Optoma
Optoma UHZ36STe 4K UHD Short Throw Laser Projector
Similar brightness4,000 lm
UHD4,000 lm30-300"
£1,998.74inc. VAT
In stock
UK stockBenQ
BenQ LH850ST Full HD 4,000-Lumen Short Throw Laser Projector
£2,087.00inc. VAT
£1,739.17 ex. VAT
In stock, dispatched within 2 working days
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Bought in the UK, backed in the UKWhy it matters →
- In UK stock, ships from the UK
- UK manufacturer warranty
- UK-based engineers
- No import duty or customs charges
- GBP pricing, UK VAT invoices
Key specifications
Brightness4000 ANSI lumens
Light Source Life20,000 hours (Normal) / 38,000 hours (Eco)
Colour Depth30-bit (1.07 billion colours)
HDMI Inputs2x HDMI 2.0a (HDCP2.2)
NetworkLAN (RJ45)
USB Ports2x USB Type-A, 1x USB Mini-B
Control PortRS-232
Speaker10W
Description
The BenQ LH850ST is a 1080p (1920x1080) laser short-throw projector delivering 4000 ANSI lumens, purpose-built for simulation training, interactive entertainment and commercial exhibition spaces. A 0.499 throw ratio lets it fill screens larger than 100 inches from just over a metre, keeping people and objects clear of the beam path and reducing shadowing in small, multi-projector rooms.
Also in this range:5,500-Lumen 4,600-Lumen LH860ST LH830ST Full specifications Datasheet Compare alternatives
A dual colour-wheel system with an additional yellow segment produces a precise RGBY colour spectrum, paired with a dedicated Simulation Mode that boosts colour intensity and visual clarity, and 3,000,000:1 contrast for strong image depth. The laser light source is rated at 20,000 hours in normal mode and up to 38,000 hours in eco mode. Connectivity includes dual HDMI 2.0a inputs with HDCP2.2, LAN (RJ45), two USB Type-A ports, USB Mini-B and RS232, supporting both standalone and networked multi-unit installations.
With 2D keystone correction (+/-30 degrees) and BenQ's colour calibration tools for multi-projector scenarios, the LH850ST is suited to simulation training rigs and immersive display walls, and is covered by BenQ's standard 3-year warranty.
Key features
RGBY Dual Colour Wheel
A dual colour-wheel system with an added yellow segment and a dedicated Simulation Mode produce a precise, vivid colour spectrum tuned for immersive multi-projector content.
Compact Short-Throw Placement
A 0.499 throw ratio fills screens over 100 inches from just over a metre away, keeping the beam path clear of people and objects in tight, multi-projector rooms.
Laser Reliability
A laser light source rated at 20,000 hours (normal) and up to 38,000 hours (eco) reduces maintenance versus lamp-based alternatives, backed by 3,000,000:1 contrast.
Networked Multi-Unit Support
Dual HDMI 2.0a, LAN (RJ45), dual USB Type-A, USB Mini-B and RS232 support both local sources and coordinated control across multi-projector simulation installations.
Technical specifications
Choose a section to view its specifications.
