Stage Projector
BP 4 CT
Pani Projection and Lighting Vertriebs GmbH
16
8) Objective Lenses
8.1) Front Condenser Lens
In the BP 4 CT, there are 4 different front condenser lenses to choose from,
depending on the focal length objective lens required. These are as follows:
PC Diameter 230 mm, multicoated
for Objective Lens f= 11; 13,5; 18; 22 and 27 cm,
Order Code: 12440
PC Diameter 230 mm, multicoated
for Objective Lens f= 33 and 40 cm,
Order Code: 12441
PC Diameter 230 mm, multicoated
for Objective Lens f= 50 and 60 cm
Order Code: 12442
PC Diameter 230 mm, multicoated
for Objective Lens f= 80 cm and 125 cm
Order Code: 12443
8.2) Projection Objective Lenses
Optional projection objective lenses (focal lengths from f=11 to 125cm) and one
ZOOM projections objective lens 25 – 60 cm are mounted on the four support bolts
on the front of the projector. Each lens is fixed in place by four wing nuts. The focal
length (f=) depends upon the projection distance and desired picture size. This is
illustrated further with the aid of the projection diagram. Focus is achieved by sliding
the objective lens forward or back along the optical axis. The focus position is fixed
in place by two milled nuts located on either side of each objective lens.
8.3) Effect- and Varioobjective Lenses
To enhance the system of projection objective lenses, effects and vario-objective
lenses are available. Effects Lenses (focal lengths of f=80/100 mm, 150 mm, 180
mm, 250mm and 310 mm) provide a strong light output with good color correction,
and may be used where an increase in depth or specific distortions are desired.
With the aid of the vario-objective lenses [focal lengths of f=20-40 cm (motorized)
and f=30-60 cm manual it is possible to enlarge or reduce image size. With the the
f=20 – 40 cm / motorized it is possible to change the image size at different speeds.
IMPORTANT NOTES
WHEN USING WIDE ANGLE LENSES:
The projector must
never
be operated
without
a slide, with dimming shutters closed
for longer than one minute!
GENERAL SAFETY TIP:
NEVER USE THE PROJECTOR WITHOUT ANY OBJECTIVE LENS!!!
