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Description
Optoma Compact 4K UHD Short Throw Laser Business & Education Projector - ZK521ST
The Optoma ZK521ST short throw projector delivers 5,000 lumens of brilliant True 4K UHD sharp visuals in a compact short-throw design, enabling large, shadow-free projections even in limited spaces. Engineered for 24/7 reliability, it offers a low-maintenance, energy-efficient laser solution with centralized IT management and smart control for corporate, education, or commercial uses.
This projector delivers up to 8.3 million pixels in 4K UHD (3,840 × 2,160) resolution using advanced DLP technology, producing exceptionally sharp images where even small text and detailed graphs remain clear and easy to read. With ±15° keystone correction, and support for 360-degree or portrait mode projection, this projector offers flexible installation in any space.
Aligned with Optoma’s Green Promise, this projector features an energy-efficient, mercury-free DuraCore laser light source. Built with over 50% recycled metal and PCR materials and packaged in 100% recyclable packaging, it is designed to reduce material waste and power consumption in support of sustainability.
- Crisp 4K from wall to wall: True 4K UHD (3840×2160) makes text, data, and imagery sharp and readable across screen sizes up to 300"
- Project big from tight spaces: 0.79:1 short throw lens fills the screen from just 5.8 feet away
- Sustainable design: 50% recycled metal and PCR materials
- Optoma Management Suite (OMS): Enables centralized IT monitoring and control across multiple networked devices
- Optoma Smart Control App: Intelligent screen alignment and remote control directly from your mobile device
Specifications
| Detailed Specifications | |
| Resolution: | 4K (4096x2160) |
| Display Device: | DLP |
| Brightness: | 5,000 lumens |
| Contrast Ratio: | 300000:1 |
| Video Signals: | NTSC, PAL, SECAM; Computer signals up to 4K UHD (3840 x 2160) |
| Aspect Ratio: | 16:9 |
| Number of Colors: | Full Color |
| Lamp: | Laser |
| Typical Lamp Life: | 30,000 hours (Eco mode) |
| Lens: | Fixed, 0.46” Focal Length |
| Throw Ratio: | 0.79 |
| Image Size: | 30” - 300” |
| Throw Distance: | 2.9’ - 9.6' |
| Keystone Correction: | Vertical & Horizontal ±15° |
| Projection Methods: | 360° Operation, Portrait |
| Inputs: | HDMI x 2 3.5mm Stereo Audio x 1 USB Type A x 2 RJ45 x 1 RS232 x 1 3D Sync x 1 12-Volt Trigger x 1 |
| Outputs: | 3.5mm Mini Jack Audio x 1 |
| Speaker: | 1 x 15W |
| Audible Noise: | 29 dB |
| Weight: | 9.4 lbs. |
| Dimensions: | (WxLxH) 10.8” x 8.5” x 4.3” |
| Accessories: | AC power cord, remote control, basic user manual |
| Remote Control: | Remote Control Included |
| Mfg Warranty: | N/A |
| Product Data Sheet: | |









