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
Optoma ZK431ST vs ZK521ST: what is the difference?
ZK521ST has brightness: 5,000 ANSI lumens (vs 3,900 ANSI lumens). They also differ in contrast, throw ratio, inputs and outputs. The ZK521ST costs €484 more.
Optoma ZK521ST projector
5,000 ANSI lumen 4K UHD (3840×2160) laser projector with 3,000,000:1 contrast and a short throw lens (0.79:1).
€2,298incl. VAT
In stock
Specifications side by side
| Specification | ZK431ST | ZK521ST |
|---|---|---|
| Price incl. VAT | €1,814 | €2,298 |
| Technology | DLP | DLP |
| Light source | Laser | Laser |
| Native resolution | 4K UHD (3840×2160) | 4K UHD (3840×2160) |
| Brightness | 3,900 ANSI lumens | 5,000 ANSI lumens |
| Contrast | 300.000:1 | 3.000.000:1 |
| Throw ratio | 0,496:1 | 0,79:1 |
| Zoom | Fixed (no optical zoom) | Fixed (no optical zoom) |
| Inputs | 1 × HDMI 2.0, 1 × HDMI 2.0 (eARC) | 2 × HDMI 2.0 |
| Outputs | 1 × 3.5 mm audio jack, 2 × USB-A power 1.5 A | 1 × 3.5 mm audio jack, 1 × USB-A power 1.5 A |
| Control | 1 × RS232, 1 × RJ45, 1 × 12 V trigger, 1 × 3D sync | 1 × USB-A for wireless dongle, 1 × RJ45, 1 × 12 V trigger, 1 × RS232, 1 × 3D sync |
| Weight | 2.9 kg | 3 kg |
| Keystone correction | horizontal ±15°, vertical ±15° | horizontal ±15°; vertical ±15° |
| Light source lifetime | 30,000 hours (Eco mode) | 30,000 hours (Eco mode) |
| Throw distance | 0,33 – 3,3 m | 0,89 – 2,93 m |
| Noise level | 29 dB | 29 dB |
| Speaker | 1 × 15 W | 1 × 15 W |
| Input lag | from 8.6 ms | from 8.6 ms |
| Max. power consumption | 178 W | 193 W |
| Dimensions (W × D × H) | 216 × 274 × 108.5 mm | 216 × 274 × 114 mm |
| 24/7 operation | Yes | Yes |
| 360° mounting | Yes | Yes |
| Lens shift | – | vertical 104%~125% |
| Availability | In stock | In stock |
| Product code | ZK431ST · P/N E3P7PN1E116 | ZK521ST · P/N E3P7PV1E112 |
highlighted rows are the differences; green marks the higher value (or the lower price).
In short: which one should you choose?
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 €484 less.
See the ZK431ST →ZK521ST
Choose ZK521ST if you need brightness: 5,000 ANSI lumens, contrast: 3.000.000:1, inputs: 2 × HDMI 2.0.
See the ZK521ST →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: ZK431ST or ZK521ST
- What is the difference between the ZK431ST and the ZK521ST?
- ZK521ST has brightness: 5,000 ANSI lumens (vs 3,900 ANSI lumens). They also differ in contrast, throw ratio, inputs and outputs. The ZK521ST costs €484 more.
- Which should I choose: ZK431ST or ZK521ST?
- 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 €484 less. Choose ZK521ST if you need brightness: 5,000 ANSI lumens, contrast: 3.000.000:1, inputs: 2 × HDMI 2.0.
- How much do the ZK431ST and ZK521ST cost?
- The ZK431ST costs €1,814 and the ZK521ST costs €2,298, 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.