Help me choose: 4526 vs 4535 vs 4585

[NiToNi]

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?

 

[fenderman]

There is very little clarity benefit going from 2mp to 3mp...so I would go with the darkfighter...The 4k camera has a low lux rating so should be good at night but will probably cost a fortune.
Frames per second is a non issue...22fps is more than you will need.

 

[Mel42]

All those 4 line cam's are going to be $450+, if you do not need the zoom function the 2 line version 4MP DS-2CD2142FWD-IWS can be had for around $150.

 

[NiToNi]

Thanks for your input guys, good points and much appreciated.

I went with the DF 4526 for now but will probably get a 4585 after summer. If the resolution of the 4526 is not enough to meet ID requirements for the garden, I'll use it on my 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.

 

[fenderman]

h.264 is hardly a bandwidth hog...you will not have enough cameras to matter either way...

 

[NiToNi]

If 3MP is running at 8,192 kbps and 4K is four times the number of pixels, wouldn't the BW requirement also be 4x (i.e. 32,768 kbps) all things equal (compression etc)?

 

[fenderman]

If 3MP is running at 8,192 kbps and 4K is four times the number of pixels, wouldn't the BW requirement also be 4x (i.e. 32,768 kbps) all things equal (compression etc)?

The 4k camera only has three times the pixles as the 3mp...
8192 is a high bitrate for 3mp and 15fps...i usually run 4096...also I believe that the max bitrate you can set on the 4k hik is 16000...so unless you are mounting a few dozen cameras it really doesnt matter.