2.8 or 4mm?

[turbov6camaro]

Hello

I Like my 3mp bullet cams But i hate the spiders im looking to expand my cameras and put up domes

I read the 4MP have a wide field of view and 2.8 mm is not needed as much.

I have a large area to cover a round my house and the current 4mm are not nearly cutting it.

Should i spend extra on 2.8-12mm moterized focus?

also my currenhik vison seem so loose focus as time goes by.

I'm looking at Dahua cams now and some wireless Hiks to cover area im not running wires. (4 total wireless) Ill make a second network for my computers

 

[nayr]

http://ipvm.com/calculator

I say 4mm, because staying above 100ppf at night means all targets have to be within 16ft for an ID on 2.8mm, where as you get a more reasonable ~22ft with a 4mm.. personally I think most people should use 6mm, you get a decent Id out ot 33ft which is more appropriate for driveways, and the vast majority of residential install points.. your not running a casino, no need to cover every square inch in video coverage.. you just need to ensure any person or thing trespassing on your property is identified so they can be apprehended & prosecuted.

yeah its nice not having any blnd spots, but dont sacrifice your capabilities to achieve it.. or you'll end up with a video recording showing someone's every movement.. but absolutely no hope for identification.. imho thats a complete failure.

 

[turbov6camaro]

thanks for the tips, my house is an odd shape and sometimes we get false alarms, and we have a few areas we cant verify. just trying to cover entrances to the house really. I have a 2.8 at my front door, but that camera is alos blind if you come in the right way on it. stuff like that.

but my other camera are mount up a bit higher so that may help. but my 4mm right now are not much much help in some area becuase it can not see up close to the house, I admit may need to place cameras a bit better lol

ill check out htat calculator, thanks for the help. about to buy 8 cameras and dont want to do it wrong i though about a PTZ on the driveway so i can look closer at cars if i need to.

http://ipvm.com/calculator

I say 4mm, because staying above 100ppf at night means all targets have to be within 16ft for an ID on 2.8mm, where as you get a more reasonable ~22ft with a 4mm.. personally I think most people should use 6mm, you get a decent Id out ot 33ft which is more appropriate for driveways, and the vast majority of residential install points.. your not running a casino, no need to cover every square inch in video coverage.. you just need to ensure any person or thing trespassing on your property is identified so they can be apprehended & prosecuted.

yeah its nice not having any blnd spots, but dont sacrifice your capabilities to achieve it.. or you'll end up with a video recording showing someone's every movement.. but absolutely no hope for identification.. imho thats a complete failure.

 

[nayr]

yeah soulds like you might reconsider your current placement, a 2.8 at the front door should be a piece of cake to make unavoidable.. put it right above the door if you have to.

are you using video motion for triggering alarms? if so dont do that, video motion is mostly for saving disk bytes when looking at a mostly unchanging scene.. if you set it up right and its working your likely to get 100 false triggers for every 1 very important one.. but thats fine, you got the important one and had no chance of missing it.. personally i just record 24/7 outdoors, you never know what your going to need.. I doubt you have your camera's tuned for a UFO Crash, Bigfoot Encounter, hehe.. but seriously, stuff like hearing distant gunshots or getting all traffic can help you time events you didnt intend to catch.. its like $33 a terabyte right now, diskspace is cheap.

if you want alarms and notifications, put in physical sensors that tell you door is open 100% reliably.. so when you get alerted your door just opened, you dont question it and act.. reaction time is important and doubting your alarm system is no good.. video cameras are not an active security system.

 

[turbov6camaro]

so my house I blind to my driveway, I have alerts set up on that and my front door. my front door has SD card and Iet record 24/7 ad Blue iris record motion

have you seen these ?

reolink?
http://www.amazon.com/Reolink-Secur...=UTF8&qid=1461943459&sr=8-17&keywords=4mp+ptz

yeah soulds like you might reconsider your current placement, a 2.8 at the front door should be a piece of cake to make unavoidable.. put it right above the door if you have to.

are you using video motion for triggering alarms? if so dont do that, video motion is mostly for saving disk bytes when looking at a mostly unchanging scene.. if you set it up right and its working your likely to get 100 false triggers for every 1 very important one.. but thats fine, you got the important one and had no chance of missing it.. personally i just record 24/7 outdoors, you never know what your going to need.. I doubt you have your camera's tuned for a UFO Crash, Bigfoot Encounter, hehe.. but seriously, stuff like hearing distant gunshots or getting all traffic can help you time events you didnt intend to catch.. its like $33 a terabyte right now, diskspace is cheap.

if you want alarms and notifications, put in physical sensors that tell you door is open 100% reliably.. so when you get alerted your door just opened, you dont question it and act.. reaction time is important and doubting your alarm system is no good.. video cameras are not an active security system.

 

[MaryChong]

Why not go for a PTZ security camera? PTZ cameras are suitable to monitor a wide range area. So you don't need to worry about the angle any more.