The Superwide Cameras
Information in this chapter is limited to the operations that apply specifi cally to Superwide
models. Basic camera operations that apply to all V system cameras are discussed in other
chapters.
BASIC CAMERA OPERATION
Cameras made since 1980 advance the fi lm either with a ratchet-type motion (necessary
when the instant fi lm magazine is attached) or with a full turn on the crank. When you press
the release, the shutter in the lens simply opens and closes for the set exposure time. It is
not necessary to keep the release pressed when you use the longer shutter speeds. For time
exposures use a cable release and use the release lock on the cable if it exists. The T position
on the camera’s release lock is helpful when you evaluate the image on a focusing screen
adapter. You do not have to keep your fi nger on the release.
THE SUPERWIDE FOR DIGITAL IMAGING
Since the Superwide camera model was introduced in 1954 it was recognized as a superb
tool for high quality wide angle photography because of the extreme 90-degree angle of view,
the superb image quality, and extremely low distortion value of the Carl Zeiss Biogon lens.
The Superwide is still a great camera for critical, high quality wide angle photography but
only in fi lm photography. The latest 905SWC model has a Biogon lens with a slightly different
lens and barrel design to reduce the possibility of fl are to the highest degree, but otherwise it
is identical to the 903SWC (see Figure 11-1).
As discussed in Chapter 14, the Biogon is an optically true wide angle lens design that
must be positioned very close to the image plane (see Figure 11-4). The rear element of the
Biogon is only about an inch from the image plane. This does not create a problem in fi lm
photography but it does in digital imaging because of the IR fi lter and sensor cover glass that
is in front of the sensor (the image plane).
The light rays that go to the corner of the image enter the fi lter and the glass at an oblique
angle. As a result they have to travel a different distance than without the glasses in fi lm pho-
tography (Figure 11-2).The spherical aberration introduced by the cover glass and the IR fi lter
11
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