ProjectorDB

BenQ LK830ST vs ViewSonic LS740-4K

BenQ LK830ST is quieter, broader on HDR and in stock. ViewSonic LS740-4K is $799.01 cheaper, brighter and sharper.

BenQ LK830ST$2,599 · Amazon
Buy
ViewSonic LS740-4K$1,799.99 · Amazon
Buy
Key differences
White light outputANSI
4,000 lm ANSI5,000 lm ANSI
Native resolution
1080p (1920 × 1080)4K UHD (3840 × 2160)
Throw ratio
0.5:11.4–2.24:1
Lowest input lag
4.2 msDerived—
HDR formats
HDR10, HLGHLG
Fan noise
Normal 30 dB(A) · Eco 24 dB(A)Normal 32 dB(A) · Eco 27 dB(A)
MSRP
$2,499$1,799.99
Best price
$2,599$1,799.99
Room fit
Distance to screen
1.1 m3.1–5.0 m
Picture
White light outputANSI
4,000 lm ANSI5,000 lm ANSI
Imaging technology
DLPDLP
Chip / panel diagonal
0.65 in0.65 in
Native resolution
1080p (1920 × 1080)4K UHD (3840 × 2160)
Native aspect
16:9Derived16:9Derived
Pixel shift
XPR 4-way—
Addressable resolution
4K UHD (3840 × 2160)—
Dynamic contrast
3,000,000:13,000,000:1
Colour gamut
Rec. 709 93% coverage—
Colour bit depth (per channel)
10 bit10 bit
Gamma / EOTF presets
2.2, 2.4, 2.6—
HDR formats
HDR10, HLGHLG
Tone mapping
Adjustable—
Colour management (CMS)
6-axis—
Picture mode memories
2—
3D
YesYes
3D formats
Frame packing, Side-by-side, Top-bottom, Frame sequentialFrame packing, Side-by-side, Top-bottom, Frame sequential
3D glasses sync
—DLP-Link
Light source
Light source
Laser (phosphor)Laser (phosphor)
Emitter
—Blue laser + phosphor
Light-source life
20,000 h normal · 30,000 h eco20,000 h normal · 30,000 h super eco
Light output control
Continuous—
Optics
Throw ratio
0.5:11.4–2.24:1
Image size
70–300 in30–300 in
Projection offset
114%124%
Zoom
DigitalOptical
Zoom ratio
—1.6×Derived
Focal length
17.51 mm—
Aperture (f-number)
2.8—
Focus
ManualManual
Autofocus
—No
Vertical lens shift
None—
Horizontal lens shift
None—
Vertical keystone
30°30°
Horizontal keystone
30°30°
Auto keystone
Yes—
Corner correction
4-corner—
Grid warp
YesYes
Interchangeable lens
No—
Motion & gaming
Max input refresh
1080p: 120 Hz · 240 Hz · 4K UHD: 60 Hz1080p: 240 Hz · 2560 × 1440: 120 Hz · 4K UHD: 60 Hz
Input lag
1080p: 60 Hz 16.7 ms · 120 Hz 8.3 ms · 240 Hz 4.2 ms · 4K UHD: 60 Hz 16.7 ms—
Inputs & control
HDMI inputs
2 × HDMI 2.0 (HDCP 2.2)2 × HDMI 2.0 (HDCP 2.3)
Max input resolution
4K UHD4K UHD
Control ports
RS-232RS-232
Control-system drivers
AMX—
Horizontal scan
15–135 kHz15–135 kHz
Vertical scan
23–240 Hz24–240 Hz
Smart platform
Wi-Fi
None—
Ethernet
YesYes
Audio
Speaker power
15 W15 W
Speakers
11
Layout
Mono—
Audio outputs
3.5 mm3.5 mm
HDMI audio return
NoneDerivedNoneDerived
Physical & installation
Dimensions (W × D × H)
279 × 229 × 121 mm286 × 216 × 129 mm
Weight
3,600 g3,100 g
Colours
Black—
Orientations
Ceiling, RearTable, Ceiling, Portrait, 360°
Ceiling mount
M4—
Dust filter
—None
Ingress protection
IP6X (light engine)IP6X
Sealed optical engine
YesYes
Environment & power
Operating temperature
0–40°C0–40°C
Operating humidity
10–80%RH10–80%RH
Altitude
3,000 m · high-altitude mode3,658 m · high-altitude mode
Power draw
Max 250 W · Normal 230 W · Eco 130 W165 W
Standby
Up to 0.5 WUp to 0.5 W
Networked standby
Up to 2 W—
Power supply
External adapterExternal adapter
Mains input
100–240 V · 50/60 Hz100–240 V · 50/60 Hz
DC input
24 V—
Fan noise
Normal 30 dB(A) · Eco 24 dB(A)Normal 32 dB(A) · Eco 27 dB(A)
Safety & support
Laser class
Class 1Class 1
Risk group
RG2RG2
Hazard distance
—1 m
Marks
—CE, FCC
Warranty
3 yr3 yr
User manual
https://www.audiogeneral.com/BenQ/LK830ST/LK830ST_LH830ST_LW830ST_User_Manual.pdfhttps://www.viewsonicglobal.com/public/products_download/user_guide/projector/LSD500-4K/LSD500-4K_LS740-4K_UG_ENG.pdf
In the box
In the box
Power cord, Power adapter, Remote, Remote batteries, Quick start guide, Warranty cardPower cord, Power adapter, Remote, Remote batteries, Quick start guide
Remote
BacklitIR
BenQ LK830ST$2,599 · Amazon
Buy
ViewSonic LS740-4K$1,799.99 · Amazon
Buy