BenQ TK705STi vs Optoma UHZ35

BenQ TK705STi is $400 cheaper, quieter and broader on HDR. Optoma UHZ35 is lighter.

Key differences
White light output
3,000 lm ANSI—
Native resolution
—1080p (1920 × 1080)
Throw ratio
0.8:11.4–2.24:1
Lowest input lag
5 msDerived4.4 msDerived
HDR formats
HDR10, HDR10+, HLGHDR10, HLG
Light source
LEDLaser (phosphor)
Fan noise
Normal 28 dB(A) · Eco 24 dB(A)Normal 35 dB(A) · Eco 28 dB(A)
MSRP
$1,999$2,199
Best price
$1,799—
Room fit
Distance to screen
1.8 m3.1–5.0 m
Picture
White light output
3,000 lm ANSI—
Claimed brightness (non-standard)
—3,500 lm
Brightness uniformity
—80%
Imaging technology
DLPDLP
Chip / panel diagonal
0.47 in0.65 in
Native resolution
—1080p (1920 × 1080)
Native aspect
16:9Derived16:9Derived
Pixel shift
—XPR 4-way
Addressable resolution
4K UHD (3840 × 2160)4K UHD (3840 × 2160)
Dynamic contrast
600,000:1500,000:1
Colour gamut
Rec. 709 98% coverage—
Colour bit depth (per channel)
10 bit—
HDR formats
HDR10, HDR10+, HLGHDR10, HLG
Greyscale control points
11—
3D
—Yes
3D glasses sync
—DLP-Link
Light source
Light source
LEDLaser (phosphor)
Emitter
4-channel LED—
Light-source life
20,000 h normal · 30,000 h eco30,000 h eco
Light output control
Steps—
Cool-down time
—90 s
Optics
Throw ratio
0.8:11.4–2.24:1
Image size
30–300 in26–303 in
Projection offset
100%116%
Zoom
DigitalOptical
Zoom ratio
—1.6×Derived
Focal length
8.5 mm20.91–32.62 mm
Aperture (f-number)
1.8—
Focus
Motorised—
Autofocus
Yes—
Autofocus runs
When moved—
Vertical keystone
30°30°
Horizontal keystone
20°30°
Auto keystone
Yes—
Auto setup
Fit to screen, Obstacle avoidance—
Motion & gaming
Frame interpolation (MEMC)
Yes—
Max input refresh
—1080p: 240 Hz · 4K UHD: 60 Hz
Input lag
1080p: 60 Hz 5 ms · 4K UHD: 60 Hz 5 ms1080p: 240 Hz 4.4 ms · 4K UHD: 60 Hz 17 ms
Gaming features
ALLM—
Inputs & control
HDMI inputs
2 × HDMI 2.1 (HDCP 2.2)HDMI 2.0 · HDMI 2.0 (eARC)
Other video inputs
USB-C (DisplayPort)—
Max input resolution
4K UHD—
USB media playback
Yes—
Control ports
12 V triggerRS-232
Horizontal scan
15–102 kHz15–140 kHz
Vertical scan
23–120 Hz24–240 Hz
Smart platform
Wi-Fi
Wi-Fi 6—
Bluetooth
5.2—
Ethernet
—Yes
Smart platform
Google TV—
OS version
11—
Netflix
Built in—
Casting
Chromecast built-in—
Audio
Speaker power
16 W15 W
Speakers
21
Audio outputs
3.5 mm, HDMI eARC, Bluetooth3.5 mm, HDMI eARC
HDMI audio return
eARCDerivedeARCDerived
Bluetooth speaker mode
Yes—
Physical & installation
Dimensions (W × D × H)
229 × 250 × 168 mm274 × 216 × 114 mm
Weight
3,800 g3,000 g
Colours
—White
Orientations
Table, Ceiling, Rear, Limited tiltTable, Ceiling, Rear, 360°
Ceiling mount
M4M4, 10 mm screws
Tripod socket
Yes—
Ingress protection
—IP6X (light engine)
Sealed optical engine
—Yes
Environment & power
Operating temperature
0–40°C0–40°C
Operating humidity
10–90%RH—
Altitude
2,000 m · high-altitude mode3,048 m · high-altitude mode
Power draw
Max 250 WMax 185 W · Eco 126 W
Standby
Up to 0.5 WUp to 0.5 W
Networked standby
Up to 2 WUp to 2 W
Power supply
External adapterExternal adapter
Mains input
100–240 V · 50/60 Hz100–240 V · 50/60 Hz
USB-C PD out
30 W—
Fan noise
Normal 28 dB(A) · Eco 24 dB(A)Normal 35 dB(A) · Eco 28 dB(A)
Safety & support
Laser class
—Class 1
Risk group
—RG2
Eye-protection sensor
Yes—
FDA laser notice
—Notice 57
Warranty
3 yr1 yr
User manual
https://esupportdownload.benq.com/esupport/PROJECTOR%20FOR%20CONSUMER/UserManual/TK705STi/TK705STi_UM_EN_260316112414.pdfhttps://region-resource.optoma.com/products/import/Documents/cbd58627-8cc5-43de-9633-fa24cd20bd45.pdf
In the box
In the box
Power cord, Power adapter, Remote, User manualPower cord, Remote, Remote batteries, Quick start guide
Remote
Voice—
BenQ TK705STi$1,799 · Amazon
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