Eiki 3990 BP Overhead Projector 4000 ANSI Lumens 12-14" VariFocal Triplet Lens

Eiki 3990 BP Overhead Projector 4000 ANSI Lumens 12-14" VariFocal Triplet Lens

The Eiki 3990 BP is a high-output overhead projector from Eiki's 3900 series, producing 4,000 ANSI lumens — bright enough to project clearly in a normally lit room without having to dim the lights. It features a 12–14" VariFocal Triplet Lens for flexible focus and image sizing, and a folding head design for compact storage and transport. The arm and post are made from die-cast aluminum, and the body uses a steel frame construction. This unit powers on and the lamp lights up.

Specifications & What's Included

• Model: Eiki 3990 BP
• Series: Eiki 3900 Series
• Brightness: 4,000 ANSI Lumens
• Lens: 12–14" VariFocal Triplet Lens
• Head: Folding design for storage and transport
• Arm and Post: Die-cast aluminum construction
• Body: Steel frame
• Power: 120V, 60Hz, 150W
• Inlet: Standard 3-prong AC receptacle (rear panel)
• Compatible with LCD panels for computer-based presentations
• Projector only — no carrying case, spare lamp, or projection screen included

Applications

Overhead projectors like the Eiki 3990 BP are used to display transparencies (acetate sheets) or LCD panels onto a wall or screen in classrooms, conference rooms, training facilities, and lecture halls. The 3900 series was aimed at professional and educational environments where a brighter-than-average output was needed — 4,000 ANSI lumens is on the high end for an overhead projector and was specifically suited for use with LCD panel overlays, which absorb a significant amount of light and require a powerful lamp underneath to produce a usable image on the screen. Eiki is a Japanese manufacturer with a long history in optical and projection equipment; their 3900 series projectors were widely used in corporate training and higher-education settings through the 1990s and into the early 2000s, before LCD and DLP projectors became the dominant format. These units remain in use today wherever transparencies are still produced, and are also sought for use with vintage LCD panels in retro computing and AV setups.