Apple classic ii.performa 200 Servicehandbuch

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 Adjustments
Light Meter Setup - 2
 
from the lens. 
Three scales are shown on 
the light meter:
• 200-1000 fc
• 50-250 fc
• 10-50 fc
Because display screen 
luminance typically ranges 
from 10 to 50 fc, take 
readings from the bottom 
scale only.