1/3" CMOS @ 4 MP versus 1/2.7 @ 5 MP - I have questions

[EMPIRETECANDY]

4K ones 1/1.8CMOS for high level model can do well now, mainly based on the budget, the 2431T-AS 1/3 cmos is a very good cost saving model for low budget camera. Here are some pics i post here.







Some Pics for the IPC-T2431T-AS

 

[EMPIRETECANDY]

And the 1/1.2cmos 4K IPC-Color4K-X at night full color night pics.

 

[Ollie]

A few tips....It is simple LOL do not chase MP - do not buy a 4MP camera that is anything smaller than a 1/1.8" sensor. Do not buy a 2MP camera that is anything smaller than a 1/2.8" sensor. Do not buy a 4K (8MP) camera on anything smaller than a 1/1.2" sensor.

You are looking at 3 budget cams, which use lessor quality material and sensors to sell a MP that the uninformed general public thinks they want. As an example, unfortunately, most 4k (8MP) cams are on the same sensor as a 2MP and thus the 2MP will kick its butt all night long as the 4k will need 4 times the light than the 2MP... 4k will do very poor at night unless you have stadium quality lighting (well a lot of lighting LOL). Starlight, ColorVu, Full Color, etc. are simply marketing terms, so don't be sold on those names.

Sensor sizing can confuse a lot of people LOL.

It is simple division:

1 divided by 3 equals 0.333

1 divided by 2.8 equals 0.357

Is a 1/2.8" sensor bigger than a 1/1.8" sensor? Most people say yes LOL. But it is a fraction, so the 1/1.8" sensor is the bigger of the two.

This applies to camera sensors too LOL:

View attachment 115403


The 3 cameras you reference above are considered budget cameras. The 2431 will only be recommended for those on a super tight budget, but for not much more a better 2MP or the 4MP 5442 series would be the better bet. The dome should be avoided for outdoors - you get glare, rain drops that stick to it, dust, etc.

Stay away from those 5MP. Ideal sensor size is:

2MP = 1/2.8"
4MP = 1/1.8"
8MP = 1/1.2"

So simply doing a ratio, a 5MP would need a 1/1.65" sensor to be comparable, and we just do not see a 5MP on a sensor any larger than 1/2.7".

A 2MP on the 1/2.8" sensor will kick the but of your 3 referenced cameras all night long. That 4MP will need over double the light of the 2MP at night.

How many of the reviews that you saw on those 5MP cameras were based on motion at night? Any camera can be made to give a great static image and all the Amazon reviews on those cameras are based on that.

The budget cam will make for an ok overview camera, but you shouldn't expect IDENTIFY capabilities from it in most instances.

There are also other available sensor sizes, which are bigger and i believe thus better.
5MP/8MP cmos. (5MP=2/3")
I'm new with this stuff, so i would be glad if someone could approve that.

 

[wittaj]

Show us a 5MP model on an ideal sensor or larger...are you sure it isn't a 1/3" sensor, which is only good for 0.8MP not 5MP or 8MP, yet many cameras do just that.

See this thread.

Night time camera selection w/motion involved

Everyone shops for a camera with a different approach to what might be the best camera for their install. I always check MP against sensor size as a way to remove undesirable cameras from my search. Once I found a camera with a desirable MP and sensor combo, I would then dig deeper on FOV...

ipcamtalk.com

 

[DanDenver]

which are bigger and i believe thus better.

Can you define what is ‘better’? Trying to understand what camera you own and have used at night with motion that is better than many of the cameras that have been recommended on this forum.

Also, I am not familiar with a 2/3 security camera sensor size. Not saying it does not exist, just asking if you can send me a link as I haven’t seen a camera with one of those (to the best of my knowledge). Short of some full frame 2 thousand dollar setups I have only seen that size on SLR cameras. Thanks.

 

[Ollie]

Show us a 5MP model on an ideal sensor or larger...are you sure it isn't a 1/3" sensor, which is only good for 0.8MP not 5MP or 8MP, yet many cameras do just that.