Display (5)
- Brightness
- 4000 ANSI lumens
- Resolution
- 1080p (1920 x 1080)
- Contrast Ratio
- 3,000,000:1 (FOFO)
- Aspect Ratio
- 16:9
- HDR Support
- HDR10, HLG
Connectivity (6)
- HDMI Inputs
- 2x HDMI 2.0a (HDCP2.2)
- Network
- LAN (RJ45)
- USB Ports
- 2x USB Type-A, 1x USB Mini-B
- Control Port
- RS-232
- White Light Output
- 4,000 ANSI lumens
- Connectivity
- 2 x HDMI 2.0a (HDCP 2.2), LAN (RJ45), USB-A, USB Mini-B, RS-232, 3.5 mm audio out
Audio (2)
- Speaker
- 10W
- Audio
- 1 x 10W speaker
Power & Physical (5)
- Colour Depth
- 30-bit (1.07 billion colours)
- Dimensions (WxHxD)
- 320 x 130.6 x 255 mm
- Power Consumption
- 250W typical (110V)
- Dimensions (W x D x H)
- 320 x 255 x 130.6 mm
- Weight
- 5.1 kg
Certifications & Warranty (1)
- Warranty
- 3 years
General (7)
- Light Source Life
- 20,000 hours (Normal) / 38,000 hours (Eco)
- Projection Technology
- Single-chip DLP
- Light Source
- Laser, 20,000 hours normal / 38,000 hours eco
- Throw Ratio
- 0.499:1
- Zoom
- Fixed lens
- Keystone Correction
- 2D: vertical +/-30 degrees, horizontal +/-30 degrees
- Noise Level
- 35 dB normal / 32 dB eco
Throw distance guide
With its 0.499:1 throw ratio, here's how far the projector needs to sit from the screen for common 16:9 image sizes. Try our throw distance calculator for your exact room.
Try a size
100"
16:9 diagonal image
Image
2.21 m × 1.25 m
Lens position
1.1 m
Side view: drag the projector to try its available lens positions
Position fits
| Image size | Image dimensions | Lens distance |
|---|---|---|
| 60" | 1.33 m × 0.75 m | 0.7 m |
| 80" | 1.77 m × 1.00 m | 0.9 m |
| 100" | 2.21 m × 1.25 m | 1.1 m |
| 120" | 2.66 m × 1.49 m | 1.3 m |
| 150" | 3.32 m × 1.87 m | 1.7 m |
Planning from a real wall? Use the projector screen size calculator to upload a photo, preview the image to scale and find projectors that fit within your maximum available space. Replacing an existing projector? The projector replacement calculator checks whether this lens covers the ratio your current mount needs.
Distances are lens-to-screen, calculated from the manufacturer's stated throw ratio; allow for lens shift and mounting hardware. Always confirm against the manufacturer's installation guide before fixing mounts.
See it on your wall, to scale
Choose a picture size, then upload a wall photo, or scan the QR code and take it on your phone. We'll show the projected picture at its real size.
Picture size
100" 16:9 · 2.21 m × 1.25 m
On a computer, the QR code sends your phone photo straight back to this page.
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Complete your setup
Optional extras that fit this product. Tick anything you need and it joins the same basket — or add this product on its own from the buy box above.
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Choose a Screen
Video Conferencing
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Professional Installation
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Your Configuration
BenQ LH850ST Full HD 4,000-Lumen Short Throw Laser Projector × 1£2,087.00
Total£2,087.00
inc. VAT
1
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Delivery & returns
Estimated delivery 10 Oct - 14 Oct. UK mainland delivery only. Some large or made-to-order items carry longer lead times, shown on the product page.
Unused items in original packaging can be returned within 14 days of delivery — see the returns policy for how business and consumer returns differ. Faulty items are covered under manufacturer warranty and by your statutory rights.
Bought in the UK, backed in the UK
This item is in UK stock and ships to you from within the UK, so the order never crosses a customs border on its way to you.
The manufacturer warranty is honoured here in the UK. If something fails, you deal with us, not with an overseas seller in another time zone.
Our own UK-based engineers install, commission and support what we sell, and can attend site when a system needs hands on it.
Delivered within the UK mainland, so there is no import duty, customs charge or courier handling fee waiting for you on delivery.
Prices are in pounds sterling with proper UK VAT invoices, and purchase orders are accepted from approved education accounts: no currency conversion and no surprises at the door.
Payment & security
Pay securely by card. Education customers can apply for a 30-day purchase order account.
Schools, colleges, sixth forms, universities and multi-academy trusts can order on invoice, with no card payment required. Purchase orders and credit terms are for education customers only.
All transactions are processed over an encrypted, secure checkout.
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