The catch
BenQ TK710
Premium RGB-laser models cover the wider cinema gamuts, while this model's color coverage peaks at roughly Rec.709.
Side by side
If you need a large picture from a short distance, the TK710STi is the choice. The TK710 is for a mount farther back, or for when vertical lens shift would help line up the image. Published brightness and main gaming response figures are tied between them, so the lens should decide this purchase.
Before you buy
Placement for the TK710STi is about 6.0–7.2 feet, and for the TK710 about 10.0–13.1 feet. If the lens is fixed at eight feet, it lands outside both optical bands.
Where this comes from
At 120 inches, a 16:9 image measures 104.6 inches across. Take that width times each throw-ratio endpoint, then divide by 12 to convert to feet. Digital zoom and keystone are not factored in.
The catch
Premium RGB-laser models cover the wider cinema gamuts, while this model's color coverage peaks at roughly Rec.709.
The catch
Without optical lens shift, even the short throw requires a shelf or mount that's centered.


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BenQ TK710 and TK710STi compared on the distance your screen requires, lens adjustment, streaming and gaming, with a 120-inch room-fit example to make the choice clear.
What the short-throw lens gives you is more freedom in where the projector goes. Published brightness is no higher and the 4K60 response is no faster.
Which one fits
Of the two, only the STi's optical range reaches this position.
From the back of the room, the standard TK710 gets to this size optically.
The TK710 lists vertical lens shift. The STi does not.
In the matching input mode, both list 16.7 ms.
In practice
Placement for the TK710STi is about 6.0–7.2 feet, and for the TK710 about 10.0–13.1 feet. If the lens is fixed at eight feet, it lands outside both optical bands.
At 120 inches, a 16:9 image measures 104.6 inches across. Take that width times each throw-ratio endpoint, then divide by 12 to convert to feet. Digital zoom and keystone are not factored in.
Compare the wide ends of the two lenses and the STi needs 40% less throw distance for the same picture width. That makes it easier to keep the projector ahead of your seating, though body depth and cable space still count.
1 minus 0.69 divided by 1.15 comes to 0.40. It covers lens-to-screen distance and nothing else.
Each lists 16.7 ms at 4K60 and 4.2 ms at 1080p240. Settle on the lens that works first, and the streaming bundle after that.
In BenQ's exact specification tables, these latency values are given for the same input formats. They are the manufacturer's claims rather than independent measurements.
Plug in your numbers
This checks hard limits only. Personal preferences are left out of the math.
For a 120-inch 16:9 picture, the calculated lens range is about 10.02 to 13.07 ft. You entered 9.50 ft.
For a 120-inch 16:9 picture, the calculated lens range is about 6.01 to 7.23 ft. You entered 9.50 ft.
Measure distance from the lens to the screen. The math assumes a 16:9 picture and uses the verified throw range for each exact model.

BenQ, TK710
This bright laser DLP is aimed at fast console and PC play. It has vertical lens shift and a compact standard-throw body.

BenQ, TK710STi
This short-throw variant of the TK710 offers the same laser brightness and low-latency modes from a spot much nearer the screen.
Spec by spec
| Spec | BenQ TK710 | BenQ TK710STi | In practice |
|---|---|---|---|
| Throw ratio | 1.15–1.50:1 | 0.69–0.83:1 | Much less distance between lens and screen is needed with the STi. |
| 120-inch optical distance | 10.0–13.1 ft | 6.0–7.2 ft | No single mounting distance works for both at this picture size. |
| Optical zoom | 1.3x | 1.2x | Around its longer throw, the standard model has more adjustment range. |
| Vertical lens shift | +10% | No lens shift listed | On the TK710 you can adjust height optically instead of falling back on keystone. |
| Streaming | External device required | Android TV device included | Factor in the extra streamer when you compare complete packages. |
| Brightness and 4K60 response | 3,200 ANSI lumens, 16.7 ms | 3,200 ANSI lumens, 16.7 ms | The published specs give no way to tell the pair apart. |
Trade-offs
Decision guide
Start by measuring from the lens to the screen, ahead of any feature comparison. Each of these two lenses is meant for a different spot in the room.
A shelf behind the sofa and a coffee table in front of it are very different starting points. Start with the picture size you want, then check the distance range that matches. If you buy the wrong lens and shrink the picture digitally, you end up paying for pixels you no longer use.
Vertical lens shift on the TK710 helps when the mount can't sit at the ideal height. With the short-throw model, pay closer attention to its fixed optical offset. Aim either unit straight at the screen before you resort to digital corrections, particularly for gaming and small text.
An Android TV device comes with the TK710STi, while the TK710 needs a separate streaming source unless you already have one. Either can take a console over HDMI. Before treating the projector alone as the complete system, check how many sources you need and how sound will get to your speakers.
By the numbers
What we found across the home projectors we compare, plus the checked facts behind each finding.
Only 3 of the 90 models checked meet every need here: “It will live in a bedroom or small apartment”, “My console is a PS5 or Xbox Series X”, and “It will stay up on a ceiling mount”.
3 models fit, out of 90 checkedHow we countedThe count uses each product's current fit ratings for “It will live in a bedroom or small apartment”, “My console is a PS5 or Xbox Series X”, and “It will stay up on a ceiling mount”. A need with no documented match is not counted.
| Product | Needs it meets | Facts we checked | Sources |
|---|---|---|---|
| BenQ TK710 |
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| BenQ TK710STi |
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Ready to buy
Open either model on Amazon for the current price, customer reviews and delivery options.

Roughly 10 to 13 feet separate the lens from your 120-inch screen.
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The lens is roughly 6 to 7 feet from your 120-inch screen.
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