Jump to content




Photo

1.33:1 and 4:3 are same aspect ratio?


  • Please log in to reply
2 replies to this topic

#1 L K Keerthi Basu

L K Keerthi Basu
  • Basic Members
  • PipPipPip
  • 128 posts
  • Cinematographer
  • india

Posted 29 August 2015 - 11:15 AM

Dear friends,

 

 My short film Director is very much interested to shoot his short film in 1.33:1 ratio. We are planning to shoot in Red Dragon, some of my friends came up with a doubt that 4:3 and 1.33:1 are not the same aspect ratio and there will be a project issue will be there. Please clarify my doubt i can't able to sleep.

 


  • 0




#2 David Mullen ASC

David Mullen ASC
  • Sustaining Members
  • 18789 posts
  • Cinematographer
  • Los Angeles

Posted 29 August 2015 - 11:39 AM

This is just basic math, not cinematography.  4:3 and 1.33:1 are the same ratio of width to height, just divide 4 by 3 and you get 1.333333.... so it's the same ratio just expressed differently, 4:3 expresses it in whole numbers, 1.33 : 1 expresses it by keeping the vertical at a value of "1" and letting the horizontal not be a whole number.

 

This is a holdover from video versus film -- video aspect ratios are expressed in whole numbers (4:3, 16:9) and film aspect ratios are expressed with the vertical as a single unit, so 1.33 : 1, 1.85 : 1, etc.

 

Projection issues are a whole other thing though, you'd have to figure out how you were going to screen a 1.33 : 1 image -- probably with black borders on the sides of a 16:9 HD file or a 2K DCP.

 

Or you'd be making a transfer to 35mm for projection on a print, but if you have sound on the print, the actual projection aspect ratio would be 1.37 : 1 Academy and you'd have to make sure your theater could screen the Academy print format, otherwise you may have to transfer the 1.33 : 1 image with a windowbox within 1.85 : 1 print area so that a theater set-up to project only 1.85 flat or 2.40 scope could show it properly.


  • 0

#3 L K Keerthi Basu

L K Keerthi Basu
  • Basic Members
  • PipPipPip
  • 128 posts
  • Cinematographer
  • india

Posted 29 August 2015 - 11:47 PM

Thank you David, my final projection format is going to be both in 16:9 HD and 2K DCP.


  • 0


Abel Cine

CineLab

The Slider

Paralinx LLC

Glidecam

Aerial Filmworks

Zylight

Visual Products

Ritter Battery

Tai Audio

CineTape

Technodolly

Broadcast Solutions Inc

Pro 8mm

rebotnix Technologies

Willys Widgets

Rig Wheels Passport

Willys Widgets

Broadcast Solutions Inc

Ritter Battery

Aerial Filmworks

Tai Audio

rebotnix Technologies

Zylight

Abel Cine

CineTape

The Slider

Pro 8mm

Paralinx LLC

CineLab

Technodolly

Rig Wheels Passport

Visual Products

Glidecam