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  3. GT3500HDR vs LSD400HD-ST

Optoma GT3500HDR vs ViewSonic LSD400HD-ST

What GT3500HDR does better (1) and where LSD400HD-ST wins (5) — every spec side by side.

Optoma GT3500HDR
Optoma · 2024GT3500HDR
3.7Score
1 advantage≈ US$1,650
vs
ViewSonic LSD400HD-ST
ViewSonic · 2025LSD400HD-ST
6.7Score
5 advantages≈ US$1,450
Higher score
5.6Picture6.1
2.0Noise, lifetime & portability5.5

Why is GT3500HDR better than LSD400HD-ST?

  1. Contrast ratio (dynamic / claimed)500,000:1 vs 300,000:1+67%

Why is LSD400HD-ST better than GT3500HDR?

  1. Light source life3,500 h vs 20,000 h5.7×
  2. Brightness (ANSI / ISO lumens)3,800 lm vs 4,000 lm+5%
  3. Largest image size100″ vs 300″3×
  4. Audio outputNo · GT3500HDR: Yes
  5. Fan noise34 dB vs 32 dB+6%
Specifications

Side by side

Optoma GT3500HDROptoma GT3500HDR≈ US$1,6503.7
ViewSonic LSD400HD-STViewSonic LSD400HD-ST≈ US$1,4506.7
Picture
Resolution (on screen)1920 × 1080 (Full HD)1920 × 1080 (Full HD)
Native panel resolution1920 × 1080 (Full HD)1920 × 1080 (Full HD)
Display technologyDLPDLP
Light sourceLaserLaser
Brightness (ANSI / ISO lumens)3,800 lm4,000 lm
Contrast ratio (dynamic / claimed)500,000:1300,000:1
HDR supportYes—
HDR formatsHLG—
Gaming
Maximum refresh rate120 Hz—
Lens & placement
Throw ratio2:1—
Throw typeStandard throw (1.0:1 and longer)—
Distance for a 100″ 16:9 image4.43 m—
Largest image size100″300″
Keystone correction—Yes
Automatic keystone correction—No
Connectivity
HDMI inputs22
USB portYesYes
Ethernet (LAN)YesYes
VGA inputNoNo
Audio outputNoYes
Battery, power & lifetime
Light source life3,500 h20,000 h
Light source life (eco mode)—30,000 h
Design & noise
Fan noise34 dB32 dB
Fan noise (eco mode)27 dB27 dB
Weight—3.1 kg
Width—286 mm
Height—129 mm
Depth—216 mm
Colours—White
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