Hello,
Norma Foltz or Hank Hogan wrote:
> I think this is a case of Ultraviolet sensitivity of color film and
> I would guess that you did not use any type of UV absorbing filter
> over the Zuiko 180 mm lens.
> Ultraviolet can cause just the sort of effects that that you showed with
> those nice images of the brunette in the white top and khaki skirt.
> I don't think this is a case of chromatic abberation -- the focus of different
> wavelengths at different plane.
I was always sceptic about that UV theories, but you let me rethink
that. An light source intensiv enough, like a spectacular highlight
might emit enough UV light to cause this effect. I always wondered
why people only observe an blue cast, "ordinary" chromatic
aberrations would have produced red coloured fringes as well (as
could have been seen in that horrible EOS lens).
> Single coated lenses transmit more ultraviolet light than multicoated lenses.
> Most of the time ultraviolet does not cause a problem but on bright sunny days
> or other bright illumiation ultraviolet effects show up.
The 180mm Zuiko has only 5 lens elements, much less UV absorbtion than
an zoom lens or an 180mm/2.0 Zuiko.
I like to add my 180mm Zuiko has a new front element, when I bought it,
the front element was scratched. So maybe, this has a stronger UV
eliminating effect.
Best regards
Richard
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