Originally posted by LesDMess That is the
working range. The actual sensitivity of the detector is much less. I know this is a fine distinction, but it makes a big difference if you are needing to figure reciprocity failure into the equation (see comment above). For that you need to know the exposure time before you trigger the shutter.
As for the Luna Pro SBC specs...you are correct. I copied the values for the calculator scale on the meter rather than the sensitivity spec a few lines above:
Exposure Value Range -8 to +24
I would point out that the lower number does represent the actual lower limit of meter sensitivity at EV(100). Here is the section you are referring to:
EV Range ASA 25 - 6 + 15
The numbers you quote are those for EV(25). Drop two stops on the low end to -8 for EV(100). EV(100) is the general standard to be assumed if the ISO is not explicitly stated and such is the case for most camera meter specifications. I know this sounds sort of weird. One would think that a certain amount of light would be the same regardless of film speed. Unfortunately, EV is based on exposure (shutter speed/aperture combo) with ISO added as an implicit factor if you are attempting to provide light quantification.
In any case...There is no doubt that the automated exposure system in the LX is a wonderful thing and is one of the factors that make that camera so very desireable.
Steve