Jump to content


Photo

toe-in(stereoscopic question)


  • Please log in to reply
4 replies to this topic

#1 michael abraham

michael abraham
  • Basic Members
  • PipPip
  • 36 posts
  • Other
  • London

Posted 18 July 2009 - 04:43 AM

Hello,

special 3D stereoscopic question:

is it better toe-in on the lens' nodal point,film plane or camera's body?
If the convergence(toe in) can be adjust on the lens' nodal point or film plane,will the keystone effect be improved?

Thanks a lot :rolleyes:
  • 0

#2 Russell Scott

Russell Scott
  • Basic Members
  • PipPip
  • 42 posts
  • Other

Posted 21 July 2009 - 08:01 PM

Hello,

special 3D stereoscopic question:

is it better toe-in on the lens' nodal point,film plane or camera's body?
If the convergence(toe in) can be adjust on the lens' nodal point or film plane,will the keystone effect be improved?

Thanks a lot :rolleyes:


can I suggest you don't toe-in at all? then you'll have no keystone effect...

if you do toe-in, you'll need to find the film plane - assuming we're using the same terminology :lol:
  • 0

#3 michael abraham

michael abraham
  • Basic Members
  • PipPip
  • 36 posts
  • Other
  • London

Posted 24 July 2009 - 03:59 AM

can I suggest you don't toe-in at all? then you'll have no keystone effect...

if you do toe-in, you'll need to find the film plane - assuming we're using the same terminology :lol:



Hi Russel,

thanks for your reply.
as you know there are different point of view.I prefere don't toe-in and do it in post but there are different stereographer that prefere do it in shot.This was the reason for my question.
I don't understend your last sentence(about film plane).Could you explain it to me please?
My question was:what is it the right point(pivot/rotation point)to toe-in the camera?

All the best!!!
  • 0

#4 Olex Kalynychenko

Olex Kalynychenko
  • Basic Members
  • PipPipPipPip
  • 868 posts
  • Cinematographer
  • Dnepropetrovsk, Ukraine

Posted 24 July 2009 - 04:39 AM

for note, russian stereoscopic
http://www.stereokino.ru/ennews.htm
  • 0

#5 Russell Scott

Russell Scott
  • Basic Members
  • PipPip
  • 42 posts
  • Other

Posted 26 July 2009 - 09:35 PM

Hi Russel,

thanks for your reply.
as you know there are different point of view.I prefere don't toe-in and do it in post but there are different stereographer that prefer do it in shot.This was the reason for my question.
I don't understend your last sentence(about film plane).Could you explain it to me please?
My question was:what is it the right point(pivot/rotation point)to toe-in the camera?

All the best!!!


yes I figured you'd say that (about hte toe-in/ no toe-in :P )

my answer was that, as long as we're using the same phrases, the film plane is the correct rotation point. (I've never called it a 'film plane" so I'm assuming what you mean by that). Having said that, your keystone won't be improved, but your stereo would be.
Keystoning is a result of the vertical parallax that toe-in introduces, so while the keystoning would be more accurate when you identify the correct rotation point, it doesn't follow that by correctly rotating , your keystoning would be reduced.

an example would be if your original rotation point caused you to effectively rotate the cameras *less*. if that happened, your correct toe-in would increase the keystoning.
  • 0


Rig Wheels Passport

Media Blackout - Custom Cables and AKS

Tai Audio

The Slider

Technodolly

Aerial Filmworks

CineTape

Gamma Ray Digital Inc

Paralinx LLC

Visual Products

Wooden Camera

Metropolis Post

Opal

Willys Widgets

Glidecam

rebotnix Technologies

Abel Cine

Broadcast Solutions Inc

CineLab

FJS International, LLC

Ritter Battery

Ritter Battery

Glidecam

The Slider

CineTape

Broadcast Solutions Inc

Visual Products

Metropolis Post

Aerial Filmworks

FJS International, LLC

Abel Cine

Technodolly

Media Blackout - Custom Cables and AKS

CineLab

Wooden Camera

rebotnix Technologies

Paralinx LLC

Gamma Ray Digital Inc

Opal

Rig Wheels Passport

Tai Audio

Willys Widgets