Camera Choice For T Intersection / Hallway?

Jay, on the Dahua side, I don't think there are any applicable multi-imager options (see Dahua multi-imager list).

The lowest cost one I know of is the Axis P3707-PE, ~$1,110, though this is one of the shortage / super back ordered ones. There is the Avigilon 3 sensor one if you are an Avigilon dealer. And then there's Arecont if you are brave....

Recently we have worked on a couple of school projects and have used fisheyes or Avigilon's 3 head multi-imager for applications like this. 

Dependent on length of hallway and what needs covering.

Why not use the Dahua 5MP fisheye EB5500?

To answer this question with the degree of confidence I'm accustomed to, I would need to know the length of each of the three hallways.

As mentioned above, the Axis P3707-PE is becoming our new standard in these scenarios....if you can get one.  I really like the camera though.

As mentioned in other posts, a lot depends on hallway length, ceiling height and whether this is providing situational awareness for the SOC or high-quality archives for investigations post-incident. 

I'd consider a 180-degree or fish-eye covering the middle hall and elevator bank.  For the 2 longer halls, I'd use fixed wide angle cameras at either end per hall (4 total) or again depending on distance and how they're to be used, go 1 PTZ and 1 fixed WA on either end of each longer hall, 5 cameras total. 

Regarding turning off an imager, we did an install with a P3707-PE/Genetec and only really needed 3 imagers as well, and were able to disable the unused stream through Genetec. If not you could point it straight down, which could be a blind spot depending on how the other 3 are aimed.

Hello,

I had arecont & avigilon reps come out and demo their multi imagers in the hallway where I need coverage.  Terrazzo flooring, ceilings 12' approx., high glare from floor.  12mp with WDR gave great images.  There is elevator banks on both sides with hallways extending past.  you  could id in elevator area and tell what door a person entered down the halls.  The WDR makes a huge difference.  Haven't installed anything yet due to money, government project.  Avigilon draw back is they don't talk to genetic.  

Have reps come out and do proof of concept, doesn't cost anything but time.

Fisheye loses Pixels per foot very quickly, good for situational awareness.  So your individual setup as to distances and such impact what you choose.

V/r

Kelly

Another option is to use an axis M3048-p fisheye mounted to the wall on either end of your H to give you a 180 view both sides.  That should give the coverage you want.  

Your best bet right now is Arecont SurroundVideo Omni, either 12MP WDR (preferred, especially if there are windows or doors leading to the outside, or shiny floors) or 20MP. Arecont has a huge sale on these cameras until the end of September. You can point one sensor in each location and the fourth sensor can be pointing down to eliminate blind spots directly in front of the camera. 

If you have a scaled floor plan, I can make a camera design for you and send you a coverage map. I can also design a custom Milestone server, or quote you on Dahua. eDigitalDeals is an authorized reseller of both. 

Contact me for more info: rshadman@edigitaldeals.net or 310-876-1540 direct line.

I believe the new Hanwha multisensors have hallway view. Aim one down and three down the halls. If you just need general coverage, I'd go with a 9mp fisheye (you don't get 12mp usuable with any, that's sensor resolution).

I use a 3707 for this situation. Two of the imagers are aimed down the hallways. The two imagers on the 'inside' I have aimed at the elevator cabs on either side, so they are in a V shape.    So, if the camera is along the wall, the 4 heads look like this 

         ele   L                 ele R

Left hallway  __V__   Right hallway

But, as noted, they are on heavy back order.   There is a Samsung/Hanwa comp unit that is more expensive, and I hear they are on a back order as well