ViewSonic LSD400HD-ST vs ViewSonic LSD400W

Bold marks the better figure where both are stated to the same standard. “—” means the manufacturer doesn't state it.

	ViewSonic LSD400HD-ST MSRP $1,099.99	ViewSonic LSD400W MSRP $699.99
Display system
Imaging technology	DLP	DLP
Technology brand	DLP	DLP
Number of imaging devices	1	1
Chip / panel diagonal	0.65 in	0.65 in
Native aspect ratio	—	16:10
Native resolution	1920 × 1080	1280 × 800
Addressable resolution	—	1280 × 800
Optics
Throw ratio	0.49–0.5:1	1.54–1.72:1
Projection distance table	40″: 0.44 m · 50″: 0.55 m · 60″: 0.66 m · 70″: 0.77 m · 80″: 0.88 m · 90″: 0.99 m · 100″: 1.1 m · 110″: 1.21 m · 120″: 1.32 m · 130″: 1.43 m · 140″: 1.54 m · 150″: 1.65 m · 200″: 2.2 m · 250″: 2.75 m · 300″: 3.29 m	30″: 1–1.11 m · 40″: 1.33–1.48 m · 50″: 1.66–1.85 m · 60″: 2–2.22 m · 70″: 2.33–2.59 m · 80″: 2.66–2.96 m · 90″: 2.99–3.33 m · 100″: 3.33–3.71 m · 110″: 3.66–4.08 m · 120″: 3.99–4.45 m · 130″: 4.32–4.82 m · 140″: 4.66–5.19 m · 150″: 4.99–5.56 m · 200″: 6.65–7.41 m · 250″: 8.31–9.26 m · 300″: 9.98–11.11 m
Zoom type	None	Optical
Zoom ratio	—	1.1×
Focus	Manual	Manual
Fixed offset	132%	124%
Focal length	7.51 mm	21.85–24 mm
F-number	2.8	2.4–2.53
Image size range	40–300 in	30–300 in
Vertical keystone	-15–15°	-30–30°
Horizontal keystone	-15–15°	-30–30°
Corner / warp correction	4pt	4pt
Light source
Light source type	Laser (phosphor)	Laser (phosphor)
Light source detail	3rd-generation laser phosphor	3rd generation laser phosphor
Light source life	Normal: 20,000 h · Eco: 30,000 h	Normal: 20,000 h · Eco: 30,000 h
Warm-up time	—	0 s
Cool-down time	—	0 s
Brightness
ANSI lumens	4,000 lm	4,000 lm
Claimed brightness (non-standard)	4,800	4,800
Claimed brightness unit	Unspecified	Unspecified
Contrast & black level
Dynamic contrast	3,000,000:1	3,000,000:1
Colour
Bit depth / 'number of colours'	30 bit	30 bit
Calibration & picture control
Colour management system	—	6-axis
HDR
HDR formats	HDR10, HLG	—
Motion & gaming
Max refresh rate	—	1280×720: 120 Hz
Audio
Speaker power	15 W	3 W
Speaker count	1	1
Audio channels	—	Mono
Audio outputs	3.5 mm	3.5 mm
Inputs, control & connectivity
Max input signal	3840 × 2160	1920 × 1200
HDMI port count	2	2
HDMI ports (feature-level)	HDMI 1: HDMI 2.0, HDCP 2.2; HDMI 2: HDMI 2.0, HDCP 2.2	HDMI 1: HDMI 1.4, HDCP 1.4; HDMI 2: HDMI 1.4, HDCP 1.4
Horizontal scan frequency	15–135 kHz	15–102 kHz
Vertical scan frequency	24–120 Hz	24–120 Hz
RS-232	Yes	Yes
LAN control	Yes	No
Wired IR input	—	Yes
Control ecosystem drivers	Crestron	—
Ethernet	Yes	No
3D
3D support	Yes	Yes
3D sync method	DLP-Link	DLP-Link
3D formats	Frame packing, Side-by-side, Top-bottom	Frame sequential
Acoustic noise
Fan noise (sound pressure)	Normal: 32 dB(A) · Eco: 27 dB(A)	Normal: 30 dB(A) · Eco: 25 dB(A)
Environment & power
Operating temperature	0–40°C	0–40°C
Operating humidity	10–80%RH	10–80%RH
Altitude / high-altitude mode	3,658 m	3,658 m
High-altitude mode	Yes	Yes
Operating orientations	Table, Ceiling, Rear, Portrait, 360°	Ceiling, Portrait, 360°
Rated voltage	100–240 V	100–240 V
Rated frequency	50–60 Hz	50–60 Hz
Power consumption by mode	Normal: 143 W	Normal: 114 W
Standby power	0.5 W	0.5 W
Power supply	External brick	External brick
Physical & installation
Width	286 mm	286 mm
Depth	216 mm	216 mm
Height	129 mm	129 mm
Weight	3.1 kg	3.1 kg
Ingress protection	IP6X	IP6X
Sealed optical engine	Yes	Yes
Air filter	None	None
Safety & compliance
Photobiological risk group	RG2	RG2
Hazard distance	—	1 m
Laser product class	Class 1	Class 1
Safety & market certifications	CE, FCC	CE, FCC
Support & ownership
Warranty	🇺🇸 US 3 yr	🇺🇸 US 3 yr
User manual	https://www.viewsonicglobal.com/public/products_download/user_guide/projector/LSD400HD-ST/LSD400HD-ST_UG_ENG.pdf	https://www.viewsonicglobal.com/public/products_download/user_guide/projector/LSD400W/LSD400W_UG_ENG.pdf
In the box
Box contents	Projector, Remote control, Batteries, Quick start guide, Power cord, Power adapter	Projector, Remote, Batteries, Quick start guide, Power cord, Power adapter
Remote type	IR	IR