Key Features 

• Versatile Standard Zoom Range
  Focal Length: 22.8-28.5mm (1.25x zoom)
• Aperture: f/2.46 (wide) to f/2.56 (tele)
• Balanced throw ratio for medium-distance projection in most professional environments
• Optical Performance
  High-quality glass elements with multi-layer coatings:
• Minimizes spherical/chromatic aberration
• Reduces light loss (<5%) for maintained brightness
• Manual zoom/focus rings for precise adjustment
• Professional Durability
  Metal housing with dust-resistant seals
• Thermal-stable materials prevent focus drift during extended use
• Rated for 24/7 operation in 0-40°C environments

Compatibility
Designed for BenQ's Pro Series installation projectors including:

LU9200/LU9235/LU9400 series