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PAR vs Compact


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#1 christian mann

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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


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#2 Jay Young

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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. 


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#3 Alexandros Angelopoulos Apostolos

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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?


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#4 Jay Young

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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. 


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#5 christian mann

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Posted 02 September 2016 - 09:05 AM

hey,

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

 

and I don't mind homework :)


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Visual Products

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rebotnix Technologies

The Slider

Pro 8mm

Abel Cine

Rig Wheels Passport

Willys Widgets

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Broadcast Solutions Inc

Tai Audio

CineTape

Zylight