Jump to content


Photo

Anamorphic Digital Intermediate


  • Please log in to reply
4 replies to this topic

#1 Chris D Walker

Chris D Walker
  • Basic Members
  • PipPipPip
  • 108 posts
  • Other
  • Cornwall, United Kingdom

Posted 06 April 2009 - 11:24 AM

When a film opts to shoot on 35mm with anamorphic lenses and go through a digital intermediate, whether it be at 2K or 4K, what is the standard for scanning resolution when recording back to film? I ask because Super35 4-perf at 2K will be 2048x1536 pixels during the scan or telecine, but as anamorphic uses slightly less of the horizontal film area it would be 1828x1536. Would the anamorphic scan be slightly uprezzed to 2048 horizontal by 1712 vertical pixels and recorded out to film or be recorded out at 1828 horizontal by 1536 vertical pixels? Is the number of vertical pixels something other than 1536?

I have tried to find the answer online but I haven't as of yet. As someone with an obsessive compulsive tendency I find it hard to drop this thought. I would appreciate anyone answering this small but 'impossible to get out of my head' riddle so I can lay it to rest.
  • 0

#2 Dirk DeJonghe

Dirk DeJonghe
  • Basic Members
  • PipPipPipPip
  • 612 posts
  • Industry Rep
  • Kortrijk,Belgium

Posted 06 April 2009 - 02:17 PM

I always use 2048x1742 for anamorphic academy aperture since some anamorphic lenses won't cover full width Super 35. Since my scanner can zoom optically I can work most efficiently using the full 2048 pixel width.
  • 0

#3 Elliot Rudmann

Elliot Rudmann
  • Basic Members
  • PipPipPip
  • 208 posts
  • Other
  • Chicago

Posted 06 April 2009 - 07:27 PM

When a film opts to shoot on 35mm with anamorphic lenses and go through a digital intermediate, whether it be at 2K or 4K, what is the standard for scanning resolution when recording back to film? I ask because Super35 4-perf at 2K will be 2048x1536 pixels during the scan or telecine, but as anamorphic uses slightly less of the horizontal film area it would be 1828x1536. Would the anamorphic scan be slightly uprezzed to 2048 horizontal by 1712 vertical pixels and recorded out to film or be recorded out at 1828 horizontal by 1536 vertical pixels? Is the number of vertical pixels something other than 1536?

I have tried to find the answer online but I haven't as of yet. As someone with an obsessive compulsive tendency I find it hard to drop this thought. I would appreciate anyone answering this small but 'impossible to get out of my head' riddle so I can lay it to rest.


Hey there, when we scan 2k anamorphic footage, our scanner scans at 2048x1556 within the academy frame.

But how can this resolution be the same as a Super 35mm 4perf frame when academy uses less of the original camera negative? Answer: The arriscanner we use shifts it's optics and zooms slighty into the academy frame to obtain this full 2k resolution.

After color correction when we're ready to do the film out, we send the lab 2048x1743 images (slightly uprezzing the vertical pixels to obtain a true unsqueezed scope ratio while keeping the highest 2k resolution possible.) Remember that when the print that the projectionist uses is not squeezed, the lens he/she uses on the projector squeezes the image into the proper 2.35:1 ratio, so the slight vertical uprez is offset. The reason why you can't find any resolute numbers on this subject is because every DI post house works differently, scanners scan at slightly different resolutions based on what the engineers who made them thought the optimal resolution should be. Film recorders also accept different resolutions as well. Hope this helps.
  • 0

#4 MichaelB

MichaelB

    New

  • Basic Members
  • Pip
  • 7 posts
  • Digital Image Technician
  • burbank, ca

Posted 26 April 2009 - 02:50 AM

When a film opts to shoot on 35mm with anamorphic lenses and go through a digital intermediate, whether it be at 2K or 4K, what is the standard for scanning resolution when recording back to film? I ask because Super35 4-perf at 2K will be 2048x1536 pixels during the scan or telecine, but as anamorphic uses slightly less of the horizontal film area it would be 1828x1536. Would the anamorphic scan be slightly uprezzed to 2048 horizontal by 1712 vertical pixels and recorded out to film or be recorded out at 1828 horizontal by 1536 vertical pixels? Is the number of vertical pixels something other than 1536?

I have tried to find the answer online but I haven't as of yet. As someone with an obsessive compulsive tendency I find it hard to drop this thought. I would appreciate anyone answering this small but 'impossible to get out of my head' riddle so I can lay it to rest.


It will be shot out squeezed at 1828x1556, to the academy portion of the neg, for anamorphic print projection. If the DI is done correctly it will never be unsqueezed during post, only electronically unsqueezed to view the image properly.
  • 0

#5 Raghunath Varma

Raghunath Varma

    New

  • Basic Members
  • Pip
  • 1 posts
  • Digital Image Technician

Posted 17 July 2009 - 09:07 AM

When a film opts to shoot on 35mm with anamorphic lenses and go through a digital intermediate, whether it be at 2K or 4K, what is the standard for scanning resolution when recording back to film? I ask because Super35 4-perf at 2K will be 2048x1536 pixels during the scan or telecine, but as anamorphic uses slightly less of the horizontal film area it would be 1828x1536. Would the anamorphic scan be slightly uprezzed to 2048 horizontal by 1712 vertical pixels and recorded out to film or be recorded out at 1828 horizontal by 1536 vertical pixels? Is the number of vertical pixels something other than 1536?

I have tried to find the answer online but I haven't as of yet. As someone with an obsessive compulsive tendency I find it hard to drop this thought. I would appreciate anyone answering this small but 'impossible to get out of my head' riddle so I can lay it to rest.


Hi, I suggest 2K (2048 X 1556) resolution is enough for 35mm anamorphic. If u ask for Super35 4-perf -- after DI the output is 2048 X 872 is recorded to 1828 X 1556 (without audio gate) . I hope this information will help u what u ask if not please ignore.
  • 0


Glidecam

CineLab

Broadcast Solutions Inc

The Slider

New Pro Video - New and Used Equipment

Technodolly

Aerial Filmworks

Paralinx LLC

Ritter Battery

Wooden Camera

Metropolis Post

Tai Audio

Gamma Ray Digital Inc

rebotnix Technologies

Rig Wheels Passport

Abel Cine

Media Blackout - Custom Cables and AKS

Visual Products

Willys Widgets

CineTape

FJS International, LLC

Visual Products

Gamma Ray Digital Inc

Abel Cine

Tai Audio

Metropolis Post

Glidecam

Broadcast Solutions Inc

Technodolly

Ritter Battery

New Pro Video - New and Used Equipment

The Slider

CineLab

Aerial Filmworks

rebotnix Technologies

Willys Widgets

FJS International, LLC

CineTape

Media Blackout - Custom Cables and AKS

Wooden Camera

Rig Wheels Passport

Paralinx LLC