Optoma GT2100HDR: Specs, Throw Distance & Alternatives
A short-throw 1080p DLP laser projector with a game mode. Optoma rates it at 4,200 lumens and 8.6 ms input lag at 1080p/120, rising to 17 ms with a 4K/60 signal. It is native 1080p (it accepts 4K input but does not display 4K) and has a fixed lens, no lens shift and no smart TV system.
Is the Optoma GT2100HDR right for you?
Good for
- Fast console and PC gaming: Optoma rates lag at 8.6 ms at 1080p/120
- Small rooms: a 0.496:1 short-throw lens, with a 100-inch image from about 3.6 ft
- HDR10 and HLG content
- Rooms with some light: 4,200 lumens rated
What to plan for
- Native 1080p: 4K sources are shown at 1080p, and Optoma rates lag at 17 ms with a 4K input
- No smart TV system and no wireless listed: add a streaming stick (the USB-A port supplies 1.5 A of power)
- No lens shift and no optical zoom, so placement has to be planned
- Audio out is 3.5 mm only; no ARC or optical out is listed
- Laser light source rated for up to 30,000 hours (Optoma does not split Normal and Eco)
Based on manufacturer specifications and published reviews (sources below). We don't do hands-on testing.
Optoma GT2100HDR specs
| Resolution | 1080p (1920 × 1080 native; accepts 4K input) |
|---|---|
| Brightness | 4,200 lumens (Optoma rating; ProjectorCentral lists it as ANSI) |
| Display technology | DLP |
| Light source | Laser phosphor (DuraCore) |
| Light source life | 30,000 hours |
| Contrast ratio | 300,000:1 (Optoma rating) |
| Throw ratio | 0.496:1 |
| Lens shift | None (fixed lens, fixed 116% offset) |
| Max refresh rate | 120 Hz |
| HDMI ports | 2 (HDMI 2.0) |
| Speakers | 15 W |
| Weight | 6.6 lb |
How far from the screen?
Lens-to-screen distance for a 16:9 image, calculated from its 0.496:1 throw ratio. The lens is fixed, so the distance sets the image size.
| Screen | Distance |
|---|---|
| 80″ | 2' 11" |
| 100″ | 3' 7" |
| 120″ | 4' 4" |
| 150″ | 5' 5" |
Optoma GT2100HDR input lag by mode
| Signal | Input lag |
|---|---|
| 1080p / 120 Hz (Enhanced Gaming Mode) | 8.6 ms |
| 4K input / 60 Hz | 17 ms |
Source: Optoma’s published ratings; we found no independent measurement. Its fastest figure (8.6 ms at 1080p / 120 Hz (Enhanced Gaming Mode)) is quicker than 57 of the 96 projectors with a lag figure in our input lag database, which lists each model's fastest mode.
Optoma GT2100HDR alternatives at a similar price
In-stock 1080p projectors priced closest to it on Amazon today.
| Model | Price today | Amazon rating | Compare |
|---|---|---|---|
| Optoma GT2100HDR (this one) | $1,213 | 4.0★ | — |
| Epson Pro EX11000 3-Chip 3LCD Full HD 1080p Wireless Laser P | $1,267 | 4.7★ | — |
| Optoma GT2400HDR - Full HD 1080p | $1,299 | — | — |
| ASUS ProArt A1 Professional Projector Calman Verified with 3 | $1,300 | 4.0★ | — |
| Optoma HD28HDR 1080p Home Theater Projector for Gaming and M | $1,030 | 4.2★ | — |
Where it fits
Optoma GT2100HDR FAQ
- How far from the screen should the Optoma GT2100HDR be for a 100-inch image?
- About 3' 7" from lens to screen. It has a fixed 0.496:1 lens, so each screen size has one distance.
- What is the input lag of the Optoma GT2100HDR?
- 1080p / 120 Hz (Enhanced Gaming Mode): 8.6 ms; 4K input / 60 Hz: 17 ms. Source: Optoma’s published ratings; we found no independent measurement.
- Does the Optoma GT2100HDR have lens shift?
- No. It has a fixed 0.496:1 short-throw lens with no lens shift and no optical zoom, so the image size and position are set by where the projector sits.
Sources
Price, stock and rating come from Amazon and update automatically (last checked Nov 14, 2026, 10:01 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.