BenQ LH830ST vs Optoma ZK431ST

BenQ LH830ST is quieter and in stock. Optoma ZK431ST is better for gaming and lighter.

	BenQ LH830ST$1,999.99 · Amazon Buy	Optoma ZK431ST

Key differences
White light output
White light output	4,000 lm ANSI	—
Native resolution
Native resolution	1080p (1920 × 1080)	—
Lowest input lag
Lowest input lag	16.7 msDerived	8.6 msDerived
HDR formats
HDR formats	HDR10, HLG	—
Fan noise
Fan noise	Normal 30 dB(A) · Eco 24 dB(A)	Normal 35 dB(A) · Eco 29 dB(A)
MSRP
MSRP	$1,999	—
Best price
Best price	$1,999.99	—
Room fit80″100″120″150″
Distance to screen
Distance to screen	1.1 m	1.1 m
Picture
White light output
White light output	4,000 lm ANSI	—
Claimed brightness (non-standard)
Claimed brightness (non-standard)	—	4,100 lm
Brightness uniformity
Brightness uniformity	—	75%
Imaging technology
Imaging technology	DLP	DLP
Chip / panel diagonal
Chip / panel diagonal	0.65 in	—
Native resolution
Native resolution	1080p (1920 × 1080)	—
Native aspect
Native aspect	16:9Derived	16:9Derived
Addressable resolution
Addressable resolution	—	4K UHD (3840 × 2160)
Dynamic contrast
Dynamic contrast	3,000,000:1	2,000,000:1
Colour gamut
Colour gamut	Rec. 709 93% coverage	—
Colour bit depth (per channel)
Colour bit depth (per channel)	10 bit	—
Gamma / EOTF presets
Gamma / EOTF presets	—	2.2, 2.4
HDR formats
HDR formats	HDR10, HLG	—
3D
3D	—	Yes
3D formats
3D formats	—	Frame packing, Side-by-side, Top-bottom
3D glasses sync
3D glasses sync	—	DLP-Link
Light source
Light source
Light source	Laser (phosphor)	Laser (phosphor)
Light-source life
Light-source life	20,000 h normal · 30,000 h eco	30,000 h eco
Optics
Throw ratio
Throw ratio	0.5:1	0.5:1
Image size
Image size	70–300 in	30–300 in
Projection offset
Projection offset	116%	114%
Zoom
Zoom	None	None
Focal length
Focal length	17.51 mm	7.51 mm
Aperture (f-number)
Aperture (f-number)	2.8	2.8
Focus
Focus	—	Manual
Vertical keystone
Vertical keystone	30°	15°
Horizontal keystone
Horizontal keystone	30°	15°
Auto keystone
Auto keystone	Yes	—
Corner correction
Corner correction	4-corner	4-corner
Grid warp
Grid warp	—	Yes
Motion & gaming
Input lag
Input lag	1080p: 60 Hz 16.7 ms	1080p: 60 Hz 16.7 ms · 120 Hz 8.6 ms · 4K UHD: 60 Hz 16.7 ms
Inputs & control
HDMI inputs
HDMI inputs	2 × HDMI 2.0 (HDCP 2.2)	2 × HDMI 2.0
Max input resolution
Max input resolution	4K UHD	4K UHD
Control ports
Control ports	RS-232	RS-232, 12 V trigger
Horizontal scan
Horizontal scan	15–135 kHz	15–150 kHz
Vertical scan
Vertical scan	23–120 Hz	24–240 Hz
Smart platform
Ethernet
Ethernet	Yes	Yes
Audio
Speaker power
Speaker power	15 W	15 W
Speakers
Speakers	1	1
Audio outputs
Audio outputs	3.5 mm	3.5 mm
HDMI audio return
HDMI audio return	NoneDerived	NoneDerived
Physical & installation
Dimensions (W × D × H)
Dimensions (W × D × H)	279 × 229 × 121 mm	274 × 216 × 109 mm
Weight
Weight	3,400 g	2,900 g
Orientations
Orientations	Table, Ceiling, Rear	360°
Ceiling mount
Ceiling mount	M4	M4, screws ≥ 10 mm
Ingress protection
Ingress protection	IP6X (light engine)	—
Sealed optical engine
Sealed optical engine	Yes	—
Environment & power
Operating temperature
Operating temperature	0–40°C	0–40°C
Operating humidity
Operating humidity	10–80%RH	—
Altitude
Altitude	3,000 m · high-altitude mode	3,048 m
Power draw
Power draw	Max 250 W · Normal 230 W · Eco 130 W	Max 178 W · Eco 125 W
Standby
Standby	Up to 0.5 W	Up to 0.5 W
Networked standby
Networked standby	Up to 2 W	—
Power supply
Power supply	—	External adapter
Mains input
Mains input	100–240 V · 50/60 Hz	100–240 V · 50/60 Hz
DC input
DC input	—	19.5 V
Fan noise
Fan noise	Normal 30 dB(A) · Eco 24 dB(A)	Normal 35 dB(A) · Eco 29 dB(A)
Safety & support
Laser class
Laser class	Class 1	Class 1
Risk group
Risk group	RG2	RG2
Hazard distance
Hazard distance	—	1 m
FDA laser notice
FDA laser notice	—	Notice 57
Marks
Marks	—	FCC
Warranty
Warranty	3 yr	5 yr
User manual
User manual	https://esupportdownload.benq.com/esupport/PROJECTOR%20FOR%20BUSINESS/UserManual/LH830ST/UM_EN_251023092502.pdf	—
In the box
In the box
In the box	Power cord, Power adapter, Remote, Remote batteries, Quick start guide, Warranty card	Power cord, Remote, Remote batteries, Quick start guide

BenQ LH830ST$1,999.99 · Amazon

Buy

Optoma ZK431ST