active display area 4.80mm x 3.60mm (0.24" diag) contrast ratio 60-110 optical transmittance 5.5-6.5% flicker -40db inter column flicker -40db image retention time 60s chromatic uniformity - .002-.01 u',v' color gain 2000-2500K typical backlight color temp - 8000K normal optic used in a viewfinder is - high index PCX 12x aspheric optic which provides a crystal clear 16 degree field of view field of view tan[theta]=heightofdisplay/focaldistance mirror turned 45 degrees would be smaller horizontaly, so we need to compensate, proper dimensions should be minimum 6.79 horiz 3.60 vert 7.69 diag