Henry Posner wrote:
At 09:35 AM 1/31/2003 +0100, you wrote: >If you have a Wallace Expo DIsc >you can validate the accuracy of your camera. >I did and my EOS3 is dead on, <Dead on> at every ISO and in the complete range from midnight to "so bright I gotta wear shades?" unusual if so. ---------------------------------------------------------------------------- ------------- Henry, Henry, Henry, You should not knock something you have never used. The disc is very simple to use and what it tests is the "meter" in the camera and not the processing of the light the camera uses to render exposure such as multi-segment metering. What you do is simply dial in ISO 100, put disc over lens and point it at the sun (yes, the sun). You can then gauge if the meter in your camera is off following the expo disc instructions. I use average metering for this and as I said it works fine. I had one maybe 12 years ago and found that the cameras I was using at the time were actuially off by 1/3 to 2/3 stops. I subsequently had the meters in the adjusted and it did make a difference (I shot slide flim). Mr. Wallace may not be producing these much longer as last I knew he was in poor health. He was a student of Ansel Adams and studied with him in 1946-7. If nothing else, he knows exposure. Peter K * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
