describing the background on this method in the magic lantern forum.  If you scroll through the cmments you can also find the compiled build of ML with this feature.

http://www.magiclantern.fm/forum/index.php?topic=7139.0


It was an interesting read, although I didn't look at some of the math too closely. As he points out, there are better merging algorithms that can be used that he just didn't implement.
5D mark 2, 5D mark 3, EF 17-40mm f/4L,  EF 24-105mm f/4L IS USM, EF 135mm f/2L, EF 85mm f/1.8
Film Cameras: Mamiya RB67, RB-50, RB-180-C, RB-90-C, RB-50, Perkeo I folder, Mamiya Six Folder (Pre-WWII model)
http://www.aaronbaff.com

canon rumors FORUM

Re: Normal RAW vs Dual ISO Raw Example Video
« Reply #15 on: July 17, 2013, 02:41:15 PM »

jrista

  • 1D X
  • *******
  • Posts: 3242
  • POTATO
    • View Profile
    • Nature Photography
Re: Normal RAW vs Dual ISO Raw Example Video
« Reply #16 on: July 17, 2013, 07:28:09 PM »
Well the colour looks nice in dual-iso, but that's some crazy bad moire on the cushion.

+1 yeah it makes it perform like an Exmor or better for shadow pulling but then again the resolution is what cut in half in each direction so.... and the moire and aliasing are so bad that it looks more or less unusable.

Cut in half only vertically, full resolution horizontally.
My Photography
Current Gear: Canon 7D | Canon EF 600mm f/4 L IS II | EF 100-400mm f/4.5-5.6 L IS | EF 16-35mm f/2.8 L | EF 100mm f/2.8 Macro | 50mm f/1.4
New Gear List: Canon 5D III/7D II | Canon EF 300mm f/2.8 L II

jrista

  • 1D X
  • *******
  • Posts: 3242
  • POTATO
    • View Profile
    • Nature Photography
Re: Normal RAW vs Dual ISO Raw Example Video
« Reply #17 on: July 17, 2013, 07:29:26 PM »
How do displays and prints compare with 14 stops dynamic range?  Are displays just compressing the range back to some lower level?

The general idea is that if you don't have noisy shadows, you can lift them to bring them within the DR of a screen or print. Increased dynamic range supports editing latitude...you get to push the exposure around more. Keep in mind, in these examples, the shadows WERE lifted...if they were left as-is, those shadows would be nearly black. The normal part is noisy because of the lift.
My Photography
Current Gear: Canon 7D | Canon EF 600mm f/4 L IS II | EF 100-400mm f/4.5-5.6 L IS | EF 16-35mm f/2.8 L | EF 100mm f/2.8 Macro | 50mm f/1.4
New Gear List: Canon 5D III/7D II | Canon EF 300mm f/2.8 L II

canon rumors FORUM

Re: Normal RAW vs Dual ISO Raw Example Video
« Reply #17 on: July 17, 2013, 07:29:26 PM »