Optoma UHD38 vs BenQ TK700STi

Optoma UHD38 and BenQ TK700STi are both 4K projectors. What are the differences between them?

Regarding brightness, Optoma UHD38 has 4,000 lumens while BenQ TK700STi has 3,000 lumens. That is to say, Optoma UHD38 is much brighter.

In terms of throw ratio, Optoma UHD38 has a longer throw than BenQ TK700STi (0.90:1-1.08:1).

In view of the system, BenQ TK700STi has a built-in Android system but the Optoma UHD38 has no smart system.

In terms of noise, BenQ TK700STi produces a louder noise than Optoma UHD38.

Product Name

Optoma UHD38

BenQ TK700STi

Product Image Optoma UHD38 BenQ TK700STi
Price $1,449.00 $1,699.00
Our Rating 8.5 8.3
Brand Optoma BenQ
Category projector projector

Optical Parameters

Optoma UHD38BenQ TK700STi
Brand Brand Optoma BenQ
Brand Model Brand Model Optoma UHD38 BenQ TK700STi
Brightness (ANSI lumens) Brightness (ANSI lumens) 4,000 Lumens 3,000 ANSI Lumens
Display Chip Display Chip 0.47" DLP x 1
Display Technology Display Technology DLP DLP
Standard Resolution Standard Resolution 3840x2160 3840x2160
Maximum Supported Resolution Maximum Supported Resolution 3840x2160 3840x2160
Image Contrast Ratio Image Contrast Ratio 1,000,000:1 10,000:1
Throw Ratio Throw Ratio 1.50:1 - 1.66:1 (D:W) 0.90:1-1.08:1
Keystone Correction Keystone Correction Horizontal/vertical+/-40° Horizontal, Vertical, ± 40 degrees
Lamp Life Lamp Life 4,000 hours / 15,000 hours (Eco) 4,000 hours / 15,000 hours (Eco)
Lamp Type Lamp Type 240W Metal Halide bulb

240W Metal Halide bulb
Focus technology Focus technology manual focus
manual focus

Projection Parameters

Optoma UHD38BenQ TK700STi
Product type Product type Home theater Home theater
Operating System Operating System Android 10.0
Image Size Image Size,projector1 33" ~ 300" 29.96" - 300.15"
Screen ratio Screen ratio 16:9 (4K HD)
Screen color Screen color 96% Rec.709 color gamut
Image Technology Image Technology HDR
Bluetooth Bluetooth Bluetooth 4.2
3D Stereoscopic film is a type of film that was first introduced in Hollywood on May 24, 1953 when stereoscopic films appeared. Full HD 3D Full HD 3D
Sound System Sound System 10.0 Watts Mono 5.0 Watts Mono speaker


Optoma UHD38BenQ TK700STi
I/O Connection Ports Connection Ports Inputs 2 x HDMI 2.0, 1 x VGA (YPbPr/RGB), 1 x Audio 3.5mm
Outputs 1 x Audio 3.5mm, 1 x S/PDIF, 1 x USB-A power 1.5A
Control 1 x RS232, 1 x 12V trigger
HDMI-1 (2.0b/HDCP2.2) ,
HDMI-2 (2.0b/HDCP2.2)
USB Type A (x1) ,
USB Type A-1 (2.0/Power Supply1.5A)
RS232 in (DB-9pin) (x1)
WiFi WiFi 2.4G/5G Wi-Fi
Bluetooth Bluetooth Bluetooth 4.2


Optoma UHD38BenQ TK700STi
Size(HxWxD) Size(HxWxD) 12.4" x 10.63" x 4.65" 312 x110 x246 mm
Power Usage Power Usage 202W~305W 380 Watts
Noise Level Noise Level 26dB 35 dB / 29 dB (Eco)
Machine weight Machine weight 3.97kg 3.1 KG
Accessories Accessories AC power cord
Remote control
2x AAA batteries
Basic user manual
Remote Control w/ Battery RCI067
Quick Start Guide (x1) 21L
Warranty Warranty 1 Year 3 years
other other 4.20ms input lag at 1080P, 16ms at 4K (Fast Mode),16 ms (4K@60Hz),16 ms (4K@60Hz) *downscaling to 1080p,4 ms (1080p@240Hz),8 ms (1080p@120Hz)
Full HD 3D
Geometric Correction
Android OS
Streaming Apps