BenQ AH500ST vs ViewSonic LSD400W

	BenQ AH500ST MSRP $1,899	ViewSonic LSD400W $699.99
Key differences
Native resolution	1080p (1920 × 1080)	WXGA (1280 × 800)
Throw ratio	0.5:1	1.54–1.72:1
Lowest input lag	16.7 msDerived	—
HDR formats	HDR10, HLG	—
Fan noise	Normal 35 dB(A) · Eco 32 dB(A)	Normal 30 dB(A) · Eco 25 dB(A)
Price	MSRP $1,899	$699.99
Room fit80″100″120″150″
Distance to screen	1.1 m	3.3–3.7 m
Brightness
Rated brightness	4,000 lmDerived	4,000 lmDerived
White light outputANSI	4,000 lm ANSI	4,000 lm ANSI
Claimed brightness (non-standard)	—	4,800 lm
Display system
Imaging technology	DLP	DLP
Chip / panel diagonal	—	0.65 in
On-screen resolution	1080p (1920 × 1080)Derived	WXGA (1280 × 800)Derived
Native resolution	1080p (1920 × 1080)	WXGA (1280 × 800)
Native aspect	16:9Derived	16:10Derived
Contrast
Dynamic contrast	3,000,000:1	3,000,000:1
Colour
Colour gamut	Rec. 709 83% coverage	—
Colour bit depth (per channel)	10 bit	10 bit
Gamma / EOTF presets	2.2, 2.4, 2.6	—
HDR
HDR formats	HDR10, HLG	—
Calibration
Colour management (CMS)	—	6-axis
3D
3D	Yes	Yes
3D formats	+ Frame packing, + Side-by-side, + Top-bottom, Frame sequential	Frame sequential
3D glasses sync	—	DLP-Link
Light source
Light source	Laser (phosphor)	Laser (phosphor)
Emitter	Blue laser + phosphor	Blue laser + phosphor
Light-source life	20,000 h normal · 38,000 h eco	20,000 h normal · 30,000 h eco
Warm-up time	—	0 s
Cool-down time	—	0 s
Optics
Throw ratio	0.5:1	1.54–1.72:1
Image size	—	30–300 in
Projection offset	112%	124%
Zoom	None	Optical
Zoom ratio	—	1.11×Derived
Focal length	7.46 mm	21.85–24 mm
Aperture (f-number)	2.8	2.4–2.53
Focus	Motorised	Manual
Autofocus	Yes	No
Autofocus runs	On demand	—
Vertical lens shift	None	—
Horizontal lens shift	None	—
Vertical keystone	30°	30°
Horizontal keystone	30°	30°
Corner correction	—	4-corner
Motion & gaming
Max input refresh	1080p: 120 Hz	720p: 120 Hz
Max refresh at 1080p	120 HzDerived	—
Input lag	1080p: 60 Hz 33.4 ms · 120 Hz 16.7 ms	—
Lowest input lag	16.7 msDerived	—
Inputs & control
HDMI inputs	2 × HDMI 2.0 (HDCP 2.2)	2 × HDMI 1.4 (HDCP 1.4)
HDMI inputs (count)	2Derived	2Derived
Newest HDMI version	HDMI 2.0Derived	HDMI 1.4Derived
Max input resolution	4K UHD	WUXGA
Control ports	RS-232	RS-232, + Wired IR
Horizontal scan	15–102 kHz	15–102 kHz
Vertical scan	23–120 Hz	24–120 Hz
Smart platform
Ethernet	Yes	No
Audio
Speaker power	10 W	3 W
Speakers	1	1
Layout	—	Mono
Audio outputs	3.5 mm	3.5 mm
HDMI audio return	NoneDerived	NoneDerived
Physical & installation
Dimensions (W × D × H)	320 × 255 × 131 mm	286 × 216 × 129 mm
Weight	5,100 g	3,100 g
Orientations	+ Table, Ceiling, + Rear	Ceiling, + Portrait, + 360°
Ceiling mount	M4, 8 mm screws	—
Dust filter	—	None
Ingress protection	IP5X (light engine)	IP6X
Sealed optical engine	—	Yes
Environment & power
Operating temperature	0–40°C	0–40°C
Operating humidity	10–90%RH	10–80%RH
Altitude	3,000 m · high-altitude mode	3,658 m · high-altitude mode
Power draw	Max 300 W · Normal 250 W	114 W
Standby	Up to 0.5 W	Up to 0.5 W
Networked standby	Up to 2 W	—
Power supply	—	External adapter
Mains input	100–240 V · 50/60 Hz	100–240 V · 50/60 Hz
Noise
Fan noise	Normal 35 dB(A) · Eco 32 dB(A)	Normal 30 dB(A) · Eco 25 dB(A)
Safety & compliance
Laser class	—	Class 1
Risk group	RG2	RG2
Hazard distance	—	1 m
Marks	—	CE, FCC
Support & ownership
Warranty	3 yr	3 yr
User manual	https://esupportdownload.benq.com/esupport/PROJECTOR%20FOR%20CONSUMER/UserManual/AH500ST/AH500ST_UM_EN_241231102241.pdf	https://www.viewsonicglobal.com/public/products_download/user_guide/projector/LSD400W/LSD400W_UG_ENG.pdf
In the box
In the box	Power cord, Remote, Remote batteries, Quick start guide, + Warranty card, + Lens cap	Power cord, + Power adapter, Remote, Remote batteries, Quick start guide
Remote	IR	IR