The difference that matters
The BenQ LK830ST throws a given image from closer (ratio 0.5 against 0.69). The BenQ LK830ST costs $400 less at the prices we observed.
Side by side
| Specification | BenQ AK700ST | BenQ LK830ST |
|---|---|---|
| Brightness | 4,000 lm | 4,000 lm |
| Resolution | 4K UHD (3840 × 2160) | 4K UHD (3840 × 2160) |
| Native aspect | 16:9 | 16:9 |
| Throw ratio | 0.69–0.83:1 | 0.5:1 |
| Distance for a 10.5 × 8 ft 4:3 screen | 9′ 8″ | 7′ |
| Brightness on that screen | 36 fL | 36 fL |
| Light source | Laser | Laser |
| Rated life | 20,000 h | 20,000 h |
| Zoom | 1.2× | Fixed |
| Lens shift | — | — |
| Input lag | 16 ms (1080p game mode); 33 ms at 4K | — |
| Price seen | $2,899 | $2,499 |
Highlighted rows differ. Figures come from each product's sources; room depth, distances and brightness are FOREference calculations using the same method for both.
Which should you choose?
BenQ AK700ST
Choose the BenQ AK700ST if you prefer its maker, seller or ecosystem — the published figures do not favour it.
BenQ LK830ST
Choose the BenQ LK830ST if you need to mount it close to the screen or price leads the decision.
Before you buy either
- Check the room: room size calculator and ceiling height calculator.
- Confirm what each seller includes — accessories, software trials and bundles change often.
- Read the limitations on each full reference page.
FOREference compares published specifications; we have not tested these products side by side. How we work · Disclosure