Re: Portra Portra

----- Original Message -----
From: "Tom Miller" <twmiller@mr.net>

> same way as the Pro100T. Shooting in daylight, the Portra 100T has a
> strong blue cast throughout the light areas of the image

Here is possible explanation:

Blue wavelength scatters more than Red (at the opposite end of the visible
spectrum), that's why the sky looks Blue. ZonePlate imaging is based on
diffraction of light and it is possible that Blue wavelength also diffracts
more than Red, causing your blue cast images. The characteristic zoneplate
effect is more noticeable on the highlights of the image, so it makes sense
(2me) you noticing more blue cast on the light areas.

Guillermo.
Theoretically: a geek
Practically: a normal pinholer (whatever that is!!)
:-)
Received on Thu Mar 22 07:45:24 2001