Peter,
I didn't notice when I first read your post, but, looking back,
you do seem to have them backwards.
So I don't add to the confusion by getting something wrong, this
is from Ansel Adams' "The Print":
"...some enlargers, known as the diffusion type, interpose between
lamp and negative a sheet of cloudy glass that spreads light
uniformly. This diffusion system causes some loss of light;
however, it scatters light rays in many directions and much of the
light, consequently, never reaches the enlarger lens. It also
gives a gently diffused appearance to the print. Many
photographers like this effect, particularly for portraits, but
such softening of detail may be objectionable when small negatives
must be greatly enlarged.
"Most enlargers designed for 35mm and other small film sizes
commonly used by amateurs spread light uniformly over the negative
with "condenser" lenses (and are called condenser enlargers).
Between lamp and negative are two saucer-shaped lenses that
concentrate the lamp's light so that it passes straight through
the negative. Most of the light reaches the lens, increasing
efficiency. The straight-line passage also yields crisp detail,
since light rays from different points in the negative do not
overlap one another."
Walt
__________________________________________________________________
"Men never do evil so completely and cheerfully as when they do it
from religious conviction." -- Blaise Pascal, theologian
---------- Original Message ----------------------------------
From: petertje@xxxxxxxxxxxxx
Reply-To: olympus@xxxxxxxxxxxxxxx
Date: Thu, 13 Nov 2003 23:29:36 +0200
>
>Hi Walt,
>
>>Actually, it's exactly the opposite. Condenser enlargers are
>>generally sharper and contrastier. Diffusion enlargers
>>minimize the effects of dust and scratches on the negative.
>
>Did I just mix up the two types entirely (giving them just the
wrong names), or did I explain them correctly but was my
conclusion about the sharpness wrong ?
>
>
>
>Peter.
>
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