Optoma 4K400STx for Golf Simulators: Throw Distance & Brightness

Throw distance for simulator screens

Simulator screens are usually 4:3 or square, while most projectors are 16:9 or 16:10. To fill a squarer screen, the projector's full frame is set so its height matches the screen height; the extra width is masked in software. That means the throw distance depends on the projector's native frame width, not the screen width.

Screen	Full 16:9 frame width	Lens-to-screen distance
10.5 × 8 ft (4:3)	14.0 ft	7′
12 × 9 ft (4:3)	16.0 ft	8′
8 × 8 ft (1:1)	14.2 ft	7′ 1″
12 × 7.5 ft (16:10)	13.3 ft	6′ 8″
14 × 7.9 ft (16:9)	14.0 ft	7′

FOREference calculationDistance = throw ratio × full frame width. Frame width = screen height × 16:9 when the screen is squarer than the projector. Try your own screen.

How bright will it look?

Brightness on the screen is what the golfer sees. We convert the rated lumens into foot-lamberts (fL) for each screen, counting only the share of the frame that lands on the screen, and assuming a screen gain of 1.0. Real results are lower in eco modes and as the light source ages.

Screen	Frame on screen	Brightness	What that means
10.5 × 8 ft (4:3)	75%	36 fL	good in a dim room
12 × 9 ft (4:3)	75%	28 fL	best in a dark room
8 × 8 ft (1:1)	56%	35 fL	good in a dim room
12 × 7.5 ft (16:10)	90%	40 fL	good in a dim room
14 × 7.9 ft (16:9)	100%	36 fL	good in a dim room

FOREference calculationfL = rated lumens × share of frame on screen × gain ÷ screen area (sq ft). Cinema reference is roughly 14–16 fL in a dark room.

Resolution and aspect ratio on a sim screen

The seller lists 4K UHD (3840 × 2160) with a native 16:9 frame. On a squarer screen part of the frame is unused, so the effective resolution drops.

Screen	Pixels on the screen	Share of native frame
10.5 × 8 ft (4:3)	2,880 × 2,160	75%
12 × 9 ft (4:3)	2,880 × 2,160	75%
8 × 8 ft (1:1)	2,160 × 2,160	56%
12 × 7.5 ft (16:10)	3,456 × 2,160	90%
14 × 7.9 ft (16:9)	3,840 × 2,160	100%

Practical noteSellers list this model as 4K UHD. Many DLP projectors in this class create 4K UHD by shifting pixels on a lower-resolution chip; check the manufacturer's specification if native 4K matters to you.

Light source and running

A lamp gradually dims and eventually needs replacing; budget for a spare if you play daily.

Ownership figure	Value
Rated light-source life	15,000 h (Dynamic mode)
At 2 hours a day	about 21 years
At 4 hours a day (heavy use)	about 10 years
Input lag	About 4 ms (enhanced gaming mode)

FOREference calculationYears = rated hours ÷ (hours per day × 365). Brightness falls gradually before the rated life is reached.

Fit check: Optoma 4K400STx

Planning checks from the published specification and our screen calculations.

✓ Required? Check firsti Good to know

✓MountingMount sold separately. Short-throw models usually ceiling-mount just in front of the golfer so the swing does not cast a shadow; floor enclosures are an alternative. See projector mounts.
✓Throw distanceAbout 7′ lens-to-screen for a 10.5 × 8 ft 4:3 screen.
?Screen shapeNative 16:9; on a 4:3 screen 75% of the frame is used.
?Image alignmentNo lens shift listed — align by mount position.
iCablingPlan an HDMI run from the PC or phone/tablet to the projector; long runs may need an active or fibre HDMI cable.

Specifications

Each figure is labelled with where it comes from. Numbered references link to the source list below.

Manufacturer storeRetailer listingFOREference calculationNot verified

Published specifications

Brightness	4,000 ANSI lumens[S1]	Retailer listing
Resolution	4K UHD (3840 × 2160)[S1]	Retailer listing
Native aspect ratio	16:9[S1]	Retailer listing
Display technology	DLP[S1]	Retailer listing
Light source	Lamp[S1]	Retailer listing
Light-source life	Up to 15,000 hours (Dynamic mode)[S1]	Retailer listing
Throw ratio	0.5:1[S1]	Retailer listing
Zoom	Fixed[S1]	Retailer listing
Input lag	About 4 ms (enhanced gaming mode)[S1]	Retailer listing
Weight	8.8 lb[S1]	Retailer listing

FOREference calculations

Throw distance, 10.5 × 8 ft 4:3 screen	7′	FOREference calculation
Brightness on that screen	36 fL	FOREference calculation

Limitations to weigh

Lamp light source: brightness fades and the lamp needs replacing.
Fixed throw ratio — the projector position is set by the screen size.
Mount, cables and screen are not included.

Alternatives worth comparing

BenQ AH700ST4,000 lm, 1080p, throw 0.69–0.83; $10 more

Optoma UHZ35ST3,500 lm, 4K UHD, throw 0.496; $90 less

EIKI EK-308U6,000 lm, WUXGA, throw 1.07–1.75; $464 less

Panasonic PT-VZ580U5,000 lm, WUXGA; $889 less

Where to buy

Our link opens this exact product page. Prices and stock change; check before you order.

$2,289Rain or Shine Golf listed price · seen 30 Sep 2026

View at Rain or Shine Golf

Every link opens the product page for this exact model. We may earn a commission; it never changes what we publish. Disclosure

Questions buyers ask

How far from the screen does the Optoma 4K400STx go?

With a 0.5:1 throw ratio, about 7′ for a 10.5 × 8 ft (4:3) screen. Distance = throw ratio × the full frame width.

Is the Optoma 4K400STx bright enough for a golf simulator?

Rated at 4,000 ANSI lumens, it gives roughly 36 fL on a 10.5 × 8 ft screen — good in a dim room.

Will the Optoma 4K400STx fill a 4:3 golf screen?

Yes, by matching the screen height and masking the sides. Its native 16:9 frame means about 75% of the image is used on a 4:3 screen.

Laser or lamp: which does the Optoma 4K400STx use?

Lamp, rated up to 15,000 hours.

Sources and verification

Rain or Shine Golf — Optoma 4K400STx 4K Short Throw — product page and specifications Retrieved 30 Sep 2026

FOREference has not tested this product hands-on. This reference is compiled from the sources above; our calculations are labelled and show their working. Last verified 30 Sep 2026. How we work

Optoma 4K400STx

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