Optoma ZK551

Brand	Optoma
Type	Installation
Released	August 2025
Resolution	4K UHD
Imaging technology	DLP
Light source type	Laser (phosphor)
ISO light output	5,100 lm
Throw ratio	1.4–2.24:1
Input lag (rated)	1920×1080 @ 60 Hz: 17 ms · 1920×1080 @ 120 Hz: 8.6 ms · 1920×1080 @ 240 Hz: 4.4 ms · 3840×2160 @ 60 Hz: 17 ms

A compact single-chip DLP laser projector rated at 5,100 ISO lumens with a 3840x2160 picture built by pixel shifting. It has a 1.6x manual zoom lens with vertical lens shift, two HDMI 2.0 inputs, RS232 and network control, and Miracast sharing through a Wi-Fi dongle. It suits classrooms, meeting rooms and simulation rooms.

Data sheet

Picture

Imaging technology	DLP
Number of imaging devices	1
Native aspect ratio	16:9
Pixel shift	XPR 4-way
Addressable resolution	3840 × 2160
Dynamic contrast	3,000,000:1
Gamma / EOTF presets	2.2, 2.4
Colour management system	6-axis
Max refresh rate	1920×1080: 240 Hz · 3840×2160: 60 Hz
Input lag (rated)	1920×1080 @ 60 Hz: 17 ms · 1920×1080 @ 120 Hz: 8.6 ms · 1920×1080 @ 240 Hz: 4.4 ms · 3840×2160 @ 60 Hz: 17 ms
3D support	Yes
3D sync method	DLP-Link
3D formats	Frame packing, Side-by-side, Top-bottom, Frame sequential

Optics

Throw ratio	1.4–2.24:1
Projection distance table	40″: 1.24–1.98 m · 60″: 1.86–2.98 m · 100″: 3.1–4.96 m · 145″: 4.49–7.19 m · 180″: 5.58–8.93 m
Zoom type	Optical
Zoom ratio	1.6×
Focus	Manual
Vertical lens shift	102–117%
Fixed offset	102%
Focal length	20.91–32.62 mm
F-number	2.5–3.26
Interchangeable lens	No
Image size range	20–300 in
Vertical keystone	-30–30°
Horizontal keystone	-30–30°
Corner / warp correction	Warp

Light source

Light source type	Laser (phosphor)
Light source detail	DuraCore laser
Light source life	Eco: 30,000 h
Constant brightness mode	Yes
Cool-down time	90 s
ISO light output	5,100 lm ISO 21118	ISO 21118
Brightness uniformity (centre-to-corner)	75%

Audio

Speaker power	15 W
Speaker count	1
Audio channels	Mono
Audio outputs	3.5 mm

Inputs, control & connectivity

Max input signal	3840 × 2160
HDMI port count	2
HDMI ports (feature-level)	HDMI 1: HDMI 2.0, HDCP 2.3; HDMI 2: HDMI 2.0, HDCP 2.3
Horizontal scan frequency	15–150 kHz
Vertical scan frequency	24–240 Hz
RS-232	Yes
LAN control	Yes
12 V trigger	Yes
PJLink class	Class 1
Control ecosystem drivers	Crestron
Ethernet	Yes

Firmware / software

Casting	Miracast
Update policy	Over-the-air (OTA) firmware updates

Environment & power

Operating temperature	0–40°C
Altitude / high-altitude mode	3,048 m
High-altitude mode	Yes
Operating orientations	Table, Ceiling, Rear, Portrait, 360°
Rated voltage	100–240 V
Rated frequency	50–60 Hz
Power consumption (max)	245 W
Power consumption by mode	Eco 110v: 170 W · Eco 220v: 168 W · Bright 110v: 245 W · Bright 220v: 240 W
Standby power	0.5 W
Power supply	External brickPreliminary
Fan noise (sound pressure)	Min: 28 dB(A) · Max: 34 dB(A)

Physical & installation

Width	274 mm
Depth	216 mm
Height	114 mm
Weight	3.5 kg
Ingress protection	IP6XPreliminary
Mount hole pattern	Screw: M4*10mm

Support & ownership

User manual	https://region-resource.optoma.com/products/documents/K5mU9Peeq4zSbamp55pR5XFag9nk3bx7MMN5DCWz.pdf
Photobiological risk group	RG2
Laser product class	Class 1 (consumer laser product), Risk Group 2
Safety & market certifications	FCC

In the box

Box contents	Power cord, Remote, Batteries, Quick start guide
Remote type	IR

Tools

Throw calculator — How far from the screen the ZK551 needs to sit for a given image size, set to its 1.4–2.24:1 lens.
Download spec as CSV — Every value on this data sheet with its unit and source, one row per spec.
Download spec as JSON — The same data from the open data API, with variants and identifiers.