BenQ LH830ST vs Optoma ZK521ST

BenQ LH830ST is $699.01 cheaper and in stock. Optoma ZK521ST is better for gaming and lighter.

	BenQ LH830ST$1,999.99 · Amazon Buy	Optoma ZK521STMSRP $2,699

Key differences
White light output
White light output	4,000 lm ANSI	5,000 lm ISO
Native resolution
Native resolution	1080p (1920 × 1080)	—
Throw ratio
Throw ratio	0.5:1	0.79:1
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)	Max 29 dB(A) · Eco 29 dB(A)
MSRP
MSRP	$1,999	$2,699
Best price
Best price	$1,999.99	—
Room fit80″100″120″150″
Distance to screen
Distance to screen	1.1 m	1.7 m
Picture
White light output
White light output	4,000 lm ANSI	5,000 lm ISO
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	—
HDR formats
HDR formats	HDR10, HLG	—
3D
3D	—	Yes
3D formats
3D formats	—	Frame packing, Side-by-side, Top-bottom
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	0.79:1
Image size
Image size	70–300 in	30–300 in
Projection offset
Projection offset	116%	104%
Zoom
Zoom	None	None
Focal length
Focal length	17.51 mm	11.6 mm
Aperture (f-number)
Aperture (f-number)	2.8	—
Focus
Focus	—	Manual
Vertical lens shift
Vertical lens shift	—	0–21%
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
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
Other video inputs
Other video inputs	—	VGA
Max input resolution
Max input resolution	4K UHD	—
Audio inputs
Audio inputs	—	3.5 mm
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 × 114 mm
Weight
Weight	3,400 g	3,000 g
Colours
Colours	—	White
Orientations
Orientations	Table, Ceiling, Rear	Portrait, 360°
Ceiling mount
Ceiling mount	M4	—
Ingress protection
Ingress protection	IP6X (light engine)	IP6X
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 196 W · Eco 147 W
Standby
Standby	Up to 0.5 W	Up to 0.5 W
Networked standby
Networked standby	Up to 2 W	—
Mains input
Mains input	100–240 V · 50/60 Hz	100–240 V · 50/60 Hz
Fan noise
Fan noise	Normal 30 dB(A) · Eco 24 dB(A)	Max 29 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	3 yr (light source 5 yr or 12,000 h)
User manual
User manual	https://esupportdownload.benq.com/esupport/PROJECTOR%20FOR%20BUSINESS/UserManual/LH830ST/UM_EN_251023092502.pdf	https://region-resource.optoma.com/products/documents/wFtzMmyO3OCool38MbOjdfDaDBHsVvtzzQkcczrK.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, User manual

BenQ LH830ST$1,999.99 · Amazon

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Optoma ZK521STMSRP $2,699