Workable speed

[Symon <foz1kww@xxxxxxxxxxxx>]

>How does rating the film at EI 1600 translate to an INCREASE in exposure of
>3.5 to 4 stops?   It seems to me that you would be severely underexposing
>the film.
>Um...do you meter through the 87C filter?   This would make sense then.  I
>typically meter through a 29B (H+W 92) at EI of about 1000.

It's just my experience. I measured the light without covering by the 87C
filter. Actually, it's a testing roll for the mentioned speed. A
relationship between the measured readings and the "proper" exposure values
was found to be "an increase in EV of 3.5 to 4 stops".


regards,
Symon

*
****
*******
******************************************************
*  To remove yourself from this list, send:          *
*         UNSUBSCRIBE INFRARED                       *
*       to                                           *
*         MAJORDOMO@xxxxx                            *
*----------------------------------------------------*
*   For the IR-FAQ, IR-Gallery and heaps of links:   *
*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
******************************************************