Optoma BX-CTA28 Motorized Ultra Short Throw Lens

Ideal Use Cases

The Optoma BX-CTA28 is a motorized ultra short throw zoom lens designed for immersive installations where the projector must remain very close to the screen. It is intended specifically for the Optoma ZK1320 and ZK1120 4K UHD+ projectors. This combination makes the lens suitable for projects that require a large image while offering only a short projector-to-screen distance.

Its supported image-size range extends from 80 inches to 500 inches. That broad range allows the BX-CTA28 to serve installations ranging from focused presentation environments to expansive visual displays. The ultra short throw design is especially relevant when conventional projector placement would consume too much room or put the projector farther into the occupied space.

Why Choose This Model

The defining benefit of the BX-CTA28 is its ability to support large-format projection from a very short distance. For compatible Optoma systems, this can simplify the placement of the projector relative to the screen and help accommodate locations where available throw distance is the primary constraint.

The lens also combines ultra short throw operation with zoom capability and a motorized design. These characteristics distinguish it from a basic fixed lens while providing an optical solution developed for the ZK1320 and ZK1120 projector platforms. Buyers should select this model when that stated compatibility, the short installation distance, and the 80-to-500-inch image range align with the project requirements.

Installation and Integration

Integration should begin by confirming that the projector is an Optoma ZK1320 or ZK1120 4K UHD+ model. The supplied product data identifies these as the compatible projectors; compatibility with other projector models is not specified. The planned screen or image area should also fall within the stated 80-inch to 500-inch size range.

Because this is an ultra short throw lens, the installation can position the projector much closer to the screen than a conventional projection arrangement. This is useful when room depth is limited or when an immersive display calls for a compact relationship between the projector and image surface. Exact throw ratio, lens-shift range, mounting requirements, and physical dimensions are not provided, so those values should be confirmed separately before finalizing placement or structural details.

Performance Highlights

• Motorized ultra short throw lens design.
• Zoom-lens configuration for compatible Optoma projectors.
• Designed for the Optoma ZK1320 and ZK1120 4K UHD+ projectors.
• Supports projected image sizes from 80 inches up to 500 inches.
• Intended for immersive installations requiring a very short projector-to-screen distance.

The BX-CTA28 focuses on installation flexibility at short range rather than adding a separate projection system. Resolution, brightness, contrast, light source, and image-processing performance are properties of the compatible projector and are not independently specified for this lens. The available data likewise does not state exact optical ratios, zoom range, or focus details.

What Makes It Different

Many projection lenses depend on substantial room depth to create a large image. The BX-CTA28 is differentiated by addressing the opposite requirement: producing images as large as 500 inches while supporting an installation with very little distance between the projector and screen. This makes its role highly specific and easy to evaluate against a proposed layout.

Its compatibility is also clearly defined. Rather than being presented as a universal accessory, the BX-CTA28 is identified for two Optoma 4K UHD+ projectors: the ZK1320 and ZK1120. That focused pairing provides a clear starting point for system planning and purchasing decisions.

Final Assessment

The Optoma BX-CTA28 is a purpose-built lens for ZK1320 and ZK1120 installations that need ultra short throw projection, motorized operation, zoom capability, and an image size between 80 and 500 inches. Its strongest fit is an immersive or large-format project where projector-to-screen distance is limited. Before purchase, verify the projector model and required image size, and obtain any project-specific optical or mechanical measurements not included in the available product data.