Comparison
ZK810TST vs ZU820TST
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A side-by-side look at how the Optoma ZK810TST and Optoma ZU820TST compare on specs, accuracy, room requirements, and price. No hype — just the parts of the decision a buyer actually weighs.
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More comparisons with the ZK810TST and ZU820TST
Buy ZK810TST
Prices confirmed Nov 10, 2026 · we check every retailer daily
Buy ZU820TST
Prices confirmed Nov 10, 2026 · we check every retailer daily
When you buy through links on Northcourse, we may earn a commission at no additional cost to you. Read the full affiliate disclosure
Full specificationsEvery spec for both, line by line
Specifications
The numbers, lined up.
Image
| Spec | ZK810TST | ZU820TST |
|---|---|---|
| Resolution | 4K UHD (3840×2160) | WUXGA (1920×1200), 16:10 |
| Lumens | 8,500 (7,200 ANSI) | 8,100 (6,900 ANSI) to plan on; Optoma's US page and US datasheet say 8,200, its Australian page and 2023 datasheet 8,100 |
- ResolutionZK810TST4K UHD (3840×2160)ZU820TSTWUXGA (1920×1200), 16:10
- LumensZK810TST8,500 (7,200 ANSI)ZU820TST8,100 (6,900 ANSI) to plan on; Optoma's US page and US datasheet say 8,200, its Australian page and 2023 datasheet 8,100
Hardware
| Spec | ZK810TST | ZU820TST |
|---|---|---|
| Light Source | DuraCore MultiColor laser (30,000 hours) | DuraCore laser (30,000 hours) |
| Throw Ratio | 0.65–0.75 (1.15× motorized zoom) | 0.75–0.95 (1.26× motorized zoom) |
| Lens Shift | Motorized; vertical ±50%, horizontal ±18% (datasheet; the page says ±55% / ±25%) | Motorized; vertical ±50%, horizontal ±15% |
| Dimensions | 19.13 × 17.03 × 7.3 in (W × D × H, datasheet) | 19.13 × 15.53 × 7.3 in (W × D × H) |
- Light SourceZK810TSTDuraCore MultiColor laser (30,000 hours)ZU820TSTDuraCore laser (30,000 hours)
- Throw RatioZK810TST0.65–0.75 (1.15× motorized zoom)ZU820TST0.75–0.95 (1.26× motorized zoom)
- Lens ShiftZK810TSTMotorized; vertical ±50%, horizontal ±18% (datasheet; the page says ±55% / ±25%)ZU820TSTMotorized; vertical ±50%, horizontal ±15%
- DimensionsZK810TST19.13 × 17.03 × 7.3 in (W × D × H, datasheet)ZU820TST19.13 × 15.53 × 7.3 in (W × D × H)
Requirements
| Spec | ZK810TST | ZU820TST |
|---|---|---|
| Throw Distance | 100 in at about 4.7–5.4 ft, from the ratio | 100 in (16:10) at about 5.3–6.7 ft (Optoma's manual) |
- Throw DistanceZK810TST100 in at about 4.7–5.4 ft, from the ratioZU820TST100 in (16:10) at about 5.3–6.7 ft (Optoma's manual)
Performance
| Spec | ZK810TST | ZU820TST |
|---|---|---|
| Input Lag | 16.8 ms at 4K/60Hz and 4.5 ms at 1080p/240Hz with Gaming Mode on; up to 50.2 ms with it off (Optoma's manual) | — |
- Input LagZK810TST16.8 ms at 4K/60Hz and 4.5 ms at 1080p/240Hz with Gaming Mode on; up to 50.2 ms with it off (Optoma's manual)ZU820TST—
Room planner
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Persona fitWho each one is better for
Who each one is better for
Honest persona fit, side by side.
Better for ZK810TST
- Showroom
4K, a short throw, 7,200 ANSI lumens and motorized lens shift in one unit: the projector for a very large showroom screen in a lit room, at a price to match.
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