Optoma ZH400ST vs ViewSonic LS710HD

Optoma ZH400ST is lighter.

	Optoma ZH400STMSRP $2,599	ViewSonic LS710HD

Key differences
White light output
White light output	—	4,200 lm ANSI
Throw ratio
Throw ratio	0.5:1	0.49:1
Lowest input lag
Lowest input lag	17 msDerived	—
HDR formats
HDR formats	HDR10, HLG	—
Fan noise
Fan noise	Max 36 dB(A)	—
MSRP
MSRP	$2,599	—
Room fit80″100″120″150″
Distance to screen
Distance to screen	1.1 m	1.1 m
Picture
White light output
White light output	—	4,200 lm ANSI
Claimed brightness (non-standard)
Claimed brightness (non-standard)	4,000 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)	1080p (1920 × 1080)
Native aspect
Native aspect	16:9Derived	16:9Derived
Dynamic contrast
Dynamic contrast	2,000,000:1	3,000,000:1
Colour bit depth (per channel)
Colour bit depth (per channel)	10 bit	10 bit
HDR formats
HDR formats	HDR10, HLG	—
3D
3D	Yes	Yes
3D formats
3D formats	—	Side-by-side, Top-bottom, Frame sequential
3D glasses sync
3D glasses sync	DLP-Link	DLP-Link
Light source
Light source
Light source	Laser (phosphor)	Laser (phosphor)
Emitter
Emitter	Blue laser + phosphor	Blue laser + phosphor
Light engine
Light engine	DuraCore	—
Light-source life
Light-source life	30,000 h	20,000 h normal · 30,000 h dynamic
Optics
Throw ratio
Throw ratio	0.5:1	0.49:1
Image size
Image size	36–292 in	40–300 in
Projection offset
Projection offset	116%	—
Zoom
Zoom	None	None
Focal length
Focal length	7.51 mm	—
Aperture (f-number)
Aperture (f-number)	2.8	—
Focus
Focus	—	Manual
Vertical lens shift
Vertical lens shift	None	None
Horizontal lens shift
Horizontal lens shift	None	None
Vertical keystone
Vertical keystone	30°	15°
Horizontal keystone
Horizontal keystone	30°	15°
Auto keystone
Auto keystone	—	Yes
Corner correction
Corner correction	—	4-corner
Interchangeable lens
Interchangeable lens	—	No
Motion & gaming
Input lag
Input lag	1080p: 60 Hz 33.8 ms · 120 Hz 17 ms	—
Inputs & control
HDMI inputs
HDMI inputs	2 × HDMI 2.0	HDMI (HDCP 2.2) · HDMI (HDCP 1.4)
Max input resolution
Max input resolution	—	4K UHD
Control ports
Control ports	RS-232	RS-232
PJLink
PJLink	Class 1	—
Control-system drivers
Control-system drivers	Crestron, AMX	Crestron
Horizontal scan
Horizontal scan	15–140 kHz	15–102 kHz
Vertical scan
Vertical scan	24–120 Hz	23–120 Hz
Smart platform
Ethernet
Ethernet	Yes	Yes
Audio
Speaker power
Speaker power	15 W	30 W
Speakers
Speakers	1	2
Layout
Layout	—	Stereo
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)	274 × 216 × 114 mm	337 × 265 × 132 mm
Weight
Weight	2,998 g	4,500 g
Orientations
Orientations	Portrait, 360°	Table, Ceiling, Rear, Portrait, 360°
Ceiling mount
Ceiling mount	M4, screws ≥ 10 mm	M4, screws ≤ 10 mm
Ingress protection
Ingress protection	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	2,500 m	3,658 m · high-altitude mode
Power draw
Power draw	Max 173 W · Eco 119 W	245 W
Standby
Standby	Up to 0.5 WPreliminary	Up to 0.5 W
Power supply
Power supply	External adapter	—
Mains input
Mains input	100–240 V · 50/60 Hz	100–240 V · 50/60 Hz
Fan noise
Fan noise	Max 36 dB(A)	—
Safety & support
Laser class
Laser class	Class 1	—
Risk group
Risk group	RG2	RG2
FDA laser notice
FDA laser notice	Notice 57	—
Marks
Marks	—	FCC
Warranty
Warranty	3 yr (light source 5 yr or 12,000 h)	3 yr (light source 1 yr)
User manual
User manual	https://region-resource.optoma.com/products/import/Documents/f141af2c-7d8e-4d73-952f-5a86d8e9c891.pdf	https://www.viewsonicglobal.com/public/products_download/user_guide/projector/LS751HD/LS710HD_LS751HD_UG_ENG.pdf
In the box
In the box
In the box	Power cord, Remote, Remote batteries, Quick start guide	Power cord, Remote, Remote batteries, Quick start guide
Remote
Remote	—	IR