Optoma UHD35STx vs Optoma UHD38x

Optoma UHD35STx is lighter. Optoma UHD38x is $300 cheaper.

	Optoma UHD35STx$1,299 · Amazon Buy	Optoma UHD38x$999 · Amazon Buy

Key differences
White light output
White light output	—	4,000 lm ANSIPreliminary
Native resolution
Native resolution	—	1080p (1920 × 1080)
Throw ratio
Throw ratio	0.5:1	1.5–1.66:1
Fan noise
Fan noise	Normal 28 dB(A) · Eco 24 dB(A)	Normal 28 dB(A) · Eco 26 dB(A)
MSRP
MSRP	$1,749	—
Best price
Best price	$1,299	$999
Room fit80″100″120″150″
Distance to screen
Distance to screen	1.1 m	3.3–3.7 m
Picture
White light output
White light output	—	4,000 lm ANSIPreliminary
Claimed brightness (non-standard)
Claimed brightness (non-standard)	3,600 lm	4,000 lm
Brightness uniformity
Brightness uniformity	80%	80%
Imaging technology
Imaging technology	DLP	DLP
Chip / panel diagonal
Chip / panel diagonal	0.65 in	0.47 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	1,000,000:1	1,000,000:1
Dynamic contrast method
Dynamic contrast method	Light-source dimming	—
Manual iris
Manual iris	No	—
Gamma / EOTF presets
Gamma / EOTF presets	2.2, 2.4	2.2, 2.4
Colour temperature presets
Colour temperature presets	D93, D65, D55, Native	D93, D65, D55, Native
HDR formats
HDR formats	HDR10, HLG	HDR10, HLG
Tone mapping
Tone mapping	Adjustable	—
Colour management (CMS)
Colour management (CMS)	6-axis	6-axis
Picture certifications
Picture certifications	ISF	ISF
3D
3D	Yes	Yes
3D formats
3D formats	Frame packing, Side-by-side, Top-bottom, Frame sequential	Frame packing
Light source
Light source
Light source	Lamp	Lamp
Lamp power
Lamp power	240 W	240 W
Light-source life
Light-source life	4,000 h max · 10,000 h eco · 15,000 h dynamic	4,000 h max · 10,000 h eco · 15,000 h dynamic
Cool-down time
Cool-down time	90 s	90 s
Optics
Throw ratio
Throw ratio	0.5:1	1.5–1.66:1
Image size
Image size	36.43–301 in	33–300 in
Projection offset
Projection offset	116%	105%
Zoom
Zoom	None	Optical
Zoom ratio
Zoom ratio	—	1.11×Derived
Focal length
Focal length	7.51 mm	15.84–17.42 mm
Aperture (f-number)
Aperture (f-number)	2.8	1.98–2.02
Focus
Focus	Manual	Manual
Autofocus
Autofocus	No	No
Vertical lens shift
Vertical lens shift	None	None
Vertical keystone
Vertical keystone	40°	40°
Horizontal keystone
Horizontal keystone	40°	40°
Grid warp
Grid warp	Yes	Yes
Motion & gaming
Max input refresh
Max input refresh	1080p: 240 Hz · 4K UHD: 60 Hz	1080p: 240 Hz · 4K UHD: 60 Hz
Input lag
Input lag	1080p: 240 Hz 4.2 ms · 4K UHD: 60 Hz 16.9 ms	1080p: 240 Hz 4.2 ms
Inputs & control
HDMI inputs
HDMI inputs	2 × HDMI 2.0	2 × HDMI 2.0 (HDCP 2.2)
Other video inputs
Other video inputs	None	—
Max input resolution
Max input resolution	DCI 4K	DCI 4K
USB media playback
USB media playback	No	—
Control ports
Control ports	RS-232, 12 V trigger	RS-232, 12 V trigger
Horizontal scan
Horizontal scan	31–135 kHz	31–135 kHz
Vertical scan
Vertical scan	24–120 Hz	24–120 Hz
Audio
Speaker power
Speaker power	10 W	10 W
Speakers
Speakers	1	1
Layout
Layout	Mono	—
Audio outputs
Audio outputs	3.5 mm, Optical	3.5 mm
HDMI audio return
HDMI audio return	NoneDerived	NoneDerived
Physical & installation
Dimensions (W × D × H)
Dimensions (W × D × H)	315 × 270 × 118 mm	315 × 270 × 118 mm
Weight
Weight	3,500 g	3,980 g
Colours
Colours	White	White
Orientations
Orientations	Table, Ceiling, Rear	Table, Ceiling, Rear
Ceiling mount
Ceiling mount	M4, screws ≥ 10 mm	—
Environment & power
Operating temperature
Operating temperature	5–40°C	5–40°C
Operating humidity
Operating humidity	10–85%RH	10–85%RH
Altitude
Altitude	3,000 m · high-altitude mode	3,000 m · high-altitude mode
Power draw
Power draw	Max 320 W · Normal 320 W · Eco 220 W	Max 305 W · Eco 220 W
Standby
Standby	0.5 W	0.5 W
Power supply
Power supply	—	Built in
Mains input
Mains input	100–240 V · 50/60 Hz	100–240 V · 50/60 Hz
Fan noise
Fan noise	Normal 28 dB(A) · Eco 24 dB(A)	Normal 28 dB(A) · Eco 26 dB(A)
Safety & support
Risk group
Risk group	RG2	RG2
Marks
Marks	CE, FCC	FCC
Warranty
Warranty	1 yr (light source 3 mo)	1 yr (light source 3 mo)
User manual
User manual	https://region-resource.optoma.com/products/import/Documents/5ba3a4c4-9910-4450-86ed-8d571c21506b.pdf	https://region-resource.optoma.com/products/import/Documents/13cdc4ab-4017-4930-a4fd-d023d407c4fe.pdf
In the box
In the box
In the box	Power cord, Remote, Remote batteries, User manual	Power cord, Remote, Remote batteries, User manual
Remote
Remote	Backlit	Backlit

Optoma UHD35STx$1,299 · Amazon

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Optoma UHD38x$999 · Amazon

Buy