Optoma ZH451 vs ViewSonic LS710HD

Optoma ZH451 is lighter.

	Optoma ZH451	ViewSonic LS710HD

Key differences
White light output
White light output	4,600 lm ISO	4,200 lm ANSI
Throw ratio
Throw ratio	1.4–2.24:1	0.49:1
Lowest input lag
Lowest input lag	8.6 msDerived	—
Fan noise
Fan noise	Max 31 dB(A) · Eco 29 dB(A)	—
Room fit80″100″120″150″
Distance to screen
Distance to screen	3.1–5.0 m	1.1 m
Picture
White light output
White light output	4,600 lm ISO	4,200 lm ANSI
Brightness uniformity
Brightness uniformity	75%	—
Imaging technology
Imaging technology	DLP	DLP
Native resolution
Native resolution	1080p (1920 × 1080)	1080p (1920 × 1080)
Native aspect
Native aspect	16:9Derived	16:9Derived
Dynamic contrast
Dynamic contrast	3,000,000:1	3,000,000:1
Colour bit depth (per channel)
Colour bit depth (per channel)	10 bit	10 bit
3D
3D	Yes	Yes
3D formats
3D formats	Frame packing, Side-by-side, Top-bottom	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
Light-source life
Light-source life	30,000 h	20,000 h normal · 30,000 h dynamic
Light output control
Light output control	Steps	—
Optics
Throw ratio
Throw ratio	1.4–2.24:1	0.49:1
Image size
Image size	30–300 in	40–300 in
Projection offset
Projection offset	116%	—
Zoom
Zoom	Optical	None
Zoom ratio
Zoom ratio	1.6×Derived	—
Focal length
Focal length	20.91–32.62 mm	—
Aperture (f-number)
Aperture (f-number)	2.5–3.26	—
Focus
Focus	Manual	Manual
Autofocus
Autofocus	No	—
Vertical lens shift
Vertical lens shift	—	None
Horizontal lens shift
Horizontal lens shift	—	None
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
Interchangeable lens
Interchangeable lens	—	No
Motion & gaming
Input lag
Input lag	1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 4K UHD: 60 Hz 16.9 ms	—
Inputs & control
HDMI inputs
HDMI inputs	2 × HDMI 2.0	HDMI (HDCP 2.2) · HDMI (HDCP 1.4)
Other video inputs
Other video inputs	VGA	—
Max input resolution
Max input resolution	4K UHD	4K UHD
Audio inputs
Audio inputs	3.5 mm	—
Control ports
Control ports	RS-232, 12 V trigger	RS-232
PJLink
PJLink	Class 2	—
Control-system drivers
Control-system drivers	Crestron, AMX	Crestron
Horizontal scan
Horizontal scan	15–135 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	Mono	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	Table, Ceiling, Rear, 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	0–80%RH	10–80%RH
Altitude
Altitude	2,500 m · high-altitude mode	3,658 m · high-altitude mode
Power draw
Power draw	Max 170 W · Eco 120 W	245 W
Standby
Standby	Up to 0.5 W	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 31 dB(A) · Eco 29 dB(A)	—
Safety & support
Laser class
Laser class	Class 1	—
Risk group
Risk group	RG2	RG2
Marks
Marks	FCC	FCC
Warranty
Warranty	—	3 yr (light source 1 yr)
User manual
User manual	https://region-resource.optoma.com/products/documents/mpTwkm9mUWvfsgMhppFmV04EqeoeeRYWmvKy7tBF.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, User manual	Power cord, Remote, Remote batteries, Quick start guide
Remote
Remote	—	IR