Optoma ZH551 vs ViewSonic LSD400HD-ST

Optoma ZH551 is lighter. ViewSonic LSD400HD-ST is $417 cheaper and broader on HDR.

	Optoma ZH551$1,499 · Amazon Buy	ViewSonic LSD400HD-ST$1,082 · Amazon Buy

Key differences
White light output
White light output	5,600 lm ISO	4,000 lm ANSI
Throw ratio
Throw ratio	1.4–2.24:1	0.49–0.5:1
Lowest input lag
Lowest input lag	8.6 msDerived	—
HDR formats
HDR formats	HLG	HDR10, HLG
Fan noise
Fan noise	Normal 33 dB(A) · Eco 28 dB(A)	Normal 32 dB(A) · Eco 27 dB(A)
MSRP
MSRP	—	$1,099.99
Best price
Best price	$1,499	$1,082
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	5,600 lm ISO	4,000 lm ANSI
Claimed brightness (non-standard)
Claimed brightness (non-standard)	—	4,800 lm
Brightness uniformity
Brightness uniformity	75%	—
Imaging technology
Imaging technology	DLP	DLP
Chip / panel diagonal
Chip / panel diagonal	0.65 in	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	3,000,000:1	3,000,000:1
Colour bit depth (per channel)
Colour bit depth (per channel)	—	10 bit
HDR formats
HDR formats	HLG	HDR10, HLG
Colour management (CMS)
Colour management (CMS)	6-axis	—
3D
3D	Yes	Yes
3D formats
3D formats	Frame packing, Side-by-side, Top-bottom, Frame sequential	Frame packing, Side-by-side, Top-bottom
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 eco	20,000 h normal · 30,000 h eco
Cool-down time
Cool-down time	90 s	—
Optics
Throw ratio
Throw ratio	1.4–2.24:1	0.49–0.5:1
Image size
Image size	28–145 in	40–300 in
Projection offset
Projection offset	103%	132%
Zoom
Zoom	Optical	None
Zoom ratio
Zoom ratio	1.6×Derived	—
Focal length
Focal length	20.91–32.62 mm	7.51 mm
Aperture (f-number)
Aperture (f-number)	2.5–3.26	2.8
Focus
Focus	Manual	Manual
Autofocus
Autofocus	No	No
Vertical lens shift
Vertical lens shift	0–15%	—
Motorised lens shift
Motorised lens shift	No	—
Vertical keystone
Vertical keystone	30°	15°
Horizontal keystone
Horizontal keystone	30°	15°
Corner correction
Corner correction	4-corner	4-corner
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	2 × HDMI 2.0 (HDCP 2.2)
Other video inputs
Other video inputs	VGA	—
Max input resolution
Max input resolution	4K UHD	4K UHD
Control ports
Control ports	RS-232, 12 V trigger	RS-232
PJLink
PJLink	Class 1	—
Control-system drivers
Control-system drivers	Crestron	Crestron
Horizontal scan
Horizontal scan	15.38–135 kHz	15–135 kHz
Vertical scan
Vertical scan	23.97–120 Hz	24–120 Hz
Smart platform
Ethernet
Ethernet	Yes	Yes
Casting
Casting	Miracast	—
Audio
Speaker power
Speaker power	15 W	15 W
Speakers
Speakers	—	1
Layout
Layout	Mono	—
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	286 × 216 × 129 mm
Weight
Weight	2,900 g	3,100 g
Orientations
Orientations	Portrait, 360°	Table, Ceiling, Rear, Portrait, 360°
Dust filter
Dust filter	—	None
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	3,048 m · high-altitude mode	3,658 m · high-altitude mode
Power draw
Power draw	Normal 230 W · Eco 200 W	143 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	Normal 33 dB(A) · Eco 28 dB(A)	Normal 32 dB(A) · Eco 27 dB(A)
Safety & support
Laser class
Laser class	Class 1	Class 1
Risk group
Risk group	RG2	RG2
Hazard distance
Hazard distance	1 m	—
Marks
Marks	FCC	CE, FCC
Warranty
Warranty	3 yr (light source 5 yr or 12,000 h)	3 yr
User manual
User manual	https://region-resource.optoma.com/products/documents/sj3ba9jjcgNo3jqZNW4eSSqXsUgO3XnIzHgAsT4w.pdf	https://www.viewsonicglobal.com/public/products_download/user_guide/projector/LSD400HD-ST/LSD400HD-ST_UG_ENG.pdf
In the box
In the box
In the box	Power cord, Remote, Remote batteries, Quick start guide, Wi-Fi dongle	Power cord, Power adapter, Remote, Remote batteries, Quick start guide
Remote
Remote	IR	IR

Optoma ZH551$1,499 · Amazon

Buy

ViewSonic LSD400HD-ST$1,082 · Amazon

Buy