Here is the TLDR: Got a new 2CD2347G2-LU and not very happy with the performance! Maybe I'm expecting too much of a $AU250 camera?
I wanted to give some feedback on my impression of my first 2CD2347G2 Gen2 ColourVu and for that matter the first ColorVu I've ever used.
From the outset I'm going to say that I am very much underwhelmed by the performance of this camera. The night imagery, which was the primary reason for the purchase, is poor at best in the application I had intended.
Background. I have a Hikvision 2CD2335FWD-I 4mm cam that has been in service for around 2-3 years and is covering an access gate to a property which is in a very dark area with very little artificial light. There is a street light at the front of the property but it casts very little light back toward the access gate and in any event the majority for the street light illumination is blocked by a small tree.
The 2CD2335FWD-I has performed well in this location and produces reasonably good night time images even without IR illumination Using Smart Events I am able to trigger external lights whenever an object comes into the field of view using a combination of line crossing and intrusion detection.
This works well since the imagery from the 2CD2335FWD-I is good enough without any artificial illumination to accurately detect people or objects moving into the field of view at which point the alarm would trigger artificial lighting which provides all the light needed to flood the scene.
On a moonless night the image produced is somewhat grainy but still good enough definition to activate the security lights. When overcast and/or a moonlit night the imagery is actually quite impressive.
The 2CD2335FWD-I is quoted as 0.008Lux at F1.6 and was marketed as an Ultra Low Light camera.
Already having tested and used a couple of 2CD2386G2 Gen2 Acusense 8MP cams I had a good idea of how they performed at night. Quoted as 0.005Lux at F1.2 I am extremely impressed with this camera's night performance. In fact with only a dim street light for illumination, it never switches to B&W mode. It is always produces a full colour image at night regardless of conditions.
Using the 8MP Gen 2 as baseline and being drawn to specs such as 0.0005lux @ F1.0 I started to think the Gen2 ColourVu would be a good upgrade.
Based on information available elsewhere the Gen2 ColourVu spec of 0.0005lux at F1.0 should produce a clear image in Full to Poor starlight. At least that was my understanding.
After receiving the 2CD2347G2 and bench testing I first came across the issue that I posted earlier about the loss of Smart Events when "Rotate" mode is enabled. This turned out to be an issue caused by firmware 5.5.150 and 5.5.160 but not present in 5.5.134. This meant that I was stuck at 5.5.134 unless Hikvision decide to resolve the issue but the Australian distributor will not officially support any firmware release after 5.5.134.
The interesting part is that the release notes for the G5 firmware which shows a comparison between the G2 and the G2(c) indicates that the "Monitoring" mode is only available on Gen2 8MP models which seems to contradict my experience where "Monitoring" mode shows up in the menus on the ColorVu Gen2 4MP when firmware 5.5.160 was installed.
On first use I switched the camera to portrait (Image -> Rotate) and noted a significant amount of "barrel" distortion in the image. I was extremely surprised since I only usually see that degree of barrel distortion on cams fitted with 2.8mm lenses. I double checked that I'd not been sent the wrong camera but it was a 4mm lens. I believe the distortion is accentuated in portrait mode. I suppose I shouldn't be surprised since a large 1/1.8" sensor combined with a relatively small lens is going to be stretching the image at the extremities of the image sensor.
On the image itself. I have a range of cameras ranging from 3MP up to 8MP and have been spoilt by the crisp imagery produced by the 8MP cameras because I immediately noticed the lack of definition in 4MP Gen2 ColorVu picture. I turned up the bit rate to 8192, set the encoding to H.265+ and frame rate at 25FPS but could not find a set of image parameters that gave me a satisfying image.
Not deterred I went about testing the camera at night in the approximate location where it would finally be installed. Unfortunately, there is where I was completely gutted when I could barely make out any detail in scene.
Whilst the camera was producing a colour image, there was no detail and lacked any definition in the shadows. The shutter speed as 1/25sec as opposed to the default of 1/12th sec which I felt was too slow a shutter speed and I wanted an apple for apples comparison with my 2CD2335FWD-I which has been running at 1/25th sec shutter speed.
I am possibly expecting too much from this camera but having read numerous reviews and after looking at user sample images on this forum and some vendor sites I believed that I would be able to obtain full colour, almost daytime like images from this camera but clearly the marketing spin does not carry over to reality.
Fortunately, I've only invested in the one camera for bench testing which I think I will be returning to the supplier because it does not live up to expectations.