Help me choose: Hikvision 4526 vs 4535 vs 4585

[NiToNi 0]

I am choosing between these three models:

 

4526: http://overseas.hikvision.com//uploadfile/image/20150413111741603.PDF

 

4535: http://overseas.hikvision.com//uploadfile/image/20150417022147307.PDF

 

4585: http://overseas.hikvision.com//uploadfile/image/20150422082615905.PDF

 

The camera will cover my back garden, 20 x 20 ft, 90 degree view from a corner. There is no direct lighting but it is far from pitch black as it has some indirect light spill from a few far-away street lights.

 

The way I see it, it's a trade-off between low-light performance and resolution. It would have been nice to have the high-pixel density of the 4585 in order to meet ID requirements (500px/m) up to 16 ft. On the other hand I suppose the Darkfighter's performance would be superior at night, but by how much, and enough to go for 2MP only. High FPS is another bonus with the 4526. Perhaps the 4535 is the golden compromise with respect to these parameters with a motorized lens to boot?

 

4585: High resolution, medium light sensitivity, no true WDR, low FPS; or

4535: Medium resolution, medium light sensitivity, true WDR, medium FPS; or

4526: Low resolution, high light sensitivity, true WDR, high FPS.

 

What do you guys think?

[SyconsciousAu 0]

That 500ppm Identification standard seems to be something Axis has come up with and something generally accepted in the UK.

 

Australian Standard 4806 puts identification at 352ppm though Australian and New Zealand Police guidelines recommend 421ppm (120%)

 

 

You are looking at out laying some serious dollars for those cameras too.

 

Have you considered two of Hikvision's less expensive 3mp offerings instead? Something like the 2032, 2132, 2332, or 2732?

 

Advantages:

You could mount them on opposite corners of the building facing each other so one camera covers the other.

Unless he walks backwards an offender in the back yard will always have his face captured by one or the other.

You can still cover the whole backyard without needing the really wide 2.8 lens which will probably cause spherical aberration and IR bleed in a dome.

The IR on each camera will support the other.

You have at least $200US you can spend on something else like an IR illuminator for night time shots.

You could even put in 4 cameras with 2 x 6mm and 2 x 12mm lenses in for the price of one of the smart cameras and cover the entire back yard at more than 420ppm.

 

Disadvantages

 

Not all the "smart" features

IR on the cheaper camera's is not quite as good as the more expensive ones

No SD Card slot in some of those cheaper models.

More recording storage for 4 cameras if you go that route.

[MaxIcon 0]

If you need high FPS, that's a key decision, but most people get by fine with 10-15 fps for surveillance. Unless you have a special need for it, I'd knock that off your decision tree.

[NiToNi 0]

Thanks for your input which is much appreciated.

 

Well I am in the UK so 500ppm makes sense for me. Using the formula:

 

radius = horizontal rez x 11.46 / viewing angle; where 11.46 is rounded from (36 / pi)

 

the distance from the camera at which the pixel density is 500ppm at 90 degrees viewing angle is in each case:

 

4526: 1920 x 11.46 / 90 = 244 cm = 96"

4535: 2048 x 11.46 / 90 = 261 cm = 103"

4585: 4096 x 11.46 / 90 = 522 cm = 205"

 

based on that, the 4585 is the only one giving me compliant coverage of most of my garden, including a shed with bikes at the far end. So resolution is important but so is also low-light capability. I do agree though that FPS may not be an important factor in this application.

 

I prefer to use one 4-series camera over four 2-series cameras if I can for simplicity. Running cables is a pain and I don't want to come across as completely paranoid to neighbours and friends

 

I went with the DF 4526 for now but will probably get a 4585 after summer. If I am not happy with it for the garden, I'll use it on my smaller terrace instead. A disadvantage of the 4585 is that it is still H.264 only, making it a BW hog, whereas the next 4K gen will probably have H.265.

 

Price differs of course between the two models. I got the 4526 for $395 whereas the 4585 would be $655, in both cases including bank charges and delivery by DHL. For comparison, the cheapest I've seen the 2742 for on Aliexpress is $299 so not that much cheaper:

 

http://www.aliexpress.com/store/product/Free-shipping-hikvision-english-version-DS-2CD2742FWD-IS-Audio-4MP-WDR-Vari-focal-Dome-Network-Camera/1152139_32373484891.html