On Thu, 22 Nov 2001, Jan van Wijk wrote: > Sure, the above might be true, but does not account for > the 1 to 2 stop difference you see. > > The LX keeps measuring DURING the automatic exposure, and closes the > shutter when enough light has accumulated. It does this using the reflection > on the actual film-surface wich is a medium gray.
Nope, the film surface is *not* a medium grey... not AFAIK anyway. The LX's black-and-white shutter curtains average out to be roughly medium grey, so the exposure you see in the viewfinder is the recommended shutter speed for the availalbe light, assuming that your subject is a medium grey. Film surfaces can vary by more than a stop in terms of reflectivity, so it's possible that the difference in times (assuming that the light remains constant) can be attributed to the reflectivity of the film itself differing from the medium grey of the shutter pattern. chris - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
