As per the Olympus Sales Information File:
24mm Shift: special low diffusion
40mm f/2: high refractive, low dispersion
100mm f/2: special low dispersion and extraordinary partial dispersion
180mm f/2: special low dispersion and unique dispersion
250mm f/2: special low dispersion and extraordinary partial dispersion
300mm f/4.5: high refractive index and extraordinary partial dispersion
350mm f/2.8: special low dispersion (2 elements) and extraordinary
partial dispersion ( 1 element)
100-200mm f/5: low color dispersion
20mm f/2: high refractive index, low dispersion
1.4x-A: special glass
Sure doesn't clarify the situation . . .
Gary Reese
Las Vegas, NV
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