Epson BrightLink 1485Fi vs ViewSonic LS831WU

ViewSonic LS831WU is $1,068 cheaper and sharper.

	Epson BrightLink 1485FiMSRP $3,568	ViewSonic LS831WUMSRP $2,500

Key differences
White light output
White light output	5,000 lm ISO	4,500 lm ANSI
Native resolution
Native resolution	1366 × 768	WUXGA (1920 × 1200)
Throw ratio
Throw ratio	0.27–0.37:1	0.25:1
Fan noise
Fan noise	Normal 36 dB(A) · Eco 27 dB(A)	—
MSRP
MSRP	$3,568	$2,500
Room fit80″100″120″150″
Distance to screen
Distance to screen	0.60–0.82 m	0.54 m
Picture
White light output
White light output	5,000 lm ISO	4,500 lm ANSI
Colour light output
Colour light output	5,000 lm	—
Imaging technology
Imaging technology	3LCD	DLP
Native resolution
Native resolution	1366 × 768	WUXGA (1920 × 1200)
Native aspect
Native aspect	16:9Derived	16:10Derived
Pixel shift
Pixel shift	Yes (scheme not stated)	—
Dynamic contrast
Dynamic contrast	Up to 2,500,000:1	3,000,000:1
Picture mode memories
Picture mode memories	—	2
3D
3D	—	Yes
3D formats
3D formats	—	Frame packing, Side-by-side, Top-bottom, Frame sequential
Light source
Light source
Light source	Laser (phosphor)	Laser (phosphor)
Emitter
Emitter	Blue laser + phosphor	Blue laser + phosphor
Light-source life
Light-source life	20,000 h normal · 30,000 h eco	20,000 h
Life defined as
Life defined as	50% brightness	—
Optics
Throw ratio
Throw ratio	0.27–0.37:1	0.25:1
Image size
Image size	65–100 in	70–200 in
Zoom
Zoom	Digital	None
Focal length
Focal length	3.9 mm	—
Aperture (f-number)
Aperture (f-number)	1.5	—
Focus
Focus	Manual	Manual
Vertical lens shift
Vertical lens shift	—	None
Horizontal lens shift
Horizontal lens shift	—	None
Vertical keystone
Vertical keystone	3°	5°
Horizontal keystone
Horizontal keystone	3°	5°
Corner correction
Corner correction	—	4-corner
Interchangeable lens
Interchangeable lens	—	No
Inputs & control
HDMI inputs
HDMI inputs	3 × HDMI 1.4	2 × HDMI 2.0 (HDCP 2.2)
Other video inputs
Other video inputs	VGA, Composite, HDBaseT	VGA, Composite, HDBaseT
Max input resolution
Max input resolution	—	4K UHD
Audio inputs
Audio inputs	3.5 mm, Microphone	3.5 mm, RCA
Control ports
Control ports	RS-232	RS-232, 12 V trigger
Control-system drivers
Control-system drivers	—	Crestron, AMX
Horizontal scan
Horizontal scan	—	15–102 kHz
Vertical scan
Vertical scan	—	23–120 Hz
Smart platform
Wi-Fi
Wi-Fi	Wi-Fi 5	—
Ethernet
Ethernet	Yes	Yes
Casting
Casting	Miracast	—
Audio
Speaker power
Speaker power	16 W	20 W
Speakers
Speakers	2	2
Layout
Layout	Stereo	Stereo
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)	460 × 363 × 211 mm	492 × 387 × 157 mm
Weight
Weight	9,700 g	9,900 g
Orientations
Orientations	Table, Ceiling	Table, Ceiling, Rear
Ceiling mount
Ceiling mount	—	M4, 12.8–15.8 mm screws
Environment & power
Operating temperature
Operating temperature	0–40°C	0–40°C
Operating humidity
Operating humidity	—	10–90%RH
Altitude
Altitude	—	3,000 m · high-altitude mode
Power draw
Power draw	Normal 381 W · Eco 270 W	504 W
Standby
Standby	0.5 W	Up to 0.5 W
Networked standby
Networked standby	2 W	—
Mains input
Mains input	100–240 V · 50/60 Hz	100–240 V · 50/60 Hz
Fan noise
Fan noise	Normal 36 dB(A) · Eco 27 dB(A)	—
Safety & support
Laser class
Laser class	Class 1	Class 1
Risk group
Risk group	RG2	—
Marks
Marks	—	FCC
Warranty
Warranty	2 yr	3 yr
User manual
User manual	—	https://www.viewsonicglobal.com/public/products_download/user_guide/Projector/LS831WU/LS831WU_UG_ENG.pdf
Spare parts
Spare parts	Air filter V13H134A56 · Mount V12HA06A05	—
In the box
In the box
In the box	Remote, Remote batteries, Quick start guide, Warranty card, USB cable	Power cord, Remote, Quick start guide, VGA cable
Remote
Remote	—	IR