Optoma ZH451ST Full HD Short Throw Laser Projector | 4200 Lumens
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Optoma ZH451ST Full HD Short Throw Laser Projector | 4200 Lumens
Eco-friendly high brightness short throw Full HD laser projector
The ZH451ST is one of Optoma's most compact and hassle-free Full HD 1080p DuraCore laser projectors to date. Designed for maintenance-free continuous operation, this 4200 ISO lumen projector delivers powerful image performance with flexible installation features and extensive connectivity options in a sleek, compact form factor, up to 34% smaller than previous Optoma models.¹
To support Optoma's commitment to sustainability, the ZH451ST cuts power consumption by up to 45% compared to Optoma's lamp-based projectors.² Energy-saving DuraCore laser technology ensures a long product lifespan of up to 30,000 hours without the need for additional lamps, requires minimal maintenance, and is mercury-free, further lowering its carbon footprint.
With Optoma Management Suite (OMSC)™ you can also remotely manage this projector and other compatible devices with ease. This powerful cloud-based solution offers effortless control, real-time monitoring, and scheduling, helping to reduce downtime, streamline operations, and cut operating costs.


Designed for the future
We are committed to reducing the overall environmental footprint of our products so we can do right by the planet.
Designing innovative products with sustainability in mind considers every phase of a product's lifecycle, from design, manufacturing, packaging, and logistics, to usage.

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Laser technology Optoma laser projectors use high-quality lasers to create the projected image. In many situations the perceived brightness from laser illumination projectors can be twice that of an equivalent lamp-based model. They also deliver increased efficiency to maintain consistent brightness, superior colour performance, instant on/off and an extraordinary life span of up to 30,000 hours. |
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DuraCore Industry leading lifetime is achieved using Optoma's DuraCore technology. Implementing advanced laser diode cooling techniques and an innovative dust resistant design. |
Short Throw
With a short throw lens, you can project an impressive 100" image from just over a metre away. This allows you to place the projector closer to the wall, reducing shadows so you can present with ease.
Full HD 1080p
1080p resolution gives you sharp and detailed images from HD content without downscaling or compression; perfect for watching Blu-ray movies, HD broadcasting and playing video games.

Specifications
| Display / Image | |
| Display Technology | DLP® |
| Resolution | 1080p Full HD (1920 x 1080) |
| ISO 21118 Brightness | 4,200 Lumens |
| Contrast Ratio | 300,000:1 |
| Contrast Ratio (Dynamic) | 2,000,000:1 |
| Native Aspect Ratio | 16:9 |
| Compatible Aspect Ratios | 4:3, 16:9, 16:10 |
| Keystone Correction (Horizontal) | 15° |
| Keystone Correction (Vertical) | 15° |
| Displayable Colours | 1,073.4 million |
| Horizontal Scan Rate | 15 ~ 135 kHz |
| Vertical Scan Rate | 24 ~ 120 Hz |
| Uniformity | 75% |
| Screen Size | 0.76 m – 7.62 m (30" – 300") diagonal |
| Light Source | |
| Light Source Type | Laser |
| Laser Life | 30,000 hours |
| Optical | |
| Throw Ratio | 0.496:1 |
| Projection Distance | 0.33 m – 3.3 m |
| Zoom Type | Fixed |
| Focal Length | 7.51 mm |
| Native Offset | 116% |
| Connectivity | |
| Inputs | 2 x HDMI 2.0, 1 x Audio 3.5mm, 1 x VGA |
| Outputs | 1 x Audio 3.5mm, 2 x USB-A power 1.5A |
| Control | 1 x RS232, 1 x RJ45, 1 x 12V trigger, 1 x 3D sync |
| General | |
| Noise Level (Min) | 29 dB |
| Noise Level (Max) | 31 dB |
| PC Compatibility | FHD, UXGA, SXGA, WXGA, HD, XGA, SVGA, VGA, Mac |
| 2D Compatibility | NTSC M/J 3.58MHz/4.43MHz, PAL B/D/G/H/I/M/N 4.43MHz, SECAM B/D/G/K/K1/L 4.25/4.4MHz, 480i/p, 576i/p, 720p (50/60Hz), 1080i (50/60Hz), 1080p (50/60Hz) |
| 3D Compatibility | DLP 3D; PC frame sequential 120Hz 3D, Blu-ray DVD 3D; Over-Under: 1080p24, 720p50/60 |
| 3D | Full 3D |
| Security | Security bar, Kensington Lock, Password protected interface |
| IP Rating | IP6X |
| OSD / Display Languages | 25 languages: Arabic, Czech, Danish, Dutch, English, Farsi, Finnish, French, German, Greek, Hungarian, Indonesian, Italian, Japanese, Norwegian, Polish, Portuguese, Romanian, Russian, Chinese (Simplified), Spanish, Swedish, Chinese (Traditional), Turkish, Vietnamese |
| 24/7 Operation | Yes |
| 360° Operation | Yes |
| Operating Conditions | 0°C – 40°C, Max. Humidity 80%, Max. Altitude 2,500 m |
| Speaker | 1 x 15W |
| Power | |
| Power Supply | External, 100V – 240V, 50-60Hz |
| Power Consumption (Standby) | <0.5W |
| Power Consumption (Min) | 118W |
| Power Consumption (Max) | 170W |
| Weight & Dimensions | |
| Dimensions (W x D x H) | 274 x 216 x 114 mm |
| Gross Weight | 4.3 kg |
| Net Weight | 2.9 kg |
| In the Box | AC power cord, Remote control, 2 x AAA batteries, Basic user manual |
Caring for your Speakers and Amplifiers
To Keep your equipment safe these are some best practices to note. Please be advised that this is only to reduce the risk of misuse and is not an exhaustive list.
Speakers
- Speaker terminals are marked red and black, ensure your amplifier to the speakers are wired on the same colours
- Ensure no loose speaker wire from the red touches a loose wire from the black as this will lead to a short circuit and damage either the speaker, the amplifier or both.
- Not all speakers are designed to play at max volume, kindly consider the pairing of your amplifier and speakers
- Speaker cabinets cannot be replaced please handle with care.
AV & Stereo Amplifiers
- If your amplifier has HDMI ports, ensure all devices are off before plugging in the HDMI cable
- Turn off the amplifier before swoping out or adding speaker cable
- Amplifiers generate heat, place them in a well ventilated space. if possible avoid having anything on top of the unit.
- adding a surge protector can assist with power dips which are likely to damage your devices. Isotek and Furman are industry standard.
- Dusty environments can sometimes lead to accumulation of dust in the electronic components that might affect heat regulation
Shipping & Returns
- Free shipping on orders over R500 within the country.
- Standard delivery within 2–5 business days. Delays will be communicated. This might vary slightly depending on your location.
- Return items in original condition for a full refund. (unopened state)
- Returns that are open/unboxed will be subject to a handling fee. Refunds will only be processed after testing the unit.


