Comparison
UHZ35ST vs ZH451ST
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A side-by-side look at how the Optoma UHZ35ST and Optoma ZH451ST compare on specs, accuracy, room requirements, and price. No hype — just the parts of the decision a buyer actually weighs.
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Buy UHZ35ST
Prices confirmed Nov 10, 2026 · we check every retailer daily
Buy ZH451ST
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 | UHZ35ST | ZH451ST |
|---|---|---|
| Resolution | True 4K (3840×2160) | 1080p (1920×1080) |
| Lumens | 3,500 (standard not stated) | 4,200 (ISO 21118) |
| HDR | HDR10, HLG | — |
| Picture Mode | Golf Sim preset | — |
- ResolutionUHZ35STTrue 4K (3840×2160)ZH451ST1080p (1920×1080)
- LumensUHZ35ST3,500 (standard not stated)ZH451ST4,200 (ISO 21118)
- HDRUHZ35STHDR10, HLGZH451ST—
- Picture ModeUHZ35STGolf Sim presetZH451ST—
Hardware
| Spec | UHZ35ST | ZH451ST |
|---|---|---|
| Light Source | Laser (30,000 hours) | Laser (30,000 hours) |
| Throw Ratio | 0.496:1 (fixed) | 0.496:1 (fixed) |
| Fan Noise | 28–35 dB (Optoma spec) | — |
| Offset | — | 116% (±5%); no lens shift |
| Dimensions | — | 10.79 × 8.5 × 4.49 in (W × D × H) |
- Light SourceUHZ35STLaser (30,000 hours)ZH451STLaser (30,000 hours)
- Throw RatioUHZ35ST0.496:1 (fixed)ZH451ST0.496:1 (fixed)
- Fan NoiseUHZ35ST28–35 dB (Optoma spec)ZH451ST—
- OffsetUHZ35ST—ZH451ST116% (±5%); no lens shift
- DimensionsUHZ35ST—ZH451ST10.79 × 8.5 × 4.49 in (W × D × H)
Performance
| Spec | UHZ35ST | ZH451ST |
|---|---|---|
| Input Lag | 17 ms at 4K/60; 4.4 ms at 1080p/240Hz (Optoma's spec table says 16 ms at 4K/60, its feature list and datasheet 17 ms; the higher is used) | — |
- Input LagUHZ35ST17 ms at 4K/60; 4.4 ms at 1080p/240Hz (Optoma's spec table says 16 ms at 4K/60, its feature list and datasheet 17 ms; the higher is used)ZH451ST—
Requirements
| Spec | UHZ35ST | ZH451ST |
|---|---|---|
| Throw Distance | — | 100 in at about 3.6 ft (Optoma's manual) |
- Throw DistanceUHZ35ST—ZH451ST100 in at about 3.6 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 UHZ35ST
- Performance Seeker
Low input lag (about 17 ms at 4K/60, level with the TK710STi) and a 30,000-hour laser. At 3,500 lumens it is dimmer than the GT3900UHD and ZK431ST-B, which both cost less.
- Family Setup
4.4 ms at 1080p/240Hz for fast games, 4K for movies, and a Golf Sim preset. The GT3900UHD offers the same low 240Hz lag (4.3 ms) and a golf mode for $700 less.
- Space-Constrained
0.496 fixed throw — a 100-inch image from about 3.6 ft — fits tight rooms; same throw geometry as the GT2400HDR and AH500ST but in 4K.
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