Buying CCTV for PG (complete setup)

[shaktiprabha]

Hi friends,

I am running a PG on 2 floors and my building is 3 side open with parking + 4 floors + terrace. I have to install a CCTV setup of 8 cameras, 3 for ground floor & 1 on each floor including terrace. 2 cctv to be waterproof & rest normal. viewing distance on ground floor needs to be 45 feet max with clarity & on individual floors it should be max 15 feet.

As currently companies are providing online connectivity in DVRs too, I would prefer DVR of 8ch but i will be using the cat6 cable as through that i have future expansion slot and i can also open my electronic gates through that on the ground floor.

Please suggest camera & DVR accordingly (full setup).

 

[k_m_Arya]

Saw this posted on an ipcam forum. They suggested that the following resolution and sensor size should be matched to get a good picture quality.
720P - 1/3" = .333"
2MP - 1/2.8" = .357" (think a .38 caliber bullet)
4MP - 1/1.8" = .555" (bigger than a .50 caliber bullet or ball)
8MP - 1/1.2" = .833" (bigger than a 20mm chain gun round)