Jump to content


Photo

Normal focal length?


  • Please log in to reply
3 replies to this topic

#1 David Bradley

David Bradley
  • Basic Members
  • PipPipPip
  • 159 posts
  • Other
  • London UK

Posted 03 April 2007 - 07:02 PM

Anyone know what focal length would create a relatively objective image on a DSR 570 WS 16:9 2/3" CCD camera?

Best

David Bradley
  • 0

#2 Michael Nash

Michael Nash
  • Sustaining Members
  • 3330 posts
  • Cinematographer
  • Pasadena, CA

Posted 03 April 2007 - 07:43 PM

Seems we just had this thread recently...

It depends on both what you consider "normal" and what you want to compare it to. A 23mm lens on a 2/3" 16x9 chip gives you similar angle of view to a 50mm lens on 35mm Academy 1.85:1.

This may help: http://www.panavisio...lenseqvform.asp

But in a pinch just remember that 2/3" optics behave rather like 16mm, using focal lengths close to 1/2 that of 35mm. From there you have to adjust your figure up or down a bit depending on what you're comparing (which aperture/format of 35mm, which aperture of 16mm, and which shape 2/3" chip).
  • 0

#3 David Bradley

David Bradley
  • Basic Members
  • PipPipPip
  • 159 posts
  • Other
  • London UK

Posted 04 April 2007 - 08:14 AM

Thanks Micheal. I should have phrased the question better I suppose. Director wanted I POV using a 2/3" CCD 16:9 and I wanted to be sure I could find a relatively objective focal length before photography commences.
  • 0

#4 Michael Nash

Michael Nash
  • Sustaining Members
  • 3330 posts
  • Cinematographer
  • Pasadena, CA

Posted 04 April 2007 - 03:39 PM

Unless you're renting HD primes, a good SD zoom should give you the focal lengths you need. For your purposes I would pick a wide zoom, like a 5.5 or so.
  • 0


Glidecam

FJS International, LLC

Aerial Filmworks

Visual Products

New Pro Video - New and Used Equipment

Willys Widgets

Broadcast Solutions Inc

Metropolis Post

Ritter Battery

Gamma Ray Digital Inc

Paralinx LLC

Tai Audio

rebotnix Technologies

Rig Wheels Passport

CineTape

CineLab

Wooden Camera

The Slider

Media Blackout - Custom Cables and AKS

Abel Cine

Technodolly

Tai Audio

Media Blackout - Custom Cables and AKS

CineTape

Gamma Ray Digital Inc

Abel Cine

Broadcast Solutions Inc

FJS International, LLC

The Slider

Willys Widgets

Metropolis Post

Aerial Filmworks

rebotnix Technologies

Visual Products

Wooden Camera

CineLab

Ritter Battery

New Pro Video - New and Used Equipment

Rig Wheels Passport

Glidecam

Technodolly

Paralinx LLC