Our take
The BenQ TK800 is a lamp-based 4K UHD home projector for a room that can use its conventional 1.47–1.76:1 throw and fixed optical position. It combines a published 3000 ANSI-lumen rating with a high-resolution output mode, but those specifications do not establish the current state of a used lamp.
A home cinema with a measured conventional throw where 4K UHD output and a documented ANSI rating are priorities.
It is not a native SXRD 4K panel, ultra-short-throw projector, battery device, or smart projector with integrated streaming apps.
Pros & cons
What could work for you, and what to consider before buying.
What works in its favor
- BenQ specifies 4K UHD 3840 × 2160 output and a 0.47-inch DLP DMD.
- The 3000 ANSI-lumen rating has a stated measurement basis.
- A 1.2× zoom and HDMI 2.0/HDCP 2.2 support a conventional home-video setup.
What to weigh up
- The displayed 4K mode should not be confused with 8.3 million physical mirrors on the DMD.
- A conventional throw requires a measured room distance and suitable mounting.
- Lamp hours, current brightness, and condition vary by used unit.
The key details
| Model covered | TK800 |
|---|---|
| Image format | 4K UHD 3840 × 2160 displayed output from a 0.47-inch DLP device |
| Rated light output | 3000 ANSI lumens |
| Placement | 1.47–1.76:1 throw with 1.2× manual zoom |
Performance figures are manufacturer claims. Source checked October 10, 2026. Regional models and included accessories can differ.
What the features mean for you
What does BenQ mean by 4K UHD?
BenQ specifies 3840 × 2160 4K UHD output and a 0.47-inch DLP DMD for the TK800. The source supports the displayed output resolution, but the DMD size does not mean it contains 8.3 million physical mirrors. The product uses image-shifting technology to present the stated 4K UHD image. This distinction is useful when comparing it with projectors whose 4K imaging uses a different panel design. Match the projector to the quality of the source and the screen distance, and avoid turning a marketing resolution label into an unsupported claim about the physical chip.
How does the ANSI rating help?
BenQ lists 3000 ANSI lumens, which provides a standard measurement basis for comparing rated light output across this catalog. It is an original model specification, not a promise about a used projector after years of lamp use. The TK800 uses a 240 W lamp, and BenQ's stated lamp life varies by normal, Eco, and SmartEco mode. Ask for the lamp-hour count, inspect the image for uneven color or dust, and consider replacing an old lamp when condition is uncertain. Room light and screen size still affect viewing; the number does not guarantee daylight performance.
Will the lens fit the room?
The TK800 has a 1.47–1.76:1 throw ratio and 1.2× manual zoom. BenQ's sheet describes a 100-inch image at about 3.25 meters, which is a helpful starting point for a conventional setup. Measure from the intended lens position, not the back of the chassis, and leave enough room for power and HDMI cables. The datasheet lists vertical digital keystone but no optical lens shift, so mount alignment matters. It is not an ultra-short-throw model; a cabinet close to the screen calls for a different optical design.
What sources and sound can it support?
The datasheet lists two HDMI inputs: one HDMI 2.0 with HDCP 2.2 and another HDMI 1.4a with HDCP 1.4. This gives a clear connection path for a modern streaming box, disc player, or console, but BenQ does not document installed streaming apps. The built-in speaker is a single 5 W unit and may be adequate for a temporary setup, while a dedicated theater usually benefits from separate audio. Check which HDMI input supports the desired source and resolution, and test handshakes with protected content on the exact unit.
Who should choose a different 4K projector?
Choose the TK800 for a fixed room with a suitable conventional throw and a documented ANSI rating. BenQ TK850 is a later related home model with its own source facts, while Sony VPL-VW295ES uses native SXRD 4K imaging and offers a different panel and installation profile. A close-wall room should consider an UST model rather than relying on keystone. A buyer comparing TK800 with TK800M should verify the exact suffix; their product facts and source records are not interchangeable. Used lamp condition, focus uniformity, fan noise, remote, and original cables need checking separately from the published model sheet.
What else to compare
BenQ TK850 is a related home model with a separate fact sheet; Sony VPL-VW295ES uses native SXRD 4K imaging; UST models suit close-wall furniture.
Before you buy
Does the TK800 display 4K UHD?
BenQ specifies 3840 × 2160 4K UHD output from its 0.47-inch DLP device.
Is 3000 lumens an ANSI rating?
Yes. BenQ's TK800 datasheet identifies the 3000-lumen figure as ANSI lumens.
Does the TK800 use a close-wall UST lens?
No. Its listed 1.47–1.76:1 throw is conventional, not ultra-short throw.
Where can I check the current price?
Use the Amazon link for current offers. Check the exact model, seller, product condition, delivery, and return terms. This page does not display a live price or confirm stock.
Sources & review basis
We use the following manufacturer documentation for the product features above. Our suitability notes and buying advice are editorial judgments based on those features, not measured performance results.
- BenQ TK800 official datasheet and support page ↗ — checked October 10, 2026.
- BenQ TK800 official datasheet ↗ — checked October 10, 2026.
- BenQ TK800 official support and downloads ↗ — checked October 10, 2026.
The decision
Choose TK800 for BenQ's documented 4K UHD output and 3000 ANSI-lumen specification when the room fits its throw and a used lamp checks out.
Is it the right fit?
Check the exact model and today’s offers on Amazon.