Jump to content



Photo

PAR vs Compact


  • Please log in to reply
4 replies to this topic

#1 christian mann

christian mann
  • Basic Members
  • PipPip
  • 53 posts
  • Student

Posted 01 September 2016 - 09:38 AM

Hey,

 

a quick beginners questions...:

 

how much more "power" does a 4KW PAR have vs a 4KW Compact ? Can't find the relevant data online...

 

Thaaaaaanx

M


  • 0

#2 Jay Young

Jay Young
  • Basic Members
  • PipPipPipPip
  • 456 posts
  • Cinematographer
  • Lexington KY

Posted 02 September 2016 - 04:27 AM

Compact has 96 footcandles at 45 feet on full flood

 

PAR has 135 footcandles at 45 feet on full flood

 

I found this information using the Arri Photometric calculator - and you can too: http://calc.arri.de/calculator

 

The reason, I think, is because the Compact has a wider beam angle (61-degrees) vs. the PAR (52-degrees).  

 

The PAR is the more concentrated source, even at flood. 

 

This smells like homework. 


  • 0

#3 Alexandros Angelopoulos Apostolos

Alexandros Angelopoulos Apostolos
  • Basic Members
  • PipPipPipPip
  • 406 posts
  • Student
  • Athens

Posted 02 September 2016 - 06:00 AM

 

This smells like homework. 

 

People really hate it if it’s homework. don’t they. Or perhaps they just need to point out that it’s homework. I wonder why that is? Does it bother you that much?


  • -1

#4 Jay Young

Jay Young
  • Basic Members
  • PipPipPipPip
  • 456 posts
  • Cinematographer
  • Lexington KY

Posted 02 September 2016 - 06:55 AM

 

People really hate it if it’s homework. don’t they. Or perhaps they just need to point out that it’s homework. I wonder why that is? Does it bother you that much?

 

Doesn't really bother me, but I find learning what something is called (Photometeric Data) helps one remember it for future use. 

 

Now chances are that I answered the specific question, the OP didn't actually learn anything - I am hoping he will follow that link and play with the program, learning about photometric data in the process. 


  • 0

#5 christian mann

christian mann
  • Basic Members
  • PipPip
  • 53 posts
  • Student

Posted 02 September 2016 - 09:05 AM

hey,

thanks! that does help. didn't know the app yet.

 

and I don't mind homework :)


  • 0


Aerial Filmworks

Pro 8mm

CineLab

Broadcast Solutions Inc

CineTape

Tai Audio

The Slider

rebotnix Technologies

Paralinx LLC

ZoomCrane

Glidecam

Technodolly

Gamma Ray Digital Inc

Ritter Battery

Abel Cine

Metropolis Post

Media Blackout - Custom Cables and AKS

Rig Wheels Passport

Willys Widgets

FJS International, LLC

Visual Products

Quantum Music Works

Quantum Music Works

Visual Products

Ritter Battery

Metropolis Post

Rig Wheels Passport

CineTape

Technodolly

Tai Audio

Media Blackout - Custom Cables and AKS

Abel Cine

Aerial Filmworks

Pro 8mm

CineLab

The Slider

rebotnix Technologies

ZoomCrane

Willys Widgets

Paralinx LLC

FJS International, LLC

Broadcast Solutions Inc

Glidecam

Gamma Ray Digital Inc