See this thread.

Night time camera selection w/motion involved

Everyone shops for a camera with a different approach to what might be the best camera for their install. I always check MP against sensor size as a way to remove undesirable cameras from my search. Once I found a camera with a desirable MP and sensor combo, I would then dig deeper on FOV...

ipcamtalk.com

hi,
Again, I might be wrong - therfore I was asked for someone to approve it.
Please look at this link:

HAC-HDW1509T(-A)-LED

HAC-HDW1509T(-A)-LED

www.dahuasecurity.com

look for "image sensor".

 

[Ollie]

Can you define what is ‘better’? Trying to understand what camera you own and have used at night with motion that is better than many of the cameras that have been recommended on this forum.

Also, I am not familiar with a 2/3 security camera sensor size. Not saying it does not exist, just asking if you can send me a link as I haven’t seen a camera with one of those (to the best of my knowledge). Short of some full frame 2 thousand dollar setups I have only seen that size on SLR cameras. Thanks.

HAC-HDW1509T(-A)-LED

HAC-HDW1509T(-A)-LED

www.dahuasecurity.com

 

[DanDenver]

Thanks for the link. Must be a before coffee thing, but I don’t see sensor size listed anywhere. So not sure what thoughts I have on it.

Do you like the night time movement performance of that camera?

 

[Ollie]

Thanks for the link. Must be a before coffee thing, but I don’t see sensor size listed anywhere. So not sure what thoughts I have on it.

Do you like the night time movement performance of that camera?

I don't have it, just considering buyig it - so I can't tyell about my experience.
see the attached file.

 

[DanDenver]

That’s fine, but without sensor size there is not much for me to comment on. I see the flyer list it as a 5MP sensor, but that is sensor density and has nothing to do with sensor size. Probably just overlooking where the sensor size is specified!

 

[sebastiantombs]

That's a CVI, composite video information, camera in the "Lite" series. Look at the minimum illumination spec of .001 LUX. A 5442, 4MP camera and a PoE camera, has a minimum LUX rating of .002. The spec saying 5MP for the sensor says nothing about how big it is.

 

[DanDenver]

Yeah, I did notice the lux rating was very poor by today's standards, or at least for the cameras I run.

 

[wittaj]

I doubt they are putting a premium sensor in a CVI camera and the Lux rating proves it. Saying 5MP CMOS says nothing about the size.

 

[DanDenver]

Never even heard of a CVI camera been so focused on POE cameras.

 

[wittaj]

The Swanns and Night Owl bread & butter are the analog CVI tech. Can't beat $300 for 8 cameras and a DVR lol.

 

[Ollie]

I doubt they are putting a premium sensor in a CVI camera and the Lux rating proves it. Saying 5MP CMOS says nothing about the size.

Any recommendations about an indoor cvi camera, which is have a quality picture at night? (Can be monochrome)
Cvi, because i want to use the exist infrastructure.

 

[Ollie]

I doubt they are putting a premium sensor in a CVI camera and the Lux rating proves it. Saying 5MP CMOS says nothing about the size.

Any recommendations about a cvi camera, which is have a quality picture at night? (Can be monochrome)
Cvi, because i want to use the exist infrastructure.

 

[DanDenver]

This thread has flipped from poe to cvi (and I don't even know what that is) so I cannot assist. You will find a good camera I am sure!

 

[sebastiantombs]

CVI means a camera that uses Siamese cable. A coax for the video and a pair of conductors for the power. Their advantage is that they are real time and do not have the inherent delay of an IP camera. Their disadvantage is that they're old tech an not being developed with updated sensor and features. The only real exception is cameras used in vehicles and some industrial settings where real time video is critical.

 

[DanDenver]

The specs don't read well and the cable pulling sounds painful. But no lag is some kind of win I guess.
Thanks for the breakdown on cvi cameras