Again, Starvis is a marketing term by Sony and means nothing in real world applications...
3 cameras that are 2MP, 4MP and 8MP on the same size 1/2.8" Starvus sensor means that the 2MP will perform the best at night as it doesn't need as much light as the 4MP and 8MP on the same size sensor...
The words Accusense, ColorVu, Dark Fighter, Starlight, Starvus, etc. are simply marketing hooks and do not represent a specific technology advancement or feature....it is simple a marketing term used to supposedly sell the consumer on the ability to have good night vision. The actual capabilities of the camera is more important. I can make a crappy $40 camera look like noon at midnight with a wide open shutter, but the motion will be a blur...
This is an example from Reolink's marketing videos - do you see a person in this picture...yes, there is a person in this picture. This is why you cannot buy a system based on marketing terms like Starvus as this camera is marketed as having a Starvus sensor.... Could this provide anything useful for the police? Would this protect your home? The still picture looks great though except for the person and the blur of the vehicle... Will give you a hint - the person is in between the two visible columns:
View attachment 136574
Bad Boys
Bad Boys
Watcha gonna do
Watcha gonna do
When the camera can't see you
You might have to forget what you know about DSLR and high end photography cameras LOL as you play with these. Almost everyone that has come here with experience in DSLR cameras struggle with these cameras. Every one of these cameras have more processing of the images than a DSLR camera. Some are worse than others. Then there is the compression of the video, etc. Turn off NR on one of these cameras and you will see how much processing is used.
You will find a BIG difference between photography equipment and these cameras. Things like trying to match focal lengths are tough because it may be crystal clear on high end DSLR and not be clear with these types of cameras. Digital zoom works better on DSLR cameras than these. The sensors and optics just are not at the same level. These cameras are designed for 24/7 use with abuse from the elements. DSLR cameras are designed for a different working environment and purpose. Hang a DSLR camera outside and see how long it lasts LOL! But the quality would be better for the time it was working (but also a lot more storage needed too).
Remember these are surveillance cameras, not DSLR cameras, so you have to check your expectations. For example, you can see individual hairs and skin pores with DSLR photography equipment and you won't with these kinds of cameras. These are for a different use and different expectations.
- Sensor Size - a full frame DSLR sensor size is 864mm^2; whereas a 1/2.8" sensor popular on many cameras would be 20mm^2, so the "real" camera can collect over 40 times more light than a surveillance camera. And this doesn't even account for less light available for an 8MP versus 2MP for the same size sensor.
- Shutter Speed (Exposure) - Taking a picture with a "real" camera, you can slow the shutter down to 1/2s or longer for a nice clean picture of a person not moving. Perps rarely stand still and we need a shutter of at least 1/60s to minimize the blur.
- Aperture - With a "real" camera you focus on a specific part of the field of view, while a surveillance needs to focus on things in the foreground and background, which means the aperture is smaller, further compounding the light issue.
- Compression - A single 8MP image from a "real" camera could be upwards of 5MB of storage. In surveillance cameras, if you record at 15FPS, every second of video could be 75MB or more, which could equate to 6.5TB per day per camera. Obviously most are not going to have that kind of storage, so lossy compression algorithms are used to reduce storage and network bandwidth requirement, and that can add noise.
- Environment - a "real" camera is used mainly under ideal conditions, whereas a surveillance camera is going 24/7 in every type of element, so the design and size impacts its capabilities.