Overhead Projector, Deluxe, ABS Body (Big)

Quick Answer: The Overhead Projector, Deluxe, ABS Body (Big) is the larger-bodied deluxe overhead projector in this range, with a moulded ABS housing, projecting transparencies from its glass stage onto a screen. A large overhead projector of this kind is generally chosen for lecture rooms and halls, where the image must be bigger and visible from further back.

Getting a Large, Square Image

The listing describes the body as big but does not say which dimensions are larger. In overhead projectors, a larger housing usually accommodates a bigger stage, a more powerful lamp and cooling, or a longer arm, so the stage size and lamp rating of this model are worth checking before ordering. What a larger room demands is a bigger, brighter image, and image size on an overhead projector is set mainly by distance: the further the projector is from the screen, the larger the picture, and the dimmer it becomes.

In a hall, the screen is often high and the projector low, so the beam strikes the screen at an upward angle and the image widens towards the top. This keystone distortion is corrected by tilting the top of the screen forward, by adjusting the head angle and projector position, or by raising the projector on a taller trolley. Once the image is square, final focus is made with the focusing knob.

If the projector cannot be moved in a fixed layout, the vari-focal version of this model changes image size from one position. For standard classrooms, the deluxe ABS model in the regular body is adequate.

Applications

• Lecture rooms and seminar halls where students sit far from the screen.
• School halls for assemblies and parents’ meetings that use transparencies.
• Teacher-training colleges demonstrating transparency teaching to large groups.
• Science lectures projecting demonstrations on the stage to a tiered audience.

Setting Up in a Large Room

• Use a sturdy trolley at a height that gives a square image, and lock its wheels during use.
• Tape the power lead to the floor along its route where people walk behind the projector.
• Let the lamp cool before moving the projector between rooms.
• Never write directly on the stage glass; write on film laid over it.

Specifications

Why Choose LabEquip

Colleges, training institutes and schools with lecture rooms order the big deluxe model when a standard projector gives too small an image. LabEquip lists it in the General Lab Products range; include room depth and screen width in your message on the contact page.

Frequently Asked Questions

How do I make the projected image bigger?

Move the projector further from the screen, then refocus with the focusing knob. The image grows with distance but also becomes dimmer, so darken the room if necessary.

What is keystone distortion and how is it fixed?

When the projector points up at a high screen, the image is wider at the top than at the bottom. Tilt the top of the screen towards the projector, or raise the projector so the beam meets the screen more squarely.

What does Big mean in this model name?

It refers to a larger ABS body than the standard deluxe model. Which features the larger body accommodates, such as stage size or lamp, is not stated, so request those details before ordering.

Is this projector suitable for a normal classroom?

It can be used there, but a larger body takes more desk space and its advantages show mostly in bigger rooms. For a standard classroom the regular deluxe ABS model is usually sufficient.

Why is the image dim at the back of the hall?

Brightness falls as the image is enlarged, and ambient light washes it out. Reduce the image size slightly, close blinds and switch off lights near the screen.

Can I write directly on the stage glass?

No. Pens scratch and stain the glass. Lay a transparency or acetate roll on the stage and write on that.

Last Updated: September 2026