If the glory of home projectors in the 720p era belonged to Mitsubishi, then the scene in the 1080p era was dominated by Optoma. The HD25 model from Optoma helped many people realize their dream of a large-screen home theater. Entering the 4K era, after years of silence, Optoma finally unveiled its first 4K projector, the UHD620.
**Unremarkable Design**
In terms of appearance, the Optoma UHD620 is not particularly eye-catching—it has a rather understated look. The 1.6x zoom lens allows it to project a 100-inch screen from just 3.06 meters away, and for a 120-inch screen, a minimum distance of 3.7 meters is required, making it ideal for most living room setups.
The UHD620 features manual zoom and focus controls. The focus ring is located on the lens, while the zoom ring and lens shift knob are hidden under a cover above the lens. However, the lens shift range is limited—like most DLP projectors, it only offers a vertical offset of 0 to 15%.
All the menu buttons are positioned on the side of the unit, which I find very practical. These buttons are rarely used, so placing them on the side helps maintain a clean and elegant front design.
All input ports are located at the back of the unit. The most important thing to note is that only the HDMI 2 port supports HDMI 2.0, HDCP 2.2, and 4K resolution. Therefore, if you're connecting a 4K player, make sure to use this interface. HDMI 1 only supports HDMI 1.4a. Since the UHD620 has built-in speakers, you'll also find 3.5mm audio input and output ports on the back. It's always puzzled me why high-end projectors come with built-in speakers when most users will still opt for an external sound system. After all, even a basic home theater setup usually includes a dedicated audio system.
**Extensive Picture Adjustment Options**
The UHD620 boasts a brightness of 3,200 lumens, which immediately impresses upon startup. I quickly accessed the menu to lower the brightness. The projector comes with several preset modes: Cinema, HDR, Vivid, Game, Reference, Bright, and User. The Bright mode is ideal for daytime or ambient light conditions, but in a dark room, the Cinema mode is preferable, and brightness should be reduced. If you're using a larger screen, like 133 or 150 inches, the UHD620’s brightness ensures excellent performance. One important point: the HDR mode doesn’t automatically detect HDR sources, so you must manually switch to it when playing HDR content. Testing SDR content in HDR mode may enhance color and contrast, but it can distort the original colors, so it's best to avoid it unless you prefer the more vivid look.
The UHD620 also offers various picture quality adjustments, such as Gamma settings with options like Film, Video, Graphics, and Standard (2.2), 1.8, 2.0, and 2.4. I recommend using the Film mode for a more natural image. Brilliant Color is a standard feature in DLP projectors that enhances brightness, color saturation, and contrast. While it makes colors more vibrant, I suggest keeping it at level 3 for a balanced look.
Another point worth mentioning is the remote control's backlight. During my experience with another projector, the backlight was too bright, making it uncomfortable in low-light environments. This issue is something to consider if you often use your projector in the dark.
**Image Quality Evaluation**
As a 4K projector, the UHD620 naturally benefits from 4K sources. I connected it to an OPHD UDP-205 4K Blu-ray player to test several 4K movies and clips. The UHD620 delivers rich, vibrant colors and maintains the sharpness typical of DLP projectors. Its high contrast ratio (up to 1,000,000:1) results in deep blacks and detailed images. In "Fast & Furious 8," switching to HDR mode enhanced the sunlight effect, with excellent highlight and shadow details, especially for metallic car surfaces.
Among the 4K test clips, I particularly appreciated the UHD620's ability to render skin tones accurately, giving a realistic texture. However, there were some issues with black levels—some scenes didn't appear deep enough. Reducing brightness too much could cause loss of detail in darker areas.
When testing 1080p sources, the UHD620 still performed well, delivering a cleaner and more detailed image than expected.
**Summary**
As Optoma's flagship 4K projector, the UHD620 offers great value for money, priced below 20,000 yuan, making it more affordable than many competitors. It inherits the high-contrast advantage of DLP projectors, delivering a clean, three-dimensional image. With its high brightness, the UHD620 is a solid choice for those looking to experience 4K in a budget-friendly living room setup.
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For smart TV and box information, visit Smart TV/box information network sofa butler (http://), China's leading website for smart TVs and TV boxes, offering news, reviews, software, and support.
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