Contax Aria - P: Programmed Auto Exposure

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There are four interchangeable focusing screens
for Contax Aria: FU-3, FU-4, FU-5, and FU-6.
The screens have a 5 mm diameter circle in the
center marking the spot metering area (FU-3 and
FU-4 have a microprism as well).
@ Never touch the focusing screens because
they are machined to very high precision.
FU-4 (horizontal split-image/microprism
screen):
This screen is provided as standard on the
Contax Aria. This screen enables you to focus
using a center split-image spot, microprism collar
around it, and a surrounding matte area making it
suitable for a wide range of subjects.
FU-3 (45° split-image/microprism screen):
Essentially the same as the FU-4, this screen has
a 45° split image center spot ideal for focusing
images with horizontal lines since you do not
have to tilt the camera.
FU-5 (matte screen):
This screen consists of a matte area all around
and is suited for a relatively narrow-aperture lens
such as a long-focus lens. It is also suited for
close-up work and other situations when it is
difficult to focus with a microprism or split-image
spot.
FU-6 (sectioned matte screen):
It has ruled lines at 6mm intervals on a matte
screen and is especially suited for taking pictures
using perspective control with Auto Bellows or
PC Distagon or when it is necessary to precisely
determine a composition during copying work,
etc.