Head-to-head
Optoma UHD38 vs ViewSonic PX748-4K
Side-by-side comparison of the Optoma UHD38 and ViewSonic PX748-4K: throw ratio, brightness, resolution, input lag and price — plus which one to buy.
Quick verdict
The Optoma UHD38 and ViewSonic PX748-4K are both standard-throw projectors in a similar price range. Both put out 4,000 lumens. The ViewSonic PX748-4K can sit closer to the screen (throw ratio from 1.13 vs 1.50). The ViewSonic PX748-4K costs less — about $1,099 vs $1,199. For gaming, the ViewSonic PX748-4K has the lower input lag at 4.2 ms.
| Spec | Optoma UHD38 | ViewSonic PX748-4K |
|---|---|---|
| Throw ratio | 1.5–1.66 | 1.13–1.47 |
| Brightness | 4,000 lumens | 4,000 lumens |
| Resolution | 4K UHD | 4K UHD |
| HDR | Yes | Yes |
| Light source | lamp | lamp |
| Input lag | 16.7 ms | 4.2 ms |
| Price | ~$1,199 | ~$1,099 |
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Throw distance: Optoma UHD38 vs ViewSonic PX748-4K
How far each projector must sit from the screen for the same image size.
| Screen | Optoma UHD38 | ViewSonic PX748-4K |
|---|---|---|
| 80″ | 8.7–9.6 ft | 6.6–8.5 ft |
| 100″ | 10.9–12.1 ft | 8.2–10.7 ft |
| 120″ | 13.1–14.5 ft | 9.8–12.8 ft |
| 150″ | 16.3–18.1 ft | 12.3–16.0 ft |
Which should you buy?
- • Choose the ViewSonic PX748-4K for gaming — lower input lag means more responsive play.
- • Choose the ViewSonic PX748-4K if you want to spend less for similar core performance.
Frequently asked questions
The ViewSonic PX748-4K has the shorter throw, so it can be placed closer for the same image size.
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