Quitz of the day ( 4 )

[ninelives]

If the guide number for an ISO 100 film is 84, the guide number for an ISO 800 film would be ??

 

[Jed]

Eh, your formulas all very complicated lah. I can tell you the answer and it doesn't involve more than simple multiplication. No division, brackets, curly brackets, squares, square roots, cubes, cube roots, etc...

 

[erwinx]

yah so cheem, guesstimate can already:


84 x 1.4 x 1.4 x 1.4 = 230.

 

[shawntim]

what are you guys talking about ? what is a guide number?

 

[ninelives]

If the guide number for an ISO 100 film is 84, the guide number for an ISO 800 film would be ??

answer is GN2 = GN1*(SQUARE ROOT OF ISO2/ISO1)

:


800/100 = 8

square root of 8 = 2.83

84*2.828 = 238

GN2=200.

the iso 800 guide number will be 238.

 

[maddog]

geeks. wonder if knowing this kinda info will help you guys score with babes.

 

[ninelives]

must give complicated quiz mah, else time passes very slow.