InFocus IN1108SL vs Optoma ZK431ST

	InFocus IN1108SL	Optoma ZK431ST

Key differences
Native resolution
Native resolution	1080p (1920 × 1080)	—
Throw ratio
Throw ratio	1.48–1.62:1	0.5:1
Lowest input lag
Lowest input lag	—	8.6 msDerived
Fan noise
Fan noise	Normal 34 dB(A) · Eco 29 dB(A)	Normal 35 dB(A) · Eco 29 dB(A)
Room fit80″100″120″150″
Distance to screen
Distance to screen	3.3–3.6 m	1.1 m
Picture
Claimed brightness (non-standard)
Claimed brightness (non-standard)	4,300 lm	4,100 lm
Brightness uniformity
Brightness uniformity	80%	75%
Imaging technology
Imaging technology	DLP	DLP
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	—	2,000,000:1
Colour bit depth (per channel)
Colour bit depth (per channel)	10 bit	—
Gamma / EOTF presets
Gamma / EOTF presets	—	2.2, 2.4
3D
3D	Yes	Yes
3D formats
3D formats	—	Frame packing, Side-by-side, Top-bottom
3D glasses sync
3D glasses sync	—	DLP-Link
Light source
Light source
Light source	Laser (phosphor)	Laser (phosphor)
Light engine
Light engine	Quantum Laser	—
Light-source life
Light-source life	30,000 h max	30,000 h eco
Optics
Throw ratio
Throw ratio	1.48–1.62:1	0.5:1
Image size
Image size	—	30–300 in
Projection offset
Projection offset	116%	114%
Zoom
Zoom	Optical	None
Zoom ratio
Zoom ratio	1.09×Derived	—
Focal length
Focal length	21.86–24 mm	7.51 mm
Aperture (f-number)
Aperture (f-number)	2.5–2.67	2.8
Focus
Focus	Manual	Manual
Vertical lens shift
Vertical lens shift	None	—
Horizontal lens shift
Horizontal lens shift	None	—
Vertical keystone
Vertical keystone	30°	15°
Horizontal keystone
Horizontal keystone	30°	15°
Auto keystone
Auto keystone	Yes	—
Corner correction
Corner correction	—	4-corner
Grid warp
Grid warp	—	Yes
Motion & gaming
Input lag
Input lag	—	1080p: 60 Hz 16.7 ms · 120 Hz 8.6 ms · 4K UHD: 60 Hz 16.7 ms
Inputs & control
HDMI inputs
HDMI inputs	2 × HDMI 2.0	2 × HDMI 2.0
Max input resolution
Max input resolution	4K UHD	4K UHD
Control ports
Control ports	RS-232	RS-232, 12 V trigger
Horizontal scan
Horizontal scan	15–135 kHz	15–150 kHz
Vertical scan
Vertical scan	23–120 Hz	24–240 Hz
Smart platform
Ethernet
Ethernet	—	Yes
Audio
Speaker power
Speaker power	15 W	15 W
Speakers
Speakers	—	1
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)	278 × 216 × 115 mm	274 × 216 × 109 mm
Weight
Weight	2,800 g	2,900 g
Orientations
Orientations	Portrait, 360°	360°
Ceiling mount
Ceiling mount	—	M4, screws ≥ 10 mm
Dust filter
Dust filter	None	—
Ingress protection
Ingress protection	IP6X	—
Environment & power
Operating temperature
Operating temperature	0–40°C	0–40°C
Operating humidity
Operating humidity	10–80%RH	—
Altitude
Altitude	3,048 m	3,048 m
Power draw
Power draw	Max 170 W	Max 178 W · Eco 125 W
Standby
Standby	Up to 0.5 W	Up to 0.5 W
Power supply
Power supply	—	External adapter
Mains input
Mains input	—	100–240 V · 50/60 Hz
DC input
DC input	—	19.5 V
Fan noise
Fan noise	Normal 34 dB(A) · Eco 29 dB(A)	Normal 35 dB(A) · Eco 29 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	CE	FCC
Warranty
Warranty	—	5 yr
User manual
User manual	https://cdn.infocus.com/2026/07/IN1106SL_1108SL_1108ST_UG_EN_v1.pdf	—
In the box
In the box
In the box	Power cord, Power adapter, Remote, Quick start guide, HDMI cable, Lens cap	Power cord, Remote, Remote batteries, Quick start guide
Remote
Remote	IR	—