Comparison
AK900ST vs ZU820TST
When you buy through links on Northcourse, we may earn a commission at no additional cost to you. Read the full affiliate disclosure
A side-by-side look at how the BenQ AK900ST and Optoma ZU820TST compare on specs, accuracy, room requirements, and price. No hype — just the parts of the decision a buyer actually weighs.
Also worth a look
More comparisons with the AK900ST and ZU820TST
Buy AK900ST
Show all 2 retailersShow fewer retailers
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 | AK900ST | ZU820TST |
|---|---|---|
| Resolution | 4K UHD (3840×2160) | WUXGA (1920×1200), 16:10 |
| Lumens | 6,000 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 |
| Color | 97% Rec. 709; Golf, Bright Golf and HDR Golf picture modes | — |
- ResolutionAK900ST4K UHD (3840×2160)ZU820TSTWUXGA (1920×1200), 16:10
- LumensAK900ST6,000 ANSIZU820TST8,100 (6,900 ANSI) to plan on; Optoma's US page and US datasheet say 8,200, its Australian page and 2023 datasheet 8,100
- ColorAK900ST97% Rec. 709; Golf, Bright Golf and HDR Golf picture modesZU820TST—
Hardware
| Spec | AK900ST | ZU820TST |
|---|---|---|
| Light Source | Laser, IP5X sealed (20,000 hours; 30,000 Eco) | DuraCore laser (30,000 hours) |
| Throw Ratio | 0.81–0.89 (1.1× motorized zoom) | 0.75–0.95 (1.26× motorized zoom) |
| Lens Shift | V ±60% / H ±23% | Motorized; vertical ±50%, horizontal ±15% |
| Fan Noise | 34/29 dB (normal/eco, BenQ spec) | — |
| Weight | 10.2 kg (22.5 lb) | — |
| Dimensions | — | 19.13 × 15.53 × 7.3 in (W × D × H) |
- Light SourceAK900STLaser, IP5X sealed (20,000 hours; 30,000 Eco)ZU820TSTDuraCore laser (30,000 hours)
- Throw RatioAK900ST0.81–0.89 (1.1× motorized zoom)ZU820TST0.75–0.95 (1.26× motorized zoom)
- Lens ShiftAK900STV ±60% / H ±23%ZU820TSTMotorized; vertical ±50%, horizontal ±15%
- Fan NoiseAK900ST34/29 dB (normal/eco, BenQ spec)ZU820TST—
- WeightAK900ST10.2 kg (22.5 lb)ZU820TST—
- DimensionsAK900ST—ZU820TST19.13 × 15.53 × 7.3 in (W × D × H)
Performance
| Spec | AK900ST | ZU820TST |
|---|---|---|
| Input Lag | 18.1 ms at 4K/60Hz; 4.8 ms at 1080p/240Hz | — |
- Input LagAK900ST18.1 ms at 4K/60Hz; 4.8 ms at 1080p/240HzZU820TST—
Software
| Spec | AK900ST | ZU820TST |
|---|---|---|
| Golf Features | Golf Mode 2.0, Auto Screen Fit 2.0 (flat and curved screens; automatic under 13.1 ft from the screen, Smart Warping beyond), autofocus, Golf Scene Memory (5 profiles) | — |
- Golf FeaturesAK900STGolf Mode 2.0, Auto Screen Fit 2.0 (flat and curved screens; automatic under 13.1 ft from the screen, Smart Warping beyond), autofocus, Golf Scene Memory (5 profiles)ZU820TST—
Requirements
| Spec | AK900ST | ZU820TST |
|---|---|---|
| Throw Distance | — | 100 in (16:10) at about 5.3–6.7 ft (Optoma's manual) |
- Throw DistanceAK900ST—ZU820TST100 in (16:10) at about 5.3–6.7 ft (Optoma's manual)
Room planner
See each one in your sim room.
The planner draws each unit to scale with your room and your swing: where it mounts, the throw it needs, and whether your shadow crosses the light. Put in your room once, then switch units in the planner to compare.
Persona fitWho each one is better for
Who each one is better for
Honest persona fit, side by side.
Better for AK900ST
- Showroom
6,000 lumens with lens shift and BenQ's golf features, in the throw the LK936ST used. For a premium room with windows or a large screen, this is BenQ's current top answer.
- Performance Seeker
Bright enough for data review with the lights on, 18 ms of lag at 4K, and Auto Screen Fit to keep the image square on the screen without a calibration session.
Build your simulator in two minutes
Five questions. One tailored build with retailer links.
We ask about your budget, your room, and how you’ll use it. We return a complete build — launch monitor, mat, enclosure, projector, software, PC — with the reasoning behind every pick and the alternatives we considered.