Jump to content


Photo

The Oh in Ohio


  • Please log in to reply
7 replies to this topic

#1 Jason Debus

Jason Debus
  • Sustaining Members
  • 311 posts
  • Student
  • Los Angeles, CA

Posted 28 December 2006 - 02:47 PM

The bokeh in The Oh in Ohio seems anamorphic, but supposedly it was shot with spherical lenses (according to imdb). I've seen this in other films before, what type of lens causes this type of distortion? The bokeh seems a more rectangular oval than anamorphic. This screen grab from the trailer isn't that hi-res but it's all I could find after watching the DVD:

Posted Image
  • 0

#2 Mitch Gross

Mitch Gross
  • Basic Members
  • PipPipPipPip
  • 2873 posts
  • Cinematographer

Posted 28 December 2006 - 03:05 PM

Looks like a matte in the mattebox to me.
  • 0

#3 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 20074 posts
  • Cinematographer
  • Los Angeles

Posted 28 December 2006 - 08:56 PM

Looks kind of like an anamorphic lens artifact -- beats me...
  • 0

#4 Satsuki Murashige

Satsuki Murashige
  • Sustaining Members
  • 3510 posts
  • Cinematographer
  • San Francisco, CA

Posted 29 December 2006 - 04:53 AM

Looks like a matte in the mattebox to me.


Huh? What do you mean?

IMDB has been wrong before...
  • 0

#5 Andy Sparaco SOC

Andy Sparaco SOC
  • Sustaining Members
  • 203 posts
  • Cinematographer
  • Chicago and most airline lounges

Posted 29 December 2006 - 07:10 AM

Looks like a composite shot to me. With the background stretched or blown up a bit in post
  • 0

#6 Jason Debus

Jason Debus
  • Sustaining Members
  • 311 posts
  • Student
  • Los Angeles, CA

Posted 29 December 2006 - 09:03 AM

The screen grab from the trailer I posted is a terrible example because it's kind of a wide shot. I think Mitch is on the right track, a matte box or something obscurring the circles. I would like to understand what is actually going on a little more, is it like vignetting? Here's a diagram of the type of bokeh I'm talking about:

Posted Image
  • 0

#7 Satsuki Murashige

Satsuki Murashige
  • Sustaining Members
  • 3510 posts
  • Cinematographer
  • San Francisco, CA

Posted 29 December 2006 - 07:44 PM

The screen grab from the trailer I posted is a terrible example because it's kind of a wide shot. I think Mitch is on the right track, a matte box or something obscurring the circles.

Ah, optical vignetting, then?

The bokeh looks pretty uniform, from sides to center frame, though. Wouldn't optical vignetting be more noticeable near the edges of the frame and gradually disappear toward the center?
  • 0

#8 Nick Mulder

Nick Mulder
  • Basic Members
  • PipPipPipPip
  • 1023 posts
  • Other
  • Auckland, New Zealand

Posted 29 December 2006 - 08:45 PM

Maybe there were just a few scenes with what were registered as point sources of light in the background that were in fact oval or rectangular sources that naturally produce the elongated bokeh that has caught your eye ? It certainly is possible with the example frame grab we have here.

That being said I haven't seen the whole film so cant comment on the rest of what you have described...

yeh yeh ?

no ? :rolleyes:
  • 0


Visual Products

Glidecam

Gamma Ray Digital Inc

Media Blackout - Custom Cables and AKS

rebotnix Technologies

CineLab

Paralinx LLC

Tai Audio

Metropolis Post

Ritter Battery

New Pro Video - New and Used Equipment

FJS International, LLC

The Slider

Willys Widgets

Wooden Camera

Rig Wheels Passport

Broadcast Solutions Inc

CineTape

Aerial Filmworks

Technodolly

Abel Cine

Gamma Ray Digital Inc

Media Blackout - Custom Cables and AKS

CineLab

Metropolis Post

Visual Products

CineTape

The Slider

Willys Widgets

Wooden Camera

New Pro Video - New and Used Equipment

Aerial Filmworks

Paralinx LLC

Rig Wheels Passport

Abel Cine

FJS International, LLC

Technodolly

Ritter Battery

rebotnix Technologies

Broadcast Solutions Inc

Glidecam

Tai Audio