le carre de la distance

http://photography.tutsplus.com/articles/rules-for-perfect-lighting-understanding-the-inverse-square-law–photo-3483

 

GAMME LEE FILTER


216 – white diffision

– 1 Stop


416 – 3/4 diffusion

-0.8 stop


250 – 1/2 diffusion

-0.6 stop


450 – 3/8 diff

-0.3 stop


251 – 1/4 diff

-0.5 stop


252 – 1/8 diff

-0.3 stop


452 – 1/6 diff

-0.2 stop


400 – leelux

-1 stop


228 – brushed silk

-0.3 stop

http://www.leefilters.com/lighting/packs.html# 

a regarder frost a 2.29

grid cloth a 5.56 la ref 432…

 

430 – -1.2stop fuff diff

432 – -0,8stop – medium diff

434 – -0,4 stop – quarter

 

http://www.leefilters.com/lighting/colour-details.html#434&filter=dc