Jump to content


Photo

Measuring focus distance


  • Please log in to reply
5 replies to this topic

#1 Nick Norton

Nick Norton
  • Basic Members
  • PipPipPip
  • 248 posts
  • Student
  • Chicago

Posted 04 October 2008 - 08:03 PM

What do you guys typically use as a starting point on the camera when measuring your focus distance?



Thanks-
Nicholas
  • 0

#2 Alex Worster

Alex Worster
  • Basic Members
  • PipPipPip
  • 113 posts
  • Film Loader

Posted 04 October 2008 - 08:08 PM

The image plane, 99% of the time.
  • 0

#3 Jonathan Bowerbank

Jonathan Bowerbank
  • Basic Members
  • PipPipPipPip
  • 2815 posts
  • 1st Assistant Camera
  • San Francisco, CA

Posted 05 October 2008 - 01:14 AM

There are exceptions, some video cameras I hear you have to measure from the front of the lens. I've never worked with those cameras myself, and can't name which ones...but someone here knows ;)
  • 0

#4 Stephen Williams

Stephen Williams
  • Sustaining Members
  • 4708 posts
  • Cinematographer
  • Europe

Posted 05 October 2008 - 03:41 AM

There are exceptions, some video cameras I hear you have to measure from the front of the lens. I've never worked with those cameras myself, and can't name which ones...but someone here knows ;)


Hi,

Most Eng zooom lenses.

Stephen
  • 0

#5 Nick Norton

Nick Norton
  • Basic Members
  • PipPipPip
  • 248 posts
  • Student
  • Chicago

Posted 18 October 2008 - 02:19 PM

Didn't want to post another topic since i have already posted so many...


I'm having a real difficulty with figuring out how the different lens mounts are supposed to work on the Eclair ACL.

I have the Eclair CA mount right now, but am i supposed to remove this to find a C mount behind it?

I don't want to damage my camera trying to remove the mount without knowing the proper way to do so.


Any help would be appreciated-
Nicholas
  • 0

#6 Saul Rodgar

Saul Rodgar
  • Basic Members
  • PipPipPipPip
  • 1682 posts
  • Cinematographer

Posted 18 October 2008 - 02:33 PM

The smaller port on the actual camera (where the mirror is visible) should be a C-mount. You don't have to move the CA mount to see it. If the camera has screws securing the CA to Arri S or B mount, CAREFULLY remove the screws and that should do it

So you can use most 2/3 inch C mount lenses for 16 or 1 inch for S16. There is bevy of C AND CA mount to you-name-it mount adapters: Nikon, Canon EF, Minolta, Leica, PL, Aaton, to name a few.

Some techs, like http://www.lesbosher.co.uk can manufacture pretty much any CA or C mount adapter you can think of, for a price. Or try eBay.

Edited by Saul Rodgar, 18 October 2008 - 02:38 PM.

  • 0


Willys Widgets

The Slider

Wooden Camera

Paralinx LLC

Tai Audio

rebotnix Technologies

Broadcast Solutions Inc

Abel Cine

Glidecam

Media Blackout - Custom Cables and AKS

Ritter Battery

Technodolly

Metropolis Post

Rig Wheels Passport

FJS International, LLC

Visual Products

Opal

CineLab

CineTape

Gamma Ray Digital Inc

Aerial Filmworks

Paralinx LLC

Rig Wheels Passport

Tai Audio

CineTape

Visual Products

FJS International, LLC

Willys Widgets

Gamma Ray Digital Inc

Aerial Filmworks

Media Blackout - Custom Cables and AKS

Ritter Battery

Metropolis Post

Broadcast Solutions Inc

Wooden Camera

The Slider

Technodolly

Abel Cine

rebotnix Technologies

Opal

Glidecam

CineLab