Infrared Photography; Release Button - Praktica BX 20 Manual

Infrared photography

Infrared photography requires a slight correction to the focusing: match the distance determined in focusing
with the infrared index (see arrow) on the lens.
Locking the release button
Accidental shutter release and unnecessary use of power as a result of unintentional pressing of the shutter
release button when the camera is wound or not can be avoided by locking the release button.
To this end, the lock (20) below the shutter speed dial is fumed in the direction of the arrow. To unlock turn in
the opposite direction.
Self-timer
If a motor winder is attached to the camera and switched on, several frames can be exposed during the delay
period with fast shutter speeds. If this is not desired, the motor winder should be switched off.
To avoid incorrect metering in the automatic mode the eyepiece should be covered with the eyepiece coyer
supplied.
The limits of the depth of field for the selected
aperture can be read off from the depth-of-
field scale (15) on me lens. Example: distance
3 m, aperture 8 - depth of field ranges from
around 2 m to 5 m.

Release button

For ease of operation several functions have
been combined in the shutter release (22).
When the camera is wound, gentle depression
of the shutter release until pressure is felt
switches on the automatic system and the LEDs
for shutter speeds or flash readiness (with
special flash units). Further pressure will release
the shutter.
Advance the shutter, swing the self-timer
winding lever (4) in the direction of the arrow 1
as far as it will go, and release by pressing
starting button (3) as shown by arrow 2. The
delay period is approximately 10 s. Do not wind
the shutter while the delay mechanism is
running.