Optoma GT2400HDR vs BenQ TH671ST
Optoma GT2400HDR (#2, best value) vs BenQ TH671ST (#5): in our Projectors for Golf Simulators scoring the Optoma GT2400HDR totals 9.1/10 and the BenQ TH671ST 8.2/10. At $1,199 versus $949, the BenQ TH671ST costs $250 less.
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TopsFive comparison scores
Side by side
| Optoma GT2400HDR | BenQ TH671ST | |
|---|---|---|
| Price | $1199 | $949 |
| Resolution | 1080p Full HD (4K HDR input) | 1080p Full HD |
| Rated Brightness | 4,200 lumens | 3,000 ANSI lumens |
| Throw Ratio | 0.496:1 (fixed short throw) | 0.69–0.83:1 (short throw) |
| Lowest Input Lag | 8.4 ms (1080p/120Hz) | 16.7 ms (1080p/60Hz) |
| Light Source | DuraCore laser | Lamp (DLP) |
| Light Source Life | 30,000 hours (Eco) | 4,000–15,000 hours (LampSave) |
| Zoom & Adjustment | Fixed lens, digital keystone | 1.2x optical zoom, auto vertical keystone |
| 100" Image From | About 3.6 ft | About 4.9 ft |
How they differ in real use
Built from our projectors for golf simulators scoring, each product's published specifications, and verified owner feedback — not hands-on testing.
Both the Optoma GT2400HDR and the BenQ TH671ST made our Top 5 Projectors for Golf Simulators, at #2 (best value) and #5. Nearly all of the practical golf-sim performance for $700 less than the BenQ: it's the brightest projector here at 4,200 rated lumens, has the group's lowest input lag at 8.4 ms, adds a dedicated golf sim picture mode, and its IP6X-sealed 30,000-hour laser is built for dusty garage bays. It beats the older GT2100HDR on the golf mode, marginally lower lag, and first-party Amazon stock; only the TK710STi's 4K image and zoom flexibility keep it from the top spot. The most proven projector in home golf simulation — sim specialists from Carl's Place to Rapsodo have packaged it for years, and its 1.2x zoom makes placement more forgiving than any fixed-lens Optoma. It ranks last in 2026 on hardware economics alone: its lamp dims with age and lacks dust sealing, and at its current Amazon price it costs more than the brighter, laser-based GT2000HDR. Choose it for the track record and zoom flexibility, not the spec sheet.
We score projectors for golf simulators on Image Brightness & Quality (30%), Input Lag (20%), Throw & Mounting Flexibility (20%), Reliability & Maintenance (15%) and Value (15%). On that basis the Optoma GT2400HDR totals 9.1 out of 10 and the BenQ TH671ST 8.2. The widest gap is Image Brightness & Quality, where the Optoma GT2400HDR scores 9 against 8 for the BenQ TH671ST — lumens on an impact screen, resolution, and color. Reliability & Maintenance also separates them: 9.2 for the Optoma GT2400HDR versus 7.2 for the BenQ TH671ST. The BenQ TH671ST claws back ground on Throw & Mounting Flexibility.
On paper, the specifications that actually differ: Resolution — 1080p Full HD (4K HDR input) on the Optoma GT2400HDR versus 1080p Full HD on the BenQ TH671ST; Rated Brightness — 4,200 lumens on the Optoma GT2400HDR versus 3,000 ANSI lumens on the BenQ TH671ST; Throw Ratio — 0.496:1 (fixed short throw) on the Optoma GT2400HDR versus 0.69–0.83:1 (short throw) on the BenQ TH671ST; Lowest Input Lag — 8.4 ms (1080p/120Hz) on the Optoma GT2400HDR versus 16.7 ms (1080p/60Hz) on the BenQ TH671ST; Light Source — DuraCore laser on the Optoma GT2400HDR versus Lamp (DLP) on the BenQ TH671ST; Light Source Life — 30,000 hours (Eco) on the Optoma GT2400HDR versus 4,000–15,000 hours (LampSave) on the BenQ TH671ST.
Pricing as of July 18, 2026: $1,199 for the Optoma GT2400HDR and $949 for the BenQ TH671ST, a $250 difference in the BenQ TH671ST's favor. Owners praise the Optoma GT2400HDR for brightest pick here at 4,200 rated lumens — the safest choice for garages and rooms with ambient light hitting the impact screen and lowest input lag of the group at 8.4 ms (1080p/120Hz), with a dedicated golf sim picture mode tuned for grass and sky tones; the most common complaint is 1080p resolution — course detail is visibly softer than the BenQ TK710STi's 4K image on a large screen. Owners praise the BenQ TH671ST for the most proven projector in home golf simulation, with years of owner installs and setup guides from Carl's Place, Rapsodo, and other sim specialists and 1.2x optical zoom and auto vertical keystone make placement more forgiving than any fixed-lens Optoma; the most common complaint is lamp light source dims over time and eventually needs replacement (rated 4,000 hours in normal mode, up to 15,000 in LampSave) — every laser pick here is rated 20,000-30,000 hours.
