Need help with 6mm versus 12mm

[Hitch 0]

I ordered an Axis camera in the 6mm version. Received the shipment today and it's the 12mm version. I am not sure if that will work for my application and would appreciate any thoughts/advice you all can provide.

 

I am going to install the camera inside my garage. I would like to install it above the door from the garage into the house. The camera, obviously, will face towards the two garage doors.

 

It is a pretty basic garage with two individual doors. They are not very wide at all. I would guess 9 or 10 feet. I can measure the width tonight, but there is probably 2 or 3 feet between the two doors and a couple feet on each side.

 

I went to Axis' site and ran the following. I think the 12mm is too narrow, but I am not sure how to interpret these.

 

Does the first one tell me that at a viewing distance of 12 meters that I will see 5.1 meters wide and 3.8 high?

 

And the second one tells me that at a viewing distance of 8mm that will see 3.4 meters with and 2.6 meters high? I assume this is an optimal viewing distance, as the lens does have an ability to zoom.

 

Any thoughts/advice on whether 12mm will work for me? If not, back it goes.

[mobbarley 0]

The lenses are electronically adjustable, 12mm is just the maximum.

 

You have the lens calculator right - but you don't have to set the lens to 12mm, you can use the full range of the lens slider.

[Hitch 0]

Many thanks! I think I am getting this.

 

Here is the difference between the two models re the lenses/range:

6 mm: 2.5-6 mm/F1.2

12 mm: 3.3-12 mm/F1.4

 

Here is the difference between the lenses as far as minimum illumination/light sensitivity.

6mm: 0.1 (color), 0.02 (B/W)

12mm: 0.15 (color), 0.03 (B/W)

 

From your comments, and looking back at the "Lens Calculator", I tend to think that the 12mm is fine as far as being able to capture the entire garage. The issue, however, is more likely to be that the 12mm model has a greater need for light. Whether that difference matters in real life, well, I really don't know.

 

Thanks again.

[ssmith10pn 0]

The issue, however, is more likely to be that the 12mm model has a greater need for light.

 

You can't see 1 tenth of a point in LUX.

[buellwinkle 0]

If this is inside a garage, how are you providing light for the camera or is this model with IR LEDs in it?

[Hitch 0]

It's the P3364-VE, so no built in IR. That's built into the P3364-LVE.

 

My theory about light is this. There are two garage doors and they both have motion sensors that turn on the lights contained in the openers themselves. The motion sensors are up close to the door going into the house. The garage doors also have sensors that turn on the lights if you walk in from the driveway. Also, one or both of the garage doors are usually open.

 

If both garage doors are closed, then there will be no light. But in that instance, there wouldn't be anything going on for me to be concerned about.

 

Does that make sense? Think it will work?

[tomcctv 187]

Hi it's not a camera you would want to use IR with.

 

 

If your garage door button inside has a light built in (find light) that will be enough for your axis

[Hitch 0]

Perfect. Thanks!