BenQ LS2ST3 - 115mm f/2.5 Wide-Angle Fixed Lens

Whether you’re outfitting a compact classroom, a modern conference room, or a home cinema, the BenQ LS2ST3 115mm f/2.5 wide-angle fixed lens is engineered to optimize projector installation and image quality across a wide range of environments. This lens sits within BenQ’s versatile lineup of optical lenses, designed to deliver sharp focus, bright images, and reliable performance in challenging spaces. With seven throw options spanning from short-throw to long-throw, the LS2ST3 uses glass optics and a bright fixed aperture to maximize image clarity and brightness. Made in Japan to tight tolerances, it embodies precision craftsmanship that installers can trust and users can enjoy, ensuring consistent image geometry and dependable performance from installation to viewing.

• Seven throw lens options for versatile installations: BenQ’s projection lens lineup includes seven distinct optical configurations that cover short-throw to long-throw needs. The LS2ST3 is the 115mm focal-length wide-angle fixed lens within this family, crafted to provide a balanced solution for rooms with limited space or unconventional layouts. This fixed focal length reduces complexity during installation, while the wide-angle design enables larger image sizes from closer distances, helping you achieve the desired screen impact without compromising edge clarity or brightness. By choosing LS2ST3, installers can optimize throw distance for a variety of room sizes, ensuring a consistent viewing experience across spaces without repeatedly swapping lenses.
• Premium glass optics for sharp, bright images: The LS2ST3 uses high-quality glass elements to maximize focus, minimize aberrations, and preserve edge-to-edge sharpness. This optical design reduces distortion and color fringing, delivering precise text reproduction for presentations and crisp detail in graphics and video. The fixed 115mm focal length works in concert with the f/2.5 aperture to balance image brightness with depth of field, producing vibrant colors and strong contrast cast across the entire screen. In practice, this means clearer slides, more legible charts, and richer image rendering whether you’re in a dim room or one with ambient light leakage.
• Bright images with a wide aperture for versatile lighting: The f/2.5 maximum aperture helps gather more light than slower fixed lenses, yielding brighter projections in average room lighting. This advantage is especially noticeable in classrooms and meeting rooms where lights may be dimmed for comfortable viewing or where ambient daylight competes with the projected image. The increased brightness supports higher perceived contrast and more distinct color saturation, which translates into a more engaging viewing experience for audiences and a more reliable display of detailed content, such as fine text and fine-grained graphics.
• Japan-made quality and reliable construction: The LS2ST3 embodies BenQ’s commitment to meticulous manufacturing standards, with the lens assembly produced in Japan to ensure precise tolerances and robust durability. This emphasis on quality translates to consistent optical performance over time, reduced risk of misalignment, and a durable design capable of withstanding the rigors of regular installation, maintenance, and repositioning. A Japan-made build also underpins dependable long-term operation in busy environments like classrooms and corporate spaces, where equipment is used daily and must perform consistently across seasons and usage patterns.
• Easy installation and seamless integration in the BenQ ecosystem: The LS2ST3 is designed to integrate smoothly with BenQ projectors that support the LS-series lens mount. Its fixed focal length simplifies calibration by reducing variables associated with zoom lenses, enabling quicker setup and faster deployment in spaces that demand precise framing and alignment. The wide-angle design helps installers maximize image size while maintaining a comfortable viewing distance, which is particularly useful for small to medium rooms, auditoriums with fixed seating, or venues where room geometry restricts projector placement. The lens’s mechanical interface is built for secure mounting and reliable performance, contributing to a streamlined install workflow and fewer on-site adjustments over time.

Technical Details of BenQ LS2ST3

• Specifications unavailable in the current listing. Please consult official BenQ documentation or the supplier’s datasheet for full technical data, including exact compatibility, coatings, and mechanical dimensions.

How to Install BenQ LS2ST3

Install the LS2ST3 with a compatible BenQ projector by following these practical steps to ensure accurate image geometry, optimal brightness, and reliable operation:

• Power off the projector and unplug it from power. Safety first: allow any internal capacitors to discharge before handling lens assemblies.
• If your model uses a replaceable lens, carefully detach the existing lens according to the projector’s user manual. Some models may require loosening a locking screw or releasing a latch before the lens can be removed.
• Align the LS2ST3 with the projector’s lens mount. Confirm that the locking tabs or alignment guides match the projector’s interface, then gently insert the lens. Rotate or slide the lens as required by the mount design until it seats securely and sits flush against the body of the projector.
• Secure the lens using the projector’s locking mechanism. Tighten any locking screws or fasteners as specified by the manufacturer, ensuring there is no wobble or play in the lens.
• Power on the projector and perform a basic focus test. Since this is a fixed focal-length lens, manual focus may be required to obtain a sharp image across the screen. Use the projector’s built-in focus control to achieve edge-to-edge sharpness.
• Position the projector within the room to reach the intended screen size and throw distance. The 115mm focal length with its wide-angle design is ideal for closer placement while still filling the screen; adjust the projector height and tilt as needed to optimize keystone and image centering.
• Use test patterns and alignment tools to verify image geometry, color accuracy, and brightness uniformity. If necessary, fine-tune throw distance within the recommended range for your room to minimize distortion and ensure consistent brightness from edge to edge, especially in the corners.
• Save your preferred lens configuration as a memory profile if your projector supports it. This makes it easy to recall the correct settings for future installations in the same room or for other spaces with similar dimensions.

Frequently Asked Questions

• Q: What is the focal length and aperture of the BenQ LS2ST3 lens? A: The LS2ST3 is a fixed 115mm focal-length lens with an f/2.5 aperture, designed to deliver bright, sharp wide-angle projections.
• Q: Is LS2ST3 compatible with all BenQ projectors? A: LS2ST3 is designed for use with compatible BenQ projection models that support the LS-series lens mount; always verify compatibility with your specific projector model and consult the manufacturer’s lens compatibility charts.
• Q: Does the lens improve brightness in challenging rooms? A: Yes. The large f/2.5 aperture increases light gathering, which enhances perceived brightness and contrast in rooms with ambient light, improving legibility of text and clarity of colors.
• Q: What about installation and maintenance? A: The LS2ST3 is built for reliability and quick installation, with a durable Japan-made construction. Maintenance is minimal beyond standard cleaning of optics and ensuring a clean lens surface.
• Q: Where is the LS2ST3 manufactured? A: The lens is manufactured in Japan, reflecting BenQ’s commitment to high-quality optics and precise manufacturing standards.