Operating Instructions

13
12. GROUNDGLASS FOCUSING
(classic and 2000)
CONTROL ACCESSORIES:
For precise focusing, without interference from stray light, the use of the
FOCUSING/METERING BELLOWS 45 (Code 002503) or the RIGHT ANGLE
REFLEX ATTACHMENT (Code 002628) is recommended.
Both these being exchangeable against the focusing hood.
Groundglass focusing and composition is required when camera adjustments
become necessary.
After setting the lens for infinity, the between-the-lens-shutter is opened. By
pushing the snap button (41) towards the center of the focusing hood cover,
the focusing hood snaps open by spring tension. The focusing hood prevents
stray light, so that a clear easily observable ground glass image becomes visi-
ble. It is always recommended to determine critical sharpness by means of a
FOCUSING MAGNIFIER. Before using the magnifier, fold away the focusing
hood. The focusing hood frame is held in place by a snap button; it is opened
by pulling on the grooved tab (43). After opening, the focusing hood may be
removed entirely by pressing the focusing hood frame to the right, so that it
disengages from its spring loaded hinge.
GROUNDGLASS:
In architectural photography the groundglass
with centimeter grid greatly facilitates to check
on vertical and horizontal lines. The multi format
groundglass is supplied with scoring for all roll-
film formats – 6x7, 6x9, 6x12 cm –, sheet film
9x12 cm and 4x5 inch (total area).
FRESNEL SCREEN 45:
A very desirable accessory, especially when using short focus (wide-angle)
lenses, is the FRESNEL SCREEN 45 (Code 002522). It provides a uniform
brightness of the groundglass image, even on its edges, so that focusing and
composition are greatly facilitated.
MOUNTING INSTRUCTION OF
FRESNEL SCREEN:
The FRESNEL SCREEN is placed over the
groundglass with the grooved side towards
the lens. Rotate top and bottom retaining clips
(37a and 37b) sideways, place FRESNEL
SCREEN over the groundglass and return
retaining clips to their original position.