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Important features of overhead projectors

Keystone correction

A special optical system compensates for a trapezium-shaped distortion up to a certain projection angle in upward projection.

Picture height adjustment

Precise adjustment of the picture height via rotating knob.

LED for lamp failure

Reminds you to exchange the second lamp when out of order.

Lamp life indicator (for metal halide lamps)

Reminds you that a lamp life of only another 50 hours is left.

Lumen

Light output of the projector. The higher the lumen figure, the larger the picture size can be. For a daylight projection you need about 1,800 lumen for a picture size of 1.5 x 1.5 m, and for a picture size of 2.5 x 2.5 m you need about 5,000 lumen.

Metal halide lamp

For a white neutral light. High light output for larger picture sizes or sunlit lecture rooms. Lamp life approx. 1,000 hours.

Projection lamps

Low-priced halogen lamps are normally sufficient for lectures in rooms with up to 30 people. Metal halide lamps are recommended for a larger audience, or if the reproduction of true colours is of special importance. The higher costs for this lamp type are compensated by the much higher lamp life. Ohps with metal halide lamps bring more contrast to the image and, due to the spot-like light source, an even better picture sharpness.

Foldable projection arm

For easy transport and storage.

Roll attachment

For the use of transparency rolls The pair of cases can be attached to many ohps.

Focal compensation

Eliminates the lack of sharpness in the upper and lower part of the picture in upward projection. A further correction is possible by tilting the screen.

Economy switch

Reduces the brightness by approx. 20 %, but prolongs the lamp life about four times.

Lockable projector body

A safety lock prevents unauthorized persons from opening the top of the projector body and tampering with the technical components.