Optoma UHD35STx

DLP Projector, 4K UHD, 3600 Lumens, D:W 0.5:1, 1-Year Warranty, Price includes $150 instant rebate
Item #0601-3937 Model #UHD35STX
Price (after Jul 28)
SALE (ends Jul 28)


Optoma UHD35STx

Short throw 4K UHD gaming and home entertainment projector

Immerse yourself in a world of Ultra HD gaming, live sports and TV shows. The UHD35STx delivers impressive bright 4K UHD high-quality images, lightning-fast input lag as low as 4.2 ms and a high refresh rate of 240Hz — perfect for a competitive gaming advantage.

Featuring a short throw lens, it can be placed just a few feet away from the projection area while creating a supersized 100" image.

Convenient and easy to set up, this compact high brightness projector is ideal for well-lit environments so sports fans can enjoy live action with family or friends with the lights on. Boasting HDR and Amazing color technology, it delivers accurate true-to-life color reproduction for movie lovers.

An integrated speaker provides powerful sound and two HDMI inputs enable connection to multiple devices such as set-top boxes, games consoles and HDMI dongles. Weighing less than 5.6 lb, it can be taken to a friend’s house for a sports event, movie night or a gaming marathon — anywhere with a flat surface.

Key Features:
  • Incredible true 4K UHD resolution, perfect for big screen home entertainment and immersive gaming
  • Short throw projection: super-sized 100" image from just over a few feet away

  • Lights on viewing with bright 3600 lumens

  • Supports 1080p 240 Hz at 4.2 ms and 4K 60 Hz at 16.9 ms, for a competitive gaming advantage


  • Short Throw Lens: lets you project an impressive 100" image from just over 3 feet (1 meter) away. This allows you to place the projector closer to the wall, reducing shadows so you can present with ease.

  • Massive image, up to 300"(diagonal): Create and view images far larger than any TV with a projector. Perfect for recreating the immersive cinema experience in the comfort of your own home, or putting yourself in the game and enjoying an immersive life size experience. Split-screen multiplayer games are also more enjoyable to play on the big screen. (Screen size depends on space available — wall size and distance  and ambient lighting conditions.)
  • Lights on viewing: This all-round home entertainment projector combines high brightness and vivid colors for vibrant, true-to-life visuals in well-lit environments  ideal for watching TV shows, sports and movies or gaming with family or friends any time of day. (Note: assumes no direct sunlight or lights directed on screen.)
  • True 4K UHD Resolution: delivers sharper, life-like images and richer colors, allowing you to sit closer to the screen and enjoy a more immersive experience. Our DLP projectors provide CTA (Consumer Technology Association) approved True 4K UHD resolution, capable of projecting 8.3 million on-screen pixels. That's four times more detail than Full HD and twice as many as competing technology, which only delivers 4.1 million pixels.
  • Amazing color: Watch your movies and TV shows, and play games with stunning colors in any environment. Our home projectors are capable of reproducing the Rec.709 color gamut, the international HDTV standard, to guarantee accurate reproduction of cinematic color, or more saturated colors for a punchy looking image, great for gaming and animated movies.
  • Enhanced Gaming Mode: optimizes your projector for maximum contrast and vivid colors to capture every detail. It also reduces input lag down to as little as 4.2 ms for lightning-fast response times. (Note: When this setting is enabled, some settings will be disabled. Please refer to the user manual for more information.)
  • 240 Hz smooth motion: Enjoy ultra-smooth fluid motion and reduced ghosting. A high refresh rate makes it easier to keep track of the action, giving you a better chance of hitting your target earlier. Ideal for fast action gaming. (1080p 240 Hz PC gaming)
  • HDR and HLG compatible: Capable of receiving and displaying both HDR10 and Hybrid Log Gamma (HLG) HDR content, this Optoma projector allows you to see far more detail and texture. Objects look more solid and lifelike and the extra detail creates a greater sense of depth.
  • ISF modes: This feature allows you to save your calibrated day and night mode settings for the best possible viewing experience.
  • Dual HDMI inputs: Play games, stream videos and share photos on the big screen in the comfort of your own home. With dual HDMI inputs, you can easily connect to your games console, set-top box, laptop, PC, Blu-ray player or media streamer with a single cable. You can even turn it into a smart projector by connecting an HDMI dongle like the Google Chromecast™, Amazon Fire TV, Apple TV™ or Roku® stick.
  • Integrated speaker: Complete your home entertainment experience with the convenience of a powerful built-in speaker for exceptional sound quality and an easy setup without the need for costly external speakers. 
  • 24p: Most movies are shot at 24 frames per second (fps). To preserve the purity of the original image, Optoma projectors can accept high definition sources at 24 fps to display movies exactly as the director intended.
  • USB-Power: Use the USB-A port to power an HDMI dongle, such as Google Chromecast.
  • Four corner correction: Adjust the keystone in both the vertical and horizontal plane. You can individually warp each corner of the image to create a perfectly square image. Ideal for uneven walls or where projector placement is awkward, requiring installation at an angle.
  • Wall color adjustment: alters the projected image based on the color of your wall. With six options to chose from, you can easily adjust for blackboard, light yellow, light green, light blue, pink and grey walls to get the most accurate color gamut.
  • Backlit remote: designed using subtle white LEDs to light up the buttons, the remote is easy to see and operate, especially in the dark


Display Technology
UHD (3840x2160)
3,600 lumens
Contrast ratio
Native aspect ratio
Aspect ratio - compatible
Keystone correction - vertical
Keystone correction - horizontal
Horizontal scan rate
31 ~ 135 KHz
Vertical scan rate
24 ~ 120 Hz
Screen size
36.43" ~ 300.53" diagonal

Light source type
Lamp watts
Lamp life hours (up to)
4000 (Bright), 15000 (Dynamic), 10000 (Eco)
Throw ratio
Projection distance
Zoom type
Focal length
7.51 mm
Native offset
Inputs 2 x HDMI 2.0
Outputs 1 x Audio 3.5 mm, 1 x S/PDIF, 1 x USB-A power 1.5A
Control 1 x RS232, 1 x 12V trigger
Noise level (typical)
24 dB
Noise level (max)
28 dB
PC compatibility
2D compatibility
480i/p, 576i/p, 720p(50/60Hz), 1080i(50/60Hz), 1080p(50/60Hz), 2160p(50/60Hz)
3D compatibility
Frame-pack: 1080p24, 720p50 / 60
Full 3D
Security bar, Kensington Lock, Password protected interface
OSD / display languages
9 languages: English, French, German, Italian, Japanese, Portuguese, Russian, Chinese (simplified), Spanish
Operating conditions
5°C ~ 40°C / 41°F ~ 104°F, max altitude 3000 m /9843 ft, max humidity 85%
Remote control
Backlit home remote
Speaker count
Watts per speaker
10 W
In the box
AC power cord
Remote control
2x AAA batteries
Basic user manual
Input lag
4.20 ms
Power supply
100 ~ 240 V, 50 ~ 60 Hz
Power consumption (standby)
0.5 W
Power consumption (min)
220 W
Power consumption (max)
320 W
(W x D x H)
12.4" x 10.63" x 4.65"
(315 x 270 x 118 mm)
Net weight
8.77 lb (3.98 kg)


1 year limited projector parts and labor / 90 days on lamp