Jump to content


Photo

split diopter effect


  • Please log in to reply
3 replies to this topic

#1 David Edward Keen

David Edward Keen
  • Basic Members
  • PipPipPip
  • 159 posts
  • Student
  • New York City

Posted 09 October 2015 - 07:14 AM

Is it necessary to use a split diopter lens on a simple dslr? are they even made? Might it be best to try it in post?
  • 0

#2 Mark Dunn

Mark Dunn
  • Basic Members
  • PipPipPipPip
  • 2763 posts
  • Other
  • London

Posted 09 October 2015 - 08:37 AM

A split dioptre is just half a close-up lens. You just screw it into the front of the camera lens.

If you can get enough DoF, of course, you don't need one, but that's more difficult with a large-sensor DLSR.

You can't increase DoF in post, a scene is either in focus or it isn't.


  • 0

#3 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 20159 posts
  • Cinematographer
  • Los Angeles

Posted 09 October 2015 - 10:51 AM

Yes, they sell split diopters for still cameras.  As Mark says they are just a regular diopter (close-up filter) cut in half so one side is clear.

 

Since the split diopter creates and image with two planes of focus, the only way to fake that in post would be to do a split screen shot, two separate takes where the focus is set in a different spot, combined in post with a soft split screen.  That's possible, but if it's a shot of two people talking it would be hard to get the two actors to be in sync with each other from two different takes unless there isn't a lot of back and forth.  The whole point of the split diopter filter is to do it in-camera.

 

As for it being "necessary on a DSLR" I'm not sure what that means.  You use the split-diopter when you want that effect of half the frame focused on one spot and the other half focused somewhere else.


  • 0

#4 David Edward Keen

David Edward Keen
  • Basic Members
  • PipPipPip
  • 159 posts
  • Student
  • New York City

Posted 09 October 2015 - 05:39 PM

Thanks, yeah I'm just jumping into lenses.

Edited by David Edward Keen, 09 October 2015 - 05:41 PM.

  • 0


Visual Products

Abel Cine

CineTape

The Slider

Wooden Camera

Glidecam

Ritter Battery

CineLab

Technodolly

Rig Wheels Passport

Willys Widgets

FJS International, LLC

Aerial Filmworks

Tai Audio

New Pro Video - New and Used Equipment

rebotnix Technologies

Media Blackout - Custom Cables and AKS

Paralinx LLC

Gamma Ray Digital Inc

Metropolis Post

Broadcast Solutions Inc

Wooden Camera

The Slider

rebotnix Technologies

Glidecam

Abel Cine

Aerial Filmworks

Visual Products

Ritter Battery

Willys Widgets

Broadcast Solutions Inc

FJS International, LLC

Media Blackout - Custom Cables and AKS

Paralinx LLC

Gamma Ray Digital Inc

New Pro Video - New and Used Equipment

Technodolly

Tai Audio

CineLab

Rig Wheels Passport

CineTape

Metropolis Post