With its two (almost) 4 megapixel (Mpx) sensors placed side by side for a 180° field of view, the Argus 4 Pro delivers images of (almost) 8 Mpx, Reolink not hesitating to highlight before 4K. And why not 5K?! The definition certainly reaches 5120 x 1440 pixels, but we are far from video standards with images much wider than they are high. The definition is also no higher than for a “conventional” 2K camera in terms of height, just like the viewing angle (50°). The wide field of vision offered horizontally is no less appreciable, but creates a singular ratio and not necessarily practical when it comes to viewing images on a smartphone.
If the Argus 4 Pro is responsible for assembling the images from its two sensors, small adjustments are possible to prevent them from overlapping and hindering readability in the center. Reolink also offers to adjust the brightness of the images, the rendering of light and dark tones, as well as the frame rate and bit rate for the two video profiles intended for viewing: sharp (1536 x 432 pixels) and smooth. (5120 x 1440 pixels). It is impossible here to influence the quality and weight of the recordings. A night mode is planned, but Reolink has chosen to do without infrared vision to push its ColorX technology. This should reveal colors in low light, but requires the support of spotlights in total darkness. It is impossible in these conditions to obtain clear images without light in the visible spectrum.
By day
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The Argus 4 Pro doesn’t really shine when confronted with our test scene. In addition to a slightly crushed rendering in the width, its images are a little blurry, even if we find very fine elements, like the points of color on white and black backgrounds, which the Ezviz HB8 2K+ fails to render all of them. Overall, however, the latter delivers much sharper and more detailed images.
At night
Once our projectors are turned off, the Argus 4 Pro turns its own on after 3 seconds. The camera then delivers color images, but still not very sharp. The quality is still a notch below what can be observed in daylight, while the level of detail remains very good on the images from the Ezviz camera, whether using its infrared vision or its projectors.
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But while the Reolink camera struggles to convince when filming our scene, it does much better in our simulations. Movements are detected up to the end of our lab and people are recognized up to 7 m away. Above all, the Argus 4 Pro can identify a face up to 5 m away, compared to 4 m for the Ezviz camera.
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