On 7 Nov 2002 at 16:58, William Robb wrote: > I do wonder if it isn't some sort of noise (for lack of a better > word) caused by the mirror movement. Something like a very small > static charge could, I suppose, cause the timing circuit (which > goes through the iso resistor) to goof the exposures. > Something like this would affect the camera more when the meter > is set to it's most sensitive setting. > Did anyone else run this test with the mirror locked? And if so, > was the camera more repeatable?
It does sound like a very reasonable explanation, the areas that could be affected are the ISO resistor array and the aperture position resistor array. The system is analogue and at the settings at which the problem occurs it is at the extremes. The LX metering system is wholly undamped so that it can respond near instantaneously to electronic flash so any very short duration discontinuity could potentially throw the metering out of spec. Also the original design only accommodated ISO1600 films at the fastest, I believe the retro-fit to my old one was simply the addition of a new ISO dial with a longer resistor array, no other circuit components were changed. I will test mine with the mirror up and report the results when I find some spare time. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://members.ozemail.com.au/~distudio/publications.html
