Flash light in terms of Lumen?


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maisatomai

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Oct 26, 2006
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#1
Some Surefire torch has max output of 200 Lumen.

I am stupid and flash my Canon external flash directly on my eye in bright sunlight. I am amazed I was instantly blinded by the flash for a minute. Just wondering will the flash have this 200 lumen?
 

Rashkae

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Nov 28, 2005
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#2
so hard to do a search on google for "lumens of a flash"?
 

Octarine

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#3
so hard to do a search on google for "lumens of a flash"?
Agree, since it's much more economical: it's faster to type and one gets more answers in a couple of seconds.
 

maisatomai

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#4

Rashkae

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Nov 28, 2005
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I tried but it does not give me the answer leh

http://www.google.com.sg/search?hl=...US:official&q=lumen+of+a+flash&meta=&aq=f&oq=

I think is because maybe flash is not define in terms of lumen
Eh. You can't click a link? The VERY FIRST search result, the VERY FIRST LINK there tells you the formula and sample answers:

http://www.candlepowerforums.com/vb/showthread.php?t=170622
 

maisatomai

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#6
PS, never read it properly. Btw, I realised it is much more than a normal tactical torch. No wonder I remained "blind" for quite a while.
 

Rashkae

Senior Member
Nov 28, 2005
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#7
PS, never read it properly. Btw, I realised it is much more than a normal tactical torch. No wonder I remained "blind" for quite a while.
Of course. Lumens are measured over time, so a torch is designed for constant output. A flash, as the name implies, is designed for maximum output over a fraction of a second.
 

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