BenQ TK705STi vs Optoma UHZ35ST

BenQ TK705STi is $400 cheaper, quieter and broader on HDR. Optoma UHZ35ST is lighter.

	BenQ TK705STi$1,799 · Amazon Buy	Optoma UHZ35ST$2,199 · Amazon Buy

Key differences
White light output
White light output	3,000 lm ANSI	3,500 lm ISO
Native resolution
Native resolution	—	1080p (1920 × 1080)
Throw ratio
Throw ratio	0.8:1	0.5:1
Lowest input lag
Lowest input lag	5 msDerived	4.4 msDerived
HDR formats
HDR formats	HDR10, HDR10+, HLG	HDR10, HLG
Light source
Light source	LED	Laser (phosphor)
Fan noise
Fan noise	Normal 28 dB(A) · Eco 24 dB(A)	Normal 35 dB(A) · Eco 28 dB(A)
MSRP
MSRP	$1,999	$3,299
Best price
Best price	$1,799	$2,199
Room fit80″100″120″150″
Distance to screen
Distance to screen	1.8 m	1.1 m
Picture
White light output
White light output	3,000 lm ANSI	3,500 lm ISO
Claimed brightness (non-standard)
Claimed brightness (non-standard)	—	3,500 lm
Brightness uniformity
Brightness uniformity	—	75%
Imaging technology
Imaging technology	DLP	DLP
Chip / panel diagonal
Chip / panel diagonal	0.47 in	0.65 in
Native resolution
Native resolution	—	1080p (1920 × 1080)
Native aspect
Native aspect	16:9Derived	16:9Derived
Pixel shift
Pixel shift	—	XPR 4-way
Addressable resolution
Addressable resolution	4K UHD (3840 × 2160)	4K UHD (3840 × 2160)
Dynamic contrast
Dynamic contrast	600,000:1	500,000:1
Colour gamut
Colour gamut	Rec. 709 98% coverage	—
Colour bit depth (per channel)
Colour bit depth (per channel)	10 bit	10 bit
Gamma / EOTF presets
Gamma / EOTF presets	—	2.2, 2.4
HDR formats
HDR formats	HDR10, HDR10+, HLG	HDR10, HLG
Colour management (CMS)
Colour management (CMS)	—	6-axis
Greyscale control points
Greyscale control points	11	—
3D
3D	—	Yes
3D formats
3D formats	—	Frame packing, Side-by-side, Top-bottom, Frame sequential
3D glasses sync
3D glasses sync	—	DLP-Link
Light source
Light source
Light source	LED	Laser (phosphor)
Emitter
Emitter	4-channel LED	Blue laser + phosphor
Light engine
Light engine	—	DuraCore
Light-source life
Light-source life	20,000 h normal · 30,000 h eco	30,000 h
Light output control
Light output control	Steps	Steps
Cool-down time
Cool-down time	—	90 s
Optics
Throw ratio
Throw ratio	0.8:1	0.5:1
Image size
Image size	30–300 in	36–300 in
Projection offset
Projection offset	100%	116%
Zoom
Zoom	Digital	None
Focal length
Focal length	8.5 mm	7.51 mm
Aperture (f-number)
Aperture (f-number)	1.8	2.8
Focus
Focus	Motorised	Manual
Autofocus
Autofocus	Yes	No
Autofocus runs
Autofocus runs	When moved	—
Vertical lens shift
Vertical lens shift	—	None
Horizontal lens shift
Horizontal lens shift	—	None
Vertical keystone
Vertical keystone	30°	15°
Horizontal keystone
Horizontal keystone	20°	15°
Auto keystone
Auto keystone	Yes	—
Grid warp
Grid warp	—	Yes
Auto setup
Auto setup	Fit to screen, Obstacle avoidance	—
Motion & gaming
Frame interpolation (MEMC)
Frame interpolation (MEMC)	Yes	—
Max input refresh
Max input refresh	—	1080p: 240 Hz · 4K UHD: 60 Hz
