ProjectorDB

Optoma ZH451ST vs Optoma ZK451

Optoma ZK451 is $99.98 cheaper and brighter.

Optoma ZH451ST$1,698.98 · Amazon
Buy
Optoma ZK451$1,599 · Amazon
Buy
Key differences
White light outputISO
4,200 lm ISO4,500 lm ISO
Native resolution
1080p (1920 × 1080)—
Throw ratio
0.5:11.4–2.24:1
Lowest input lag
8.4 msDerived8.6 msDerived
Fan noise
Normal 36 dB(A) · Eco 29 dB(A)Max 35 dB(A) · Eco 29 dB(A)
Best price
$1,698.98$1,599
Room fit
Distance to screen
1.1 m3.1–5.0 m
Picture
White light outputISO
4,200 lm ISO4,500 lm ISO
Brightness uniformity
75%75%
Imaging technology
DLPDLP
Native resolution
1080p (1920 × 1080)—
Native aspect
16:9Derived16:9Derived
Addressable resolution
—4K UHD (3840 × 2160)
Dynamic contrast
2,000,000:12,000,000:1
Colour bit depth (per channel)
10 bit—
Gamma / EOTF presets
2.2, 2.42.2, 2.4
HDR formats
HDR10, HLGHDR10, HLG
Colour management (CMS)
6-axis6-axis
Picture certifications
ISF, Filmmaker Mode—
3D
YesYes
3D formats
Side-by-side, Top-bottom, Frame sequentialSide-by-side, Top-bottom, Frame sequential
3D glasses sync
DLP-LinkDLP-Link
Light source
Light source
Laser (phosphor)Laser (phosphor)
Emitter
Blue laser + phosphorBlue laser + phosphor
Light engine
DuraCore—
Light-source life
30,000 h30,000 h eco
Light output control
StepsSteps
Constant brightness mode
Yes—
Cool-down time
90 s90 s
Optics
Throw ratio
0.5:11.4–2.24:1
Image size
30–300 in30–300 in
Projection offset
116%116%
Zoom
DigitalOptical
Zoom ratio
—1.6×Derived
Focal length
7.51 mm20.91–32.62 mm
Aperture (f-number)
2.82.5–3.26
Focus
ManualManual
Autofocus
NoNo
Vertical keystone
15°30°
Horizontal keystone
15°30°
Corner correction
4-corner4-corner
Grid warp
—Yes
Auto setup
—Fit to screen, Obstacle avoidance
Motion & gaming
Input lag
About 1080p: 60 Hz 16.7 ms · 120 Hz 8.4 ms · 4K UHD: 60 Hz 16.7 ms1080p: 60 Hz 16.7 ms · 120 Hz 8.6 ms · 4K UHD: 60 Hz 16.7 ms
Inputs & control
HDMI inputs
2 × HDMI 2.02 × HDMI 2.0
Other video inputs
VGA—
Max input resolution
4K UHD4K UHD
Control ports
RS-232, Wired IR, 12 V triggerRS-232
PJLink
Class 1—
Control-system drivers
CrestronCrestron, AMX
Horizontal scan
15–135 kHz15–150 kHz
Vertical scan
24–120 Hz24–240 Hz
Smart platform
Ethernet
YesYes
Audio
Speaker power
15 W15 W
Speakers
11
Layout
Mono—
Audio outputs
—3.5 mm
HDMI audio return
—NoneDerived
Physical & installation
Dimensions (W × D × H)
274 × 216 × 114 mm274 × 216 × 114 mm
Weight
3,000 g2,900 g
Orientations
Portrait, 360°Table, Ceiling, Rear, Portrait, 360°
Ceiling mount
M4, 10 mm screwsM4, screws ≥ 10 mm
Dust filter
—None
Ingress protection
IP6XIP6X (light engine)
Sealed optical engine
—Yes
Environment & power
Operating temperature
0–40°C0–40°C
Altitude
2,500 m · high-altitude mode3,048 m
Power draw
Max 170 WMax 178 W · Eco 124 W
Standby
Up to 0.5 WUp to 0.5 W
Power supply
External adapterExternal adapter
Mains input
100–240 V · 50/60 Hz100–240 V · 50/60 Hz
Fan noise
Normal 36 dB(A) · Eco 29 dB(A)Max 35 dB(A) · Eco 29 dB(A)
Safety & support
Laser class
Class 1Class 1
Risk group
RG2RG2
Hazard distance
1 m—
FDA laser notice
—Notice 57
Marks
FCCFCC
Warranty
—3 yr (light source 5 yr or 12,000 h)
User manual
https://region-resource.optoma.com/products/documents/0NL94Q0vvVEJVe7dxQKlMzhtuURlT8FwUXNkLi8y.pdfhttps://region-resource.optoma.com/products/documents/LaU8Uwg9XFPmrLtSBvohDroL18wojvZr27JsfxCM.pdf
In the box
In the box
Power cord, Remote, Remote batteries, Quick start guidePower cord, Remote, Remote batteries, Quick start guide
Remote
IR—
Optoma ZH451ST$1,698.98 · Amazon
Buy
Optoma ZK451$1,599 · Amazon
Buy