Jump to content


Photo

Comparison of Field of View.


  • Please log in to reply
5 replies to this topic

#1 Luke Sweetman

Luke Sweetman
  • Basic Members
  • PipPip
  • 11 posts
  • Student

Posted 26 March 2010 - 05:10 AM

Hi

I am going to be shooting a project on the Red 1 Camera at the end of April, the project consists of one long tracking shot, recorded at 120fps.

My issue is that I won't be getting the camera till the day before we shot, so what I want to know is how to workout the equivalent angle of view on the Sony EX 3 lens with a couple of the Red's Pro Primes.

Basically it is a very small budget, and as the concept calls for just the one shot I figure if I get the right lens then we can limit the rental to either 25mm or 35mm red pro prime.

I have done a number of tests with the EX-3, and it seems that it's widest setting is just wide enough, this is the info from the sony product page;

Focal Length f = 5.8 to 81.2 mm (equivalent to 31.4 to 439 mm on 35 mm lens)


and from Red/Lenses;

25mm: H x V. FOV for S35 Format = 55.8 x 31.1 (degrees).
35mm: H x V. FOV for S35 Format = 41.4 x 22.5 (degrees).

If anyone knows where could get the info?

thanks

Luke
  • 0

#2 Pete Wallington

Pete Wallington
  • Basic Members
  • PipPip
  • 21 posts
  • Cinematographer

Posted 26 March 2010 - 05:24 AM

If in doubt, go for the wider lens. Sounds like the 25mm should cover you.

HOWEVER (this is a BIG however!)

If you want to record at 120fps you will have to knock the resolution down to 2K on the Red ONE. This in turn means that you'll be effectively "halving" your field of view so the field of view is similar to 16mm rather than 35mm. Thus to achieve the same FOV as a 25mm lens you will need a 12mm lens. The Red Pro Primes obviously don't go down below 18mm, you are better looking at lenses made for shooting 16mm rather than 35mm lenses.

Hope that makes sense.

Edited by Pete Wallington, 26 March 2010 - 05:25 AM.

  • 0

#3 Brian Drysdale

Brian Drysdale
  • Basic Members
  • PipPipPipPip
  • 5070 posts
  • Cinematographer

Posted 26 March 2010 - 06:10 AM

Check out the Panavision knowledge base's angle of view

http://www.panavisio...lenseqvform.asp
  • 0

#4 Luke Sweetman

Luke Sweetman
  • Basic Members
  • PipPip
  • 11 posts
  • Student

Posted 26 March 2010 - 01:19 PM

Thanks

That dose help, I just spoke to a guy that owns a Red 1 and he told me the same. That when in 2K 120fps, you should use 16mm lens to prevent

vignetting, just wondering if someone could recommend a good 16mm or 25 prime that is compatible with the Red, the rental place has good selection of

Ziess and Cookie primes.


Much obliged for your words
  • 0

#5 Chris Keth

Chris Keth
  • Sustaining Members
  • 4427 posts
  • 1st Assistant Camera
  • Los Angeles

Posted 26 March 2010 - 05:33 PM

Thanks

That dose help, I just spoke to a guy that owns a Red 1 and he told me the same. That when in 2K 120fps, you should use 16mm lens to prevent

vignetting, just wondering if someone could recommend a good 16mm or 25 prime that is compatible with the Red, the rental place has good selection of

Ziess and Cookie primes.


Much obliged for your words


I'd go with ultraprimes. They're sharp, fast, and relatively lightweight.
  • 0

#6 Noah Yuan-Vogel

Noah Yuan-Vogel
  • Basic Members
  • PipPip
  • 23 posts
  • Cinematographer
  • New York, NY

Posted 03 April 2010 - 09:25 PM

Thanks

That when in 2K 120fps, you should use 16mm lens to prevent vignetting,


Using a lens with a smaller image circle doesn't seem likely to prevent vignetting. They are much more likely to cause vignetting. Perhaps you misheard him? Using a 16mm lenses when shooting 2k can be beneficial for other reasons, however. One reason being that shooting wide angles will be possible with 16mm lenses at 2k.

Also, keep in mind that the 35mm equivalents referenced in the EX1/3 specs refer to full frame 35mm (still film) field of views. By my calculations the EX1/3 stock lens is equivalent to about a 20mm lens on a RED One depending somewhat upon whether you are shooting 4k 4.5k or quadHD etc.
  • 0


Rig Wheels Passport

CineTape

The Slider

Willys Widgets

Media Blackout - Custom Cables and AKS

Technodolly

Opal

CineLab

Abel Cine

Visual Products

FJS International, LLC

rebotnix Technologies

Gamma Ray Digital Inc

Tai Audio

Metropolis Post

Paralinx LLC

Broadcast Solutions Inc

Glidecam

Ritter Battery

Aerial Filmworks

Wooden Camera

Gamma Ray Digital Inc

Abel Cine

Broadcast Solutions Inc

Wooden Camera

Paralinx LLC

Willys Widgets

Rig Wheels Passport

FJS International, LLC

The Slider

Metropolis Post

Ritter Battery

CineLab

Tai Audio

CineTape

rebotnix Technologies

Visual Products

Aerial Filmworks

Technodolly

Opal

Media Blackout - Custom Cables and AKS

Glidecam