Hikvision’s DS-2CD2T87G2-L ColorVu Gen2 fixed bullet camera features a very fast F1.0, 2.8mm lens (there’s 4 and 6mm options), 60 metres of white light and 4K resolution, an all-alloy body rated to IP67, as well as the ability to handle strong backlight thanks to 130dB of WDR.
The DS-2CD2T87G2-L ColorVu Gen2 is a capable fixed bullet camera with a solid specification, including a ½-inch sensor delivering 8MP (3840 x 2160 pixel) resolution, a fairly optimistic minimum scene illumination of 0.0005 lux in colour @ F1.0 with AGC on while unassisted, or 0 lux with white LED light activated, and a horizontal field of view of 102 degrees and a vertical FOV of 52 degrees from the fixed iris lens.
Central to functionality, the camera features Acusense technology, a deep learning algorithm able to distinguish pedestrians, vehicles and objects and report events based on rules around what they do. With Acusense, video clips are sorted into categories – people and vehicles, and users click a category and use time or location data to locate the clip. We met Acusense Gen 1 a year or so ago and really liked it.
The first thing I notice looking at the camera on a grey morning is barrel distortion, it’s 9-11 per cent. This is a fixed focal length lens and looking through the scene, I’d say it’s a very simple lens equation – there’s nothing in way of chromatic aberrations. Meanwhile, colour rendition is true, perhaps a touch low contrast.
The next thing that strikes me is the camera’s high resolution. This is a 4K camera, and that means I have more than the usual depth of field and more than the usual amount of detail deeper, as well as excellent detail levels close to the lens in medium to good light. This is going to give me better number plates and better face recognition.
There’s serious depth of field, considering this is a fixed 2.8mm lens. I can see grass stems, layered reflections, can see through the window of vehicles on the street and look at what’s inside. There’s a lot of detail of pedestrians, what they’re carrying what they’re wearing what’s on their feet, their fingernail polish, wristbands and more.
Check out the full review in SEN‘s September issue!
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