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Comparison

LK830ST vs ZK431ST-B

BenQ LK830STBenQLK830ST
$2,499
Buy at Indoor Golf Outlet · $2,499, LK830ST
vs
Optoma ZK431ST-BOptomaZK431ST-B
$1,799
Buy at Indoor Golf Outlet · $1,799, ZK431ST-BCompare 2 retailers

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A side-by-side look at how the BenQ LK830ST and Optoma ZK431ST-B compare on specs, accuracy, room requirements, and price. No hype — just the parts of the decision a buyer actually weighs.

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More comparisons with the LK830ST and ZK431ST-B

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Prices confirmed Nov 10, 2026 · we check every retailer daily

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Prices confirmed Nov 10, 2026 · we check every retailer daily

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Full specificationsEvery spec for both, line by line

Specifications

The numbers, lined up.

Image

  • Resolution
    LK830ST4K UHD (3840×2160)
    ZK431ST-B4K UHD (3840×2160); Optoma calls it True 4K UHD and names no chip
  • Lumens
    LK830ST4,000 ANSI
    ZK431ST-B4,100 (ISO 21118)
  • Picture Mode
    LK830STGolf picture mode
    ZK431ST-BGolf Sim colour mode (preset)
  • Screen Size
    LK830ST—
    ZK431ST-B36–300 in (Optoma's spec table says 30–300, its feature list 36–300; the narrower range is used)

Hardware

  • Light Source
    LK830STLaser (20,000 hours normal, 30,000 eco)
    ZK431ST-BDuraCore laser (30,000 hours, eco)
  • Throw Ratio
    LK830ST0.496:1 (fixed)
    ZK431ST-B0.496:1 (short throw, fixed)
  • Offset
    LK830ST114%; no lens shift
    ZK431ST-B—
  • Dimensions
    LK830ST10.99 × 9.03 × 4.74 in (W × D × H)
    ZK431ST-B—
  • Lens
    LK830ST—
    ZK431ST-BFixed 0.496:1 short-throw lens (no zoom, no lens shift)
  • Keystone
    LK830ST—
    ZK431ST-B±15° with Smart Fit auto-alignment

Requirements

  • Throw Distance
    LK830ST100 in at about 3.6 ft (BenQ's manual)
    ZK431ST-B—

Performance

  • Input Lag
    LK830ST16.7 ms at 4K/60Hz; 8.3 ms at 1080p/120Hz; 4.2 ms at 1080p/240Hz (BenQ)
    ZK431ST-B16.8 ms at 4K/60Hz and 8.6 ms at 1080p/120Hz with Enhanced Gaming on (Optoma's page says 16.7 ms at 4K/60; the manual's 16.8 is used); 33.5 ms at 4K/60 with it off. Keystone and four-corner correction are disabled in low-latency mode

Room planner

See each one in your sim room.

The planner draws each unit to scale with your room and your swing: where it mounts, the throw it needs, and whether your shadow crosses the light. Put in your room once, then switch units in the planner to compare.

See the LK830ST in your sim room →See the ZK431ST-B in your sim room →
Persona fitWho each one is better for

Who each one is better for

Honest persona fit, side by side.

Better for ZK431ST-B

  • Performance Seeker

    4K with published low lag and a dedicated Golf Sim colour preset, so there is a sensible starting point without a calibration session. 4,100 lumens holds up in a room that is not fully blacked out.

  • Space-Constrained

    0.496:1 puts a 100-inch image up from about 3.6 feet, so it mounts close and stays out of the swing path. That is the tightest throw in the catalog, shared in 4K with the GT3900UHD, UHZ35ST and BenQ LK830ST.

  • Family Setup

    Bright enough for a room with ambient light and fast enough to game on, which is what a shared room actually gets used for between rounds.

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