Input lag
Input lag	1080p: 60 Hz 5 ms · 4K UHD: 60 Hz 5 ms	1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 240 Hz 4.4 ms · 4K UHD: 60 Hz 16.9 ms
Gaming features
Gaming features	ALLM	—
Inputs & control
HDMI inputs
HDMI inputs	2 × HDMI 2.1 (HDCP 2.2)	HDMI 2.0 · HDMI 2.0 (eARC)
Other video inputs
Other video inputs	USB-C (DisplayPort)	—
Max input resolution
Max input resolution	4K UHD	DCI 4K
USB media playback
USB media playback	Yes	—
Control ports
Control ports	12 V trigger	RS-232
Control-system drivers
Control-system drivers	—	Crestron
Horizontal scan
Horizontal scan	15–102 kHz	15–140 kHz
Vertical scan
Vertical scan	23–120 Hz	24–240 Hz
Smart platform
Wi-Fi
Wi-Fi	Wi-Fi 6	None
Bluetooth
Bluetooth	5.2	—
Ethernet
Ethernet	—	Yes
Smart platform
Smart platform	Google TV	None
OS version
OS version	11	—
Netflix
Netflix	Built in	—
Casting
Casting	Chromecast built-in	—
Audio
Speaker power
Speaker power	16 W	15 W
Speakers
Speakers	2	1
Layout
Layout	—	Mono
Audio outputs
Audio outputs	3.5 mm, HDMI eARC, Bluetooth	3.5 mm, HDMI eARC
HDMI audio return
HDMI audio return	eARCDerived	eARCDerived
Bluetooth speaker mode
Bluetooth speaker mode	Yes	—
Physical & installation
Dimensions (W × D × H)
Dimensions (W × D × H)	229 × 250 × 168 mm	274 × 216 × 114 mm
Weight
Weight	3,800 g	3,000 g
Colours
Colours	—	White
Orientations
Orientations	Table, Ceiling, Rear, Limited tilt	Portrait, 360°
Ceiling mount
Ceiling mount	M4	M4, 10 mm screws
Tripod socket
Tripod socket	Yes	—
Ingress protection
Ingress protection	—	IP6X
Environment & power
Operating temperature
Operating temperature	0–40°C	0–40°C
Operating humidity
Operating humidity	10–90%RH	—
Altitude
Altitude	2,000 m · high-altitude mode	762 m · high-altitude mode
Power draw
Power draw	Max 250 W	Max 185 W · Normal 185 W · Eco 126 W
Standby
Standby	Up to 0.5 W	Up to 0.5 W
Networked standby
Networked standby	Up to 2 W	Up to 2 W
Power supply
Power supply	External adapter	External adapter
Mains input
Mains input	100–240 V · 50/60 Hz	100–240 V · 50/60 Hz
USB-C PD out
USB-C PD out	30 W	—
Fan noise
Fan noise	Normal 28 dB(A) · Eco 24 dB(A)	Normal 35 dB(A) · Eco 28 dB(A)
Safety & support
Laser class
Laser class	—	Class 1
Risk group
Risk group	—	RG2
Eye-protection sensor
Eye-protection sensor	Yes	—
Marks
Marks	—	FCC
Warranty
Warranty	3 yr	1 yr (light source 5 yr or 12,000 h)
User manual
User manual	https://esupportdownload.benq.com/esupport/PROJECTOR%20FOR%20CONSUMER/UserManual/TK705STi/TK705STi_UM_EN_260316112414.pdf	https://region-resource.optoma.com/products/documents/fafrOEdwat8KymDO94ZUVxn0eamb2y1Mrnyffkol.pdf
Firmware
Firmware	—	UHZ35ST_C12_FW_OneClick
In the box
In the box
In the box	Power cord, Power adapter, Remote, User manual	Power cord, Remote, Remote batteries, Quick start guide
Remote
Remote	Voice	IR

BenQ TK705STi$1,799 · Amazon

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Optoma UHZ35ST$2,199 · Amazon

Buy