Is it worth it to change the FOV on the JooVuu?

Eye0nU

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First post: I am trying to get the best quality out of this thing so I can read plate numbers. I was considering lowering the FOV to about 120 deg from the standard 155 deg so it can focus all of it's bit rate on just that section. However, I am wondering if I would be wasting my time due to it acting like a digital zoom where you don't get any "extra" quality? Haven't tested this myself yet, but I was wondering if others have already. What ya think?
 
First post: I am trying to get the best quality out of this thing so I can read plate numbers. I was considering lowering the FOV to about 120 deg from the standard 155 deg so it can focus all of it's bit rate on just that section. However, I am wondering if I would be wasting my time due to it acting like a digital zoom where you don't get any "extra" quality? Haven't tested this myself yet, but I was wondering if others have already. What ya think?

Hi @Eye0nU
Firstly, welcome to the forums!

It does act as a bit of digital zoom, but some people like this - I personally have mine on 155 but I know @kamkar1 has his on something different.

I always like my dashcams with the widest possible FoV simply because I like to see as much as possible, but a lot of people just use it for reading plates - it's really what you are looking for :)

Cheers,

Dan
 
Welcome to the forum.

I am back to 155 on my cameras, or rather one is down to like 70.80 degrees or so, but thats done by fitting another lens ( 8 mm ) to the camera.

I have done some experimenting on the digital zoom of the camera, and all seemed to be working allright.
But there is really only one way to get things a little closer and thats using optics.

Here is a fresh video from the x camera with the 8 mm lens, as you can see/ feel it give a more up and personal experience, and in the footage you can read plates ahead of you just about as far as you can in the car usiog your eyes.

I think its really cool to have this in the windscreen, but you really got to have a wide angle camera there too cuz you loose a lot on the side.
On the other hand having been experimenting with this lens for some weeks now it seem to me that your chance of capturing a plate is higher at least in low light and weather like rain.

I would like a better 8 mm lens, this one is not a high grade lens, still its not all that bad.

In this video first you get the 155 degrees, and after that the same from the camera with the 8 mm lens.


And another one with me comming up on a beemer-boy at a intersection, as you can see the rear of the BMW fill the screen just about as it do in my little snub nosed car

 
Thanks for the reply all. I did some more tests and I think I found a funny trick to reading plate numbers. Gonna try a few more tests before I comment more. But at least this question has been answered.
 
Dan,
Is there a narrow lense (90 - 60 deg range) you can suggest for the model X?
I prefer to buy an X if I can get the FOV tight.
 
@albertson
I think the X uses a standard lens thread, M12 maybe? In that case you could use any lens which matchs that standard.
@kamkar1 is the only person I know of that has changed the lens on their JooVuu X, see the video example above.
 
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Yeah the X cam also use the m12 - 0.5 pitch thread used in most action and cctv cameras.

I am planning on ordering this one when i feel i can afford it, cuz the 8 mm lens i already have is not a megapixel one i am sure.

https://www.peauproductions.com/collections/gopro-hero-3-white-lenses/products/gp80016

Peau have a wide range of these lenses, but some are quite expensive.

https://www.peauproductions.com/collections/gopro-hero-3-white-lenses

But if you want a lens with 60 - 90 degree FOV then you will have to go below 8 mm lens and look at something in the 4 - 6 mm size.

I feel the 8 mm lens is more in line with what you can see with your own eyes, off course without the wide FOV our brain make us think we have.
But 8 mm is also pretty narrow FOV, but not to a degree it bother me, but this is due to i also have a wide FOV camera beside the X camera.

If you FF to 2:08 in this video you will see a event first with the stock x camera lens and after that with the other x camera with the 8 mm lens installed.
You might want to open the same video in 2 windows so you can pause my car at the same place during the event and then compare the 2 cameras.


This is the same modified camera where i pull up behind a van waiting for green light, im stopped the usioal distance from the van, and thats like 3 feet from it.
And my car is a "snub nose" so from the front of it to the dashcam is also only a few feet.
So snub nosed even on wide angle cameras you can hardly see anything off my front as it start to dive down as soon as the windshield ends

 
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