Rewind Release Ring (4) is still turned fully clockwise and the three dots are properly aligned. This will ensure
correct operation of shutter and exposure counter in subsequent pictures.
Your cameras Tripod Bush accepts a standard 1/4 in Whitworth screw. When fitting a tripod or other bush-
mounted accessory (e.g. flash bar) care should be taken to see that this is screwed in just finger-tight only (this
applies to the carrying-case retaining-screw also). If there is a safety locking -nut on the accessory, turn the
main screw up to three revolutions only, then hold it in position and lock into place with the safety nut.
Apertures:
The Hellos 44M,the standard lens supplied with
the Zenith TTL camera, is designed to be used in
Automatic or Manual mode. When the
Auto/Manual Switch (23) is set to 'A, the aperture
remains fully open for viewing and focusing and
closes down automatically to a pre-selected
f/number value when the Shutter Release Button
(3) is pressed down.
When the Auto/Manual Switch (23) is set to 'M, the aperture closes down immediately to whatever f/number
has been selected on the Aperture Ring (14). Thereafter apertures are changed manually by moving the
Aperture Ring into any of its 'click-stop positions. Normally the lens would be used in Automatic mode, in
which case the lens opening required (f/2, f/2.8, f/4, etc.) is selected by turning Aperture Ring (14) until that
f/number (or a position mid-way between marked lens opening if so indicated by meter needle movement in the
viewfinder) aligns with the Distance/Aperture Index Mark (10). As soon as pressure is taken off the Shutter
Release Button, the aperture automatically returns to its wide-open position.4www.butkus.org
Choosing shutter speeds and lens openings
Under given conditions of lighting and film sensitivity there are various combinations of shutter speed and
aperture that will produce good results, However, you will often need to select a particular a shutter speed or
aperture to suit your subject so how do you choose? For example, the suggested shutter speed of 1/125th
second, while fast enough to stop most normal subject movement, (people walking etc.) would not be enough to
freeze the really fast action of subjects such as children at play, sports events or racing cars -- here, speed of
1/250th or 1/500th second would be best.
Again, if taking a landscape type
icture, a small aperture of say
f/1 1 or f/1 6 would be needed to
obtain maximum sharpness (see
Depth of Field). Summarizing
then; with moving subjects,
choice of shutter speed is of
most importance, to stop the
motion use the fastest speed
ossible that lighting conditions
will allow; where you need your
subject to be sharp over a long
range from foreground to
background, then choosing a
small lens aperture is more
important.
To Next Page
Loading...
