ViewSonic PX749-4K: Specs, Throw Distance & Alternatives
A 4K UHD DLP lamp projector rated by ViewSonic at 4,000 ANSI lumens, with an Ultra-Fast Input mode rated at 4.2 ms at 1080p/240. ViewSonic publishes no lag figure at 60 Hz. It has no smart TV system, no built-in wireless and no lens shift.
Is the ViewSonic PX749-4K right for you?
Good for
- High-refresh PC gaming at 1080p/240 (rated 4.2 ms)
- HDR and HLG content
- Rooms with some light: 4,000 ANSI lumens rated
- Placement help: 1.3x optical zoom, ±40° keystone and four-corner correction
What to plan for
- No lag figure is published at 4K/60 or 1080p/60
- The 4.2 ms mode must be switched on in Advanced Settings and runs at 1080p only
- No smart TV system or built-in wireless; ViewSonic sells an optional WPG-370 wireless gateway separately
- No lens shift and a fixed offset, so the mount or table height has to be right
- Lamp rated for 4,000 hours in Normal mode (20,000 in SuperEco)
Based on manufacturer specifications and published reviews (sources below). We don't do hands-on testing.
ViewSonic PX749-4K specs
| Resolution | 4K UHD (3840 × 2160, 0.47-inch DLP) |
|---|---|
| Brightness | 4,000 ANSI lumens (ViewSonic rating) |
| Display technology | DLP |
| Light source | Lamp (240 W) |
| Lamp life (Normal mode) | 4,000 hours |
| Contrast ratio | 12,000:1 (ViewSonic rating, SuperEco mode) |
| Throw ratio | 1.13-1.47:1 |
| Lens shift | None (fixed 120% ±6% vertical offset) |
| Max refresh rate | 240 Hz |
| HDMI ports | 2 (HDMI 2.0) |
| Speakers | 10 W |
| Weight | 6.6 lb |
How far from the screen?
Lens-to-screen distance for a 16:9 image, calculated from its 1.13-1.47:1 throw ratio. The zoom lets you place it anywhere in the range.
| Screen | Closest | Farthest |
|---|---|---|
| 80″ | 6' 7" | 8' 6" |
| 100″ | 8' 2" | 10' 8" |
| 120″ | 9' 10" | 12' 10" |
| 150″ | 12' 4" | 16' 0" |
ViewSonic PX749-4K input lag by mode
| Signal | Input lag |
|---|---|
| 1080p / 240 Hz (Ultra-Fast Input) | 4.2 ms |
Source: ViewSonic’s published rating; we found no independent measurement. Its fastest figure (4.2 ms at 1080p / 240 Hz (Ultra-Fast Input)) is quicker than 77 of the 96 projectors with a lag figure in our input lag database, which lists each model's fastest mode.
ViewSonic PX749-4K alternatives at a similar price
In-stock 4K projectors priced closest to it on Amazon today.
| Model | Price today | Amazon rating | Compare |
|---|---|---|---|
| ViewSonic PX749-4K (this one) | $1,169 | 3.8★ | — |
| JMGO N1S Ultra 4K Triple Laser Projector with WiFi and Bluet | $1,149 | — | — |
| Optoma UHZ36 4K UHD Laser HDR Home Theater Projector - Black | $1,199 | 4.0★ | — |
| ViewSonic LX700-4K UHD 3500 Lumens Laser Projector Designed | $1,239 | 4.0★ | — |
| BenQ TK800M 4K UHD Home Theater Projector with HDR and HLG | $1,276 | 4.5★ | — |
ViewSonic PX749-4K head-to-head comparisons
- BenQ TK700 vs ViewSonic PX749-4K
Two 4K console-gaming projectors around $1,200, head to head
Where it fits
ViewSonic PX749-4K FAQ
- How far from the screen should the ViewSonic PX749-4K be for a 100-inch image?
- Between 8' 2" and 10' 8" from lens to screen, depending on the zoom setting (throw ratio 1.13-1.47:1).
- What is the input lag of the ViewSonic PX749-4K?
- 1080p / 240 Hz (Ultra-Fast Input): 4.2 ms. Source: ViewSonic’s published rating; we found no independent measurement.
- Does the ViewSonic PX749-4K have lens shift?
- No. It has a fixed vertical offset of 120% ±6% and a 1.3x optical zoom, so the image position is set by where the projector sits.
Sources
Price, stock and rating come from Amazon and update automatically (last checked Nov 14, 2026, 8:00 PM).
Disclosure: As an Amazon Associate we earn from qualifying purchases. We also participate in the eBay Partner Network. We may earn a commission when you click through an affiliate link and make a purchase, at no extra cost to you. Prices and availability shown are accurate as of the time posted but are subject to change. Any price and availability information displayed at the time of purchase will apply.