Hans
Good job. I think you've put it to rest: the 300/4.5 *does* have some sort
of special glass. In fact it has the same type of EPD glass as the 250/2,
350/2.8 ... I can vouch that it takes great photos!
George
>For what it's worth, here is how the glass of the 300/4.5 is described in
The OM
>System Lens Handbook:
>
>"The front of the lens features a luxurious 4-elements in 3-groups
construction,
>with a combination of high refractive index glass and extraordinary partial
>dispersion glass to greatly reduce chromatic aberrations."
>
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