Optoma ZH551 vs Optoma ZK608T

Optoma ZH551 is lighter and in stock. Optoma ZK608T is brighter, better for gaming and broader on HDR.

	Optoma ZH551$1,499 · Amazon Buy	Optoma ZK608T

Key differences
White light outputISO
White light outputISO	5,600 lm ISO	6,000 lm ISO
Native resolution
Native resolution	1080p (1920 × 1080)	—
Throw ratio
Throw ratio	1.4–2.24:1	1.2–1.92:1
Lowest input lag
Lowest input lag	8.6 msDerived	4.36 msDerived
HDR formats
HDR formats	HLG	HDR10, HLG
Fan noise
Fan noise	Normal 33 dB(A) · Eco 28 dB(A)	Max 36 dB(A) · Eco 33 dB(A)
Best price
Best price	$1,499	—
Room fit80″100″120″150″
Distance to screen
Distance to screen	3.1–5.0 m	2.7–4.3 m
Picture
White light outputISO
White light outputISO	5,600 lm ISO	6,000 lm ISO
Brightness uniformity
Brightness uniformity	75%	85%
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	300,000:1
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	—
3D glasses sync
3D glasses sync	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	30,000 h eco
Cool-down time
Cool-down time	90 s	—
Optics
Throw ratio
Throw ratio	1.4–2.24:1	1.2–1.92:1
Image size
Image size	28–145 in	30–300 in
Projection offset
Projection offset	103%	106%
Zoom
Zoom	Optical	Optical
Zoom ratio
Zoom ratio	1.6×Derived	1.6×Derived
Focal length
Focal length	20.91–32.62 mm	17.63–27.9 mm
Aperture (f-number)
Aperture (f-number)	2.5–3.26	—
Focus
Focus	Manual	—
Autofocus
Autofocus	No	—
Vertical lens shift
Vertical lens shift	0–15%	-106–126%
Horizontal lens shift
Horizontal lens shift	—	±10%
Motorised lens shift
Motorised lens shift	No	No
Vertical keystone
Vertical keystone	30°	30°
Horizontal keystone
Horizontal keystone	30°	30°
Auto keystone
Auto keystone	—	Yes
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	1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 240 Hz 4.4 ms · 4K UHD: 60 Hz 16.9 ms
Inputs & control
HDMI inputs
HDMI inputs	2 × HDMI 2.0	2 × HDMI 2.0 (HDCP 2.3)
Other video inputs
Other video inputs	VGA	VGA, HDBaseT
Max input resolution
Max input resolution	4K UHD	—
Audio inputs
Audio inputs	—	3.5 mm
Control ports
Control ports	RS-232, 12 V trigger	RS-232, 12 V trigger
PJLink
PJLink	Class 1	—
Control-system drivers
Control-system drivers	Crestron	Crestron, AMX
Horizontal scan
Horizontal scan	15.38–135 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	—	2
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	374 × 302 × 117 mm
Weight
Weight	2,900 g	6,300 g
Orientations
Orientations	Portrait, 360°	Table, Ceiling, Rear, Portrait, 360°
Dust filter
Dust filter	—	None
Ingress protection
Ingress protection	IP6X (light engine)	IP6X (light engine)
Sealed optical engine
Sealed optical engine	—	Yes
Environment & power
Operating temperature
Operating temperature	0–40°C	—
Altitude
Altitude	3,048 m · high-altitude mode	—
Power draw
Power draw	Normal 230 W · Eco 200 W	Max 366 W · Normal 300 W
Standby
Standby	Up to 0.5 W	—
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)	Max 36 dB(A) · Eco 33 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 (light source 5 yr or 12,000 h)	—
User manual
User manual	https://region-resource.optoma.com/products/documents/sj3ba9jjcgNo3jqZNW4eSSqXsUgO3XnIzHgAsT4w.pdf	https://region-resource.optoma.com/products/import/Documents/b0d04fc7-f84c-44a5-b36c-e8109cc85fa3.pdf
In the box
In the box
In the box	Power cord, Remote, Remote batteries, Quick start guide, Wi-Fi dongle	Power cord, Remote, Remote batteries, Quick start guide
Remote
Remote	IR	—

Optoma ZH551$1,499 · Amazon

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Optoma ZK608T