Optoma ZK420UST projector
4,200 ANSI lumen 4K UHD (3840×2160) laser projector with 500,000:1 contrast and an ultra short throw lens (0.25:1).
€3,629incl. VAT
In stock
Optoma ZK420UST vs ZK431ST: what is the difference?
ZK420UST has brightness: 4,200 ANSI lumens (vs 3,900 ANSI lumens). They also differ in contrast, throw ratio, inputs and outputs. The ZK420UST costs €1,815 more.
Optoma ZK431ST projector
3,900 ANSI lumen 4K UHD (3840×2160) laser projector with 300,000:1 contrast and a short throw lens (0.496:1).
€1,814incl. VAT
In stock
Specifications side by side
| Specification | ZK420UST | ZK431ST |
|---|---|---|
| Price incl. VAT | €3,629 | €1,814 |
| Technology | DLP | DLP |
| Light source | Laser | Laser |
| Native resolution | 4K UHD (3840×2160) | 4K UHD (3840×2160) |
| Brightness | 4,200 ANSI lumens | 3,900 ANSI lumens |
| Contrast | 500.000:1 | 300.000:1 |
| Throw ratio | 0,25:1 | 0,496:1 |
| Zoom | Fixed (no optical zoom) | Fixed (no optical zoom) |
| Inputs | 1 × HDMI 2.0, 1 × HDMI 2.0 (eARC), 1 × USB service / power, 1 × DC power | 1 × HDMI 2.0, 1 × HDMI 2.0 (eARC) |
| Outputs | 1 × 3.5 mm audio jack, 1 × 3D sync | 1 × 3.5 mm audio jack, 2 × USB-A power 1.5 A |
| Control | 1 × 4K HDBaseT, 1 × RJ45, 1 × RS232 | 1 × RS232, 1 × RJ45, 1 × 12 V trigger, 1 × 3D sync |
| Weight | 4.5 kg | 2.9 kg |
| Light source lifetime | 30,000 hours | 30,000 hours (Eco mode) |
| Throw distance | 0,61 – 0,89 m | 0,33 – 3,3 m |
| Noise level | 29–34 dB | 29 dB |
| Speaker | 1 × 15 W | 1 × 15 W |
| Dimensions (W × D × H) | 327 × 328 × 85 mm | 216 × 274 × 108.5 mm |
| 24/7 operation | Yes | Yes |
| 360° mounting | Yes | Yes |
| Keystone correction | – | horizontal ±15°, vertical ±15° |
| Input lag | – | from 8.6 ms |
| Max. power consumption | – | 178 W |
| Availability | In stock | In stock |
| Product code | ZK420UST · P/N E3P7NK1E111 | ZK431ST · P/N E3P7PN1E116 |
highlighted rows are the differences; green marks the higher value (or the lower price).
In short: which one should you choose?
ZK420UST
Choose ZK420UST if you need brightness: 4,200 ANSI lumens, contrast: 500.000:1, outputs: 1 × 3.5 mm audio jack, 1 × 3D sync.
See the ZK420UST →ZK431ST
Choose ZK431ST if you need contrast: 300.000:1, inputs: 1 × HDMI 2.0, 1 × HDMI 2.0 (eARC); brightness: 3,900 ANSI lumens is enough; you want to pay €1,815 less.
See the ZK431ST →Not sure which model suits you? Tell us how many users, what space or what you need to connect, and we'll recommend the right option for free. On request, we install and configure it.
Ask on WhatsAppFrequently asked questions: ZK420UST or ZK431ST
- What is the difference between the ZK420UST and the ZK431ST?
- ZK420UST has brightness: 4,200 ANSI lumens (vs 3,900 ANSI lumens). They also differ in contrast, throw ratio, inputs and outputs. The ZK420UST costs €1,815 more.
- Which should I choose: ZK420UST or ZK431ST?
- Choose ZK420UST if you need brightness: 4,200 ANSI lumens, contrast: 500.000:1, outputs: 1 × 3.5 mm audio jack, 1 × 3D sync. Choose ZK431ST if you need contrast: 300.000:1, inputs: 1 × HDMI 2.0, 1 × HDMI 2.0 (eARC); brightness: 3,900 ANSI lumens is enough; you want to pay €1,815 less.
- How much do the ZK420UST and ZK431ST cost?
- The ZK420UST costs €3,629 and the ZK431ST costs €1,814, including Romanian VAT and updated daily at the National Bank of Romania rate. Delivery is free in Bucharest; elsewhere in Romania it's 30 lei by courier.