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Help choosing camera focal length

Sonic007

New Member
Messages
9
Points
1
Thread starter #1
Hi,

I'm looking at installing cameras and buying the relevant equipment.
I know what I'm getting for my NVR and am going for hikvision bullet cameras but unsure on the 2.8 or 4mm options.

The front of the house needs to overlook the driveway as in the photo. Im thinking 2.8mm?
The camera in the porch at the door I'm thinking 4mm?

Round the back of the house I need a camera looking at the rear back door and patio doors. I'm thinking a 4mm here?

What do you think.

Many thanks in advance.
 

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Dan

Administrator
Staff member
Messages
348
Points
28
#2
Hi @Sonic007

For the front of the house we would probably actually recommend the reverse - 2.8mm for the door and 4mm for covering the drive - this is because 2.8mm gives you the widest field of view over the shortest distance, so at 3-5m you will see a lot more with a 2.8mm camera than a 4mm, we would also recommend a Mini Dome for the door like this one - Hikvision DS-2CD2545FWD-I 4MP Mini Dome Network Camera - because they have a shorter IR range (10m) which will give you better detail in objects very close to the camera compared to the 30m IR on the Mini Bullet that will whiteout faces and objects that come very close to the camera.

For the rear of the house, a 2.8mm or a 4mm will work ok, a 4mm will give you ok coverage of the area directly in front of the patio doors but if you want larger coverage of the garden and surrounding space a 2.8mm would probably be the better option.
 

Sonic007

New Member
Messages
9
Points
1
Thread starter #3
Hi Dan.
Thankyou for the detailed reply.
That definitely seems to make sense. I’m saving up to buy the kit and will definitely be buying through this site.
 
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