Not outstanding appearance
In terms of appearance, the Optoma UHD620 is not outstanding, but it looks rather low-key. The 1.6x lens in the center can project a 100-inch screen at a distance of 3.06m, and a projection screen of 120-inch requires a minimum of 3.7m, making it ideal for living room installations in most homes.
The UHD620 uses manual zoom and focus, the focus ring is designed at the lens, and both the zoom ring and the lens shift knob are designed beneath the hidden cover above the lens. But don't expect the UHD620's lens shift to be large. Like most DLP machines, the UHD620 only provides a 0 to 15% offset in the vertical direction.
UHD620 all the menu buttons are designed on the side of the fuselage, which I like very much, because these buttons are almost never used, if the traditional way to put the top of the fuselage will affect the appearance.
All interfaces are located in the rear of the fuselage, the most important thing to note is the two HDMI interfaces, only HDMI 2 is compliant with the HDMI2.0 interface specification, supports HDCP2.2 and 4K, so connecting 4K player must connect to this interface . HDMI 1 only supports the HDMI 1.4a specification. Because the UHD620 has a built-in speaker, you can also see 3.5mm audio input and output interfaces on the interface section. In fact, I have always had such a question in my mind: I can understand the built-in sound of home projectors within 10,000 yuan, but why is the built-in stereo on home projectors for high-end users apparently priced at over 10,000 yuan? More than 99% of home users who choose this type of projector will configure a home audio system for the projector.
Rich menu adjustment
The UHD620 has a high brightness of 3200 lumens, so on booting it made me feel its extraordinary brightness performance and hurried into the menu options to reduce brightness. In the menu, I see that the UHD620 presets several preset modes such as Cinema, HDR, Vivid, Game, Reference, Bright, and User, among which the bright Bright mode is suitable for use during the day or when there is ambient light, and in my In the dark test environment, the Cinema mode must be selected, and the brightness should be reduced. After all, my curtain is only 100 inches. If you choose 133 inches, or even 150 inches of screen, then choose UHD620 is correct, it has a brightness of 3200 to fully guarantee the brightness of large screens. Here is to remind HDR mode. The UHD620 does not automatically recognize the HDR source and switch to HDR mode, so if you are playing HDR sources, remember to switch to HDR mode. As for the ordinary SDR film source can use HDR mode? I tested a bit, SDR film source in the HDR mode screen color more intense, brightness and contrast increase, although it may be more pleasing, but lost the original color, so I do not recommend the SDR film source using HDR mode.
UHD620 also offers a variety of picture quality adjustment options, such as Gamma built a variety of gamma adjustment programs: Film, Video, Graphics and Standand (2.2), 1.8, 2.0, and 2.4 and so on. My suggestion is to choose Film mode. Brilliant Color is a standard image quality technology for DLP projectors. It enhances the brightness of the screen and enhances the color saturation and the screen contrast by enhancing the processing of the halftones. This makes the screen colors more realistic and vivid, just from my many years of experience. Look at this value should not be set too high, generally I will choose "3."
In addition, I think it is necessary to remind us again about improving the backlight design of the remote control. I mentioned this problem when I was experiencing the Austrian pattern projector. The backlight of the remote control was too bright. It was better to use it in the bright living room or during the day. If you use it at night or in a dark environment, it's really bright and blinking.
Quality appreciation
Since it is a 4K projector, it is natural to use a 4K source test. Connected to the OPHD UDP-205 4K Blu-ray player to play several 4K Blu-ray movies and 4K test clips for the UHD620. UHD620's color style still belongs to the obvious beauty of the Department of the rich colors, and inherited the DLP has always been the sharp style of the picture. High-contrast is the advantage of DLP projectors, UHD620's nominal contrast ratio up to 1000000:1, so from the actual screen effect to see the rich details of the screen, and a good three-dimensional sense. In the 4K Blu-ray movie "Speed ​​and Passion 8" I tested, when switching to HDR mode, the UHD620 immediately showed a very good sense of sunlight, and the details of the highlights and shadows were well displayed, especially for metallic cars in the sunshine. The details are not lost without detail and have a good metal texture.
Among other 4K test sources, my favorite is UHD620's ability to restore skin tone, which shows a good skin texture. However, I see that there are still some deficiencies in the UHD620, because the brightness is too high and some of the black in the film can not sink, if you blindly reduce the brightness will lead to the loss of dark details.
The 1080p source is also the focus of my experience, after all, this is our most easily available source. The UHD620 fully exploited the high-definition advantages of the 4K projector when interpreting the 1080p source, allowing the 1080p source to have a cleaner picture and richer image details.
to sum up
As the number one weapon in the Optoma's 4K market, the UHD620 does not sell for more than 20,000 yuan, so it has a price advantage over many 4K projectors. Secondly, it inherits the high contrast advantages of DLP projectors. The screen is clean and three-dimensional. With the advantages of high brightness, UHD620 is a recommended living room for those who are eager to experience 4K screens and have a small budget. 4K cinema projector.
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