ProjectorDB

Optoma ZK551 vs ViewSonic LS901-4K

Optoma ZK551 is lighter. ViewSonic LS901-4K is quieter.

Optoma ZK551$1,899 · Amazon
Buy
ViewSonic LS901-4K$1,945 · Amazon
Buy
Key differences
White light output
5,100 lm ISO5,500 lm ANSI
Throw ratio
1.4–2.24:11.2–2.04:1
Lowest input lag
4.4 msDerived—
HDR formats
—HDR10, HLG
Fan noise
Normal 34 dB(A) · Eco 28 dB(A)Normal 31 dB(A) · Eco 25 dB(A)
MSRP
—$3,699
Best price
$1,899$1,945
Room fit
Distance to screen
3.1–5.0 m2.7–4.5 m
Picture
White light output
5,100 lm ISO5,500 lm ANSI
Claimed brightness (non-standard)
—6,000 lm
Brightness uniformity
75%—
Imaging technology
DLPDLP
Chip / panel diagonal
—0.65 in
Native aspect
16:9Derived16:9Derived
Pixel shift
XPR 4-way—
Addressable resolution
4K UHD (3840 × 2160)4K UHD (3840 × 2160)
Dynamic contrast
3,000,000:13,000,000:1
Dynamic contrast method
—Light-source dimming
Colour bit depth (per channel)
—10 bit
Gamma / EOTF presets
2.2, 2.4—
HDR formats
—HDR10, HLG
Colour management (CMS)
6-axis—
3D
YesYes
3D formats
Frame packing, 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 + phosphor—
Light engine
DuraCore—
Light-source life
30,000 h eco20,000 h normal · 30,000 h super eco
Constant brightness mode
Yes—
Cool-down time
90 s—
Optics
Throw ratio
1.4–2.24:11.2–2.04:1
Image size
20–300 in30–300 in
Projection offset
102%154%
Zoom
OpticalOptical
Zoom ratio
1.6×Derived1.7×Derived
Focal length
20.91–32.62 mm17.63–27.9 mm
Aperture (f-number)
2.5–3.262.3–3
Focus
ManualManual
Autofocus
NoNo
Vertical lens shift
0–15.1%-21–0%
Vertical keystone
30°30°
Horizontal keystone
30°30°
Grid warp
YesYes
Interchangeable lens
No—
Motion & gaming
Max input refresh
1080p: 240 Hz · 4K UHD: 60 Hz1080p: 240 Hz · 2560 × 1440: 120 Hz · 4K UHD: 60 Hz
Input lag
1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 240 Hz 4.4 ms · 4K UHD: 60 Hz 17 ms—
Inputs & control
HDMI inputs
2 × HDMI 2.0 (HDCP 2.3)2 × HDMI 2.0 (HDCP 2.3)
Max input resolution
4K UHD4K UHD
USB media playback
—No
Control ports
RS-232, 12 V triggerRS-232
PJLink
Class 1—
Control-system drivers
CrestronCrestron
Horizontal scan
15–150 kHz15–255 kHz
Vertical scan
24–240 Hz23–240 Hz
Smart platform
Ethernet
YesYes
Casting
Miracast—
Audio
Speaker power
15 W30 W
Speakers
12
Layout
Mono—
Audio outputs
3.5 mm3.5 mm
HDMI audio return
NoneDerivedNoneDerived
Physical & installation
Dimensions (W × D × H)
274 × 216 × 114 mm337 × 280 × 132 mm
Weight
3,500 g4,850 g
Colours
—White
Orientations
Table, Ceiling, Rear, Portrait, 360°Table, Ceiling, Rear
Ceiling mount
M4, 10 mm screws—
Dust filter
—None
Ingress protection
IP6XPreliminary—
Sealed optical engine
—Yes
Environment & power
Operating temperature
0–40°C0–40°C
Operating humidity
—10–80%RH
Altitude
3,048 m · high-altitude mode3,658 m · high-altitude mode
Power draw
Max 245 W · Normal 245 W · Eco 170 W245 W
Standby
Up to 0.5 WUp to 0.5 W
Power supply
External adapterPreliminary—
Mains input
100–240 V · 50/60 Hz100–240 V · 50/60 Hz
Fan noise
Normal 34 dB(A) · Eco 28 dB(A)Normal 31 dB(A) · Eco 25 dB(A)
Safety & support
Laser class
Class 1Class 1
Risk group
RG2RG2
Hazard distance
—1 m
Marks
FCCCE, FCC
Warranty
—3 yr
User manual
https://region-resource.optoma.com/products/documents/K5mU9Peeq4zSbamp55pR5XFag9nk3bx7MMN5DCWz.pdfhttps://www.viewsonicglobal.com/public/products_download/user_guide/projector/LS901HD_LS901-4K/LS901HD_LS901-4K_UG_ENG.pdf
In the box
In the box
Power cord, Remote, Remote batteries, Quick start guidePower cord, Remote, Remote batteries, Quick start guide
Remote
IRIR
Optoma ZK551$1,899 · Amazon
Buy
ViewSonic LS901-4K$1,945 · Amazon
Buy