6 x 9 etc.

len

Well-Known Member
Is that a leko measurement? If so, can anyone point me to a conversion chart so I can learn what it is?

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gafftaper

Senior Team
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Altman still makes and sells a lot of 360Q's. They list for about \$120 less than a Source 4 so it's a good choice when money is tight. There's nothing wrong with them, it's solid older technology. Grog's numbers are a close approximate but they aren't exactly correct. A 4.5X6.5 is 47 degrees, 6X9 is 34.3 degrees, a 6X12 is 24 degrees, 6X16 is 16.7 degrees, 6X22 is 11 degrees

Altman 360Q cheat sheet to calculate the size of the area of light:
For a 4.5X6.5 multiply throw distance by: .88
For a 6X9 multiply throw distance by: .62
For a 6X12 multiply throw distance by: .41
For a 6X16 multiply throw distance by: .29
For a 6X22 multiply throw distance by: .19

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ship

Senior Team Emeritus
Some of us still have to convert back to 6x9 etc. measurements when considering stuff like 50 degree fixture beam spread. I know what a 6x9 would look like at X distance... It's what I was raised with.

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