Optoma ZH420 vs Optoma ZH451

Optoma ZH420 is in stock.

	Optoma ZH420$1,369 · Amazon Buy	Optoma ZH451

Key differences
White light output
White light output	—	4,600 lm ISO
Throw ratio
Throw ratio	1.12–1.47:1	1.4–2.24:1
HDR formats
HDR formats	HDR10, HLG	—
Fan noise
Fan noise	Max 31 dB(A) · Normal 29 dB(A)	Max 31 dB(A) · Eco 29 dB(A)
MSRP
MSRP	$1,799	—
Best price
Best price	$1,369	—
Room fit80″100″120″150″
Distance to screen
Distance to screen	2.5–3.3 m	3.1–5.0 m
Picture
White light output
White light output	—	4,600 lm ISO
Claimed brightness (non-standard)
Claimed brightness (non-standard)	4,300 lm	—
Brightness uniformity
Brightness uniformity	75%	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
Gamma / EOTF presets
Gamma / EOTF presets	2.2, 2.4	—
HDR formats
HDR formats	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)
Light-source life
Light-source life	Up to 30,000 h max	30,000 h
Light output control
Light output control	Steps	Steps
Cool-down time
Cool-down time	90 s	—
Optics
Throw ratio
Throw ratio	1.12–1.47:1	1.4–2.24:1
Image size
Image size	31–322 in	30–300 in
Projection offset
Projection offset	116%	116%
Zoom
Zoom	Optical	Optical
Zoom ratio
Zoom ratio	1.31×Derived	1.6×Derived
Focal length
Focal length	16.9–21.61 mm	20.91–32.62 mm
Aperture (f-number)
Aperture (f-number)	2.43–2.78	2.5–3.26
Focus
Focus	Manual	Manual
Autofocus
Autofocus	No	No
Vertical lens shift
Vertical lens shift	None	—
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
Max input refresh
Max input refresh	1080p: 120 Hz	—
Input lag
Input lag	1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 4K UHD: 60 Hz 17 ms	1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 4K UHD: 60 Hz 16.9 ms
Inputs & control
HDMI inputs
HDMI inputs	HDMI 2.0 · HDMI 2.0 (HDCP 2.2)	2 × HDMI 2.0
Other video inputs
Other video inputs	—	VGA
Max input resolution
Max input resolution	DCI 4K	4K UHD
Audio inputs
Audio inputs	—	3.5 mm
Control ports
Control ports	RS-232	RS-232, 12 V trigger
PJLink
PJLink	—	Class 2
Control-system drivers
Control-system drivers	Crestron, AMX	Crestron, AMX
Horizontal scan
Horizontal scan	15–140 kHz	15–135 kHz
Vertical scan
Vertical scan	24–120 Hz	24–120 Hz
Smart platform
Ethernet
Ethernet	Yes	Yes
Audio
Speaker power
Speaker power	15 W	15 W
Speakers
Speakers	1	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	274 × 216 × 114 mm
Weight
Weight	3,000 g	2,998 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	IP6X
Environment & power
Operating temperature
Operating temperature	0–40°C	0–40°C
Operating humidity
Operating humidity	—	0–80%RH
Altitude
Altitude	2,500 m · high-altitude mode	2,500 m · high-altitude mode
Power draw
Power draw	Max 173 W · Eco 119 W	Max 170 W · Eco 120 W
Standby
Standby	Up to 0.5 W	Up to 0.5 W
Power supply
Power supply	External adapter	External adapter
Mains input
Mains input	100–240 V · 50/60 Hz	100–240 V · 50/60 Hz
DC input
DC input	19 V	—
Fan noise
Fan noise	Max 31 dB(A) · Normal 29 dB(A)	Max 31 dB(A) · Eco 29 dB(A)
Safety & support
Laser class
Laser class	Class 1	Class 1
Risk group
Risk group	RG2	RG2
FDA laser notice
FDA laser notice	Notice 57	—
Marks
Marks	FCC	FCC
Warranty
Warranty	3 yr (light source 5 yr or 12,000 h)	—
User manual
User manual	https://region-resource.optoma.com/products/import/Documents/02387d20-4b12-4d04-97e4-be316b803cf2.pdf	https://region-resource.optoma.com/products/documents/mpTwkm9mUWvfsgMhppFmV04EqeoeeRYWmvKy7tBF.pdf
In the box
In the box
In the box	Power cord, Remote, Remote batteries, Quick start guide	Power cord, Remote, Remote batteries, User manual

Optoma ZH420$1,369 · Amazon

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Optoma ZH451