Optoma GT2400HDR
- Brightest pick here at 4,200 rated lumens — the safest choice for garages and rooms with ambient light hitting the impact screen
- Lowest input lag of the group at 8.4 ms (1080p/120Hz), with a dedicated golf sim picture mode tuned for grass and sky tones
- 0.496:1 throw fills a 100-inch image from about 3.6 ft, fitting even very shallow bays with the projector safely out of swing range
- IP6X dust-sealed optics and a 30,000-hour laser suit dusty garage installs; sold and shipped by Amazon directly
- 1080p resolution — course detail is visibly softer than the BenQ TK710STi's 4K image on a large screen
- Fixed lens with no optical zoom means mounting position must be calculated exactly; all image-size adjustment is physical
- New to market in 2025, so long-term owner feedback is still thin compared with the GT2100HDR and TH671ST
BenQ TH671ST
- The most proven projector in home golf simulation, with years of owner installs and setup guides from Carl's Place, Rapsodo, and other sim specialists
- 1.2x optical zoom and auto vertical keystone make placement more forgiving than any fixed-lens Optoma
- 16.7 ms input lag and a dedicated low-latency game mode keep simulator response crisp
- Dual HDMI inputs and a built-in 5W speaker simplify simple one-cable setups
- Lamp light source dims over time and eventually needs replacement (rated 4,000 hours in normal mode, up to 15,000 in LampSave) — every laser pick here is rated 20,000-30,000 hours
- At around $949 on Amazon it currently costs more than the brighter, laser-based Optoma GT2000HDR
- No dust sealing, which matters in garage bays where turf infill and dust circulate
Which should you buy?
The Optoma GT2400HDR is the better fit for garage bays with ambient light that need maximum brightness and shallow rooms 10-12 ft deep — it is the higher-scoring pick here, chiefly for Image Brightness & Quality and Reliability & Maintenance. The BenQ TH671ST is the better fit for buyers who want the most documented, widely-supported entry sim projector and installs that need zoom flexibility on a budget, and the stronger choice if Throw & Mounting Flexibility matters more to you than the overall score. If the $250 saving matters more than Image Brightness & Quality, the BenQ TH671ST is the better value. The Optoma GT2400HDR is a poor fit for buyers set on 4K resolution; the BenQ TH671ST is a poor fit for set-and-forget garage installs (lamp maintenance, no dust sealing).
Choose the Optoma GT2400HDR if
- Garage bays with ambient light that need maximum brightness
- Shallow rooms 10-12 ft deep
- Buyers who want current-generation hardware with first-party Amazon stock
Skip it if
- Buyers set on 4K resolution
- Installs that need optical zoom to fine-tune image size
Choose the BenQ TH671ST if
- Buyers who want the most documented, widely-supported entry sim projector
- Installs that need zoom flexibility on a budget
- Multi-use rooms where the projector doubles for movies and gaming
Skip it if
- Set-and-forget garage installs (lamp maintenance, no dust sealing)
- Bright rooms needing 4,000+ lumens
Common questions
Is the Optoma GT2400HDR better than the BenQ TH671ST?
In our Projectors for Golf Simulators ranking the Optoma GT2400HDR scores higher overall, 9.1 to 8.2, with the biggest advantage in Image Brightness & Quality. The BenQ TH671ST is stronger on Throw & Mounting Flexibility, so it is the better pick if that matters most to you.
How much more does the Optoma GT2400HDR cost than the BenQ TH671ST?
$250 more as of July 18, 2026: $1,199 for the Optoma GT2400HDR against $949 for the BenQ TH671ST. Prices move, so the merchant page shows the current figure. What the extra buys is mostly Image Brightness & Quality — 9 versus 8 in our scoring.
What is the main difference between the Optoma GT2400HDR and the BenQ TH671ST?
The headline spec difference is Resolution: 1080p Full HD (4K HDR input) on the Optoma GT2400HDR versus 1080p Full HD on the BenQ TH671ST. In use, the gap that matters most is Image Brightness & Quality (9 vs 8 in our scoring): lumens on an impact screen, resolution, and color.