VIOFO Horizontal FOV Database

Can not understand anything.
This is the ruler I have, everything is clear from it
 

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gse said:
Can not understand anything.
This is the ruler I have, everything is clear from it
Click to expand...
Sorry, the links I intended to post didn't work out the way I wanted.

To calculate the AOV (Angle of View) using only a ruler see this post: (You might want to read some of the posts earlier in the thread to get some background.)

dashcamtalk.com

A229 Pro Test & Review PP

Sorry to intrude, but does this reboot issue occur if you’re using the hardwire kit or is it only with the cigarette lighter charger connection?
dashcamtalk.com dashcamtalk.com

You can use this method to calculate Horizontal, Vertical or Diagonal AOV.

The posts further on in that thread are more specific to Panzer's specific test setup and were suggestions on how he could proceed going forward.
 
gse said:
How to look at a ruler to understand degrees?
Click to expand...
Panzer's ruler is marked in centimetres, so after reading the number he has to use a right angled triangle calculator to get the degrees.
It would be much better if it was marked in degrees like yours 👍
However your's seems to be marked in degrees x2, so I'm not convinced that yours is the best either?
 
Nigel said:
However your's seems to be marked in degrees x2, so I'm not convinced that yours is the best either?
Click to expand...
My measurements coincide with the Panzer's, in the photo there is an angle of 119 Mini and I previously tested them on many using different tables, the result is positive.
 
gse said:
My measurements coincide with the Panzer's, in the photo there is an angle of 119 Mini and I previously tested them on many using different tables, the result is positive.
Click to expand...
Yes, it is the result that matters, you just need to understand the ruler that you are using, and yours is the easiest to read, no need for any extra maths 🙂
 
Nigel said:
...it was marked in degrees like yours...
Click to expand...
Hmm, never noticed that. Just took a quick glance at the thumbnail image and assumed it was a metric ruler. :banghead:
 
DT MI said:
Just took a quick glance at the thumbnail image and assumed it was a metric ruler.
Click to expand...
@gse was kind enough to send me the PDF file of the “degree ruler” I would have liked to use it because there would be no math involved.
However, I could not get my printer to print the document to the correct scale, and I had no way to confirm & verify the measurements.
I went with a cm “yardstick” so once I had it taped to the wall I could measure it to verify it was correct.
It takes several pieces of paper to print out the “degree ruler”.
 
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I hate to add a complication. Are any of the lens "amorphic", meaning compress more on the edges of the image. I need to back across a side walk with limited viability and I want backup camera with as wide an angle as possible.
 
John2001 said:
I hate to add a complication. Are any of the lens "amorphic", meaning compress more on the edges of the image. I need to back across a side walk with limited viability and I want backup camera with as wide an angle as possible.
Click to expand...
Yes, but most lenses are fairly similar, people don't like the ones with significantly more compression near the edges than normal because they result in very curved vertical walls.

Dashcams are not designed for use as reversing cameras, get a purpose designed camera for that job!
 
Q: What is the Horizontal FOV of the A329 2-CH, and how does it compare to past Viofo models?
A:

A329 Pro
111° FOV Front
106° FOV Rear
Prototype Telephoto & IR Interior coming soon.

FRONT:
..25° FOV A229 Pro & A229 Plus Telephoto
..93° FOV A119 Mini (2022)
..99° FOV A119 Mini 2 (2023) Original Lens
102° FOV A229 Plus
111° FOV A139 Pro
111° FOV A329
112° FOV A229 Pro
114° FOV A119 Mini 2 (2023) Updated Lens

REAR:
106° FOV A329
110° FOV A229 Pro & A229 Plus
125° FOV A139 Pro

INTERIOR:
122° FOV A229 Pro & A229 Plus
124° FOV A139 Pro

INTERIOR IR LED’s:
84° FOV A229 Pro & A229 Plus
98° FOV A139 Pro


1.) A329 Front .png

2.) Rear .png
 
Panzer Platform said:
111° FOV A139 Pro
111° FOV A329
112° FOV A229 Pro
Click to expand...
Do you think that the A229 Pro actually gives an extra degree, or is the difference just measurement error or maybe variation between samples?

Looking at your images, it appears to me that the A229 Pro was positioned a little further from the target, thus could see a little wider on the ruler. I think your camera mount is separate to your ruler, so maybe when you set it up, you didn't measure the distance between A229 Pro image sensor and target with the same precision as the others?

The A329 and A139 Pro look like the same lens design to me.
I think the A229 Pro is also the same lens design, just a little further from the ruler.
Same lens design doesn't mean the same lens quality, they may have improved the precision or lens coatings.

I'm not sure what accuracy you should expect to get with these measurements, the A329-A139 Pro comparison images are remarkably close, maybe an error of 1° should be expected.

Interesting, your A329 lens has a warped area on the right side, below centre at the 50 position, not a problem really, but it is warped:

A139Pro A329.gif

drive.google.com drive.google.com
 
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Nigel said:
Do you think that the A229 Pro actually gives an extra degree, or is the difference just measurement error or maybe variation between samples?

Looking at your images, it appears to me that the A229 Pro was positioned a little further from the target, thus could see a little wider on the ruler. I think your camera mount is separate to your ruler, so maybe when you set it up, you didn't measure the distance between A229 Pro image sensor and target with the same precision as the others?
Click to expand...
It took me 10 times to get the lens exactly 50cm from the wall, just like I did for all other cameras.
I appreciate your skepticism of margin of error to keep me on my toes.
I make every effort to maintain accuracy of the smallest detail in my testing.
Details are everything.
I stand by my measurement.

1.) A329 Front .png

A229 Pro Front .png
 
Panzer Platform said:
It took me 10 times to get the lens exactly 50cm from the wall, just like I did for all other cameras.
Click to expand...
I am curious as to the reason for the extra degree, when they appear to be the same lens, clearly there is a difference somewhere. I assume you are measuring to the glass front of the lens, not to the plastic?

It’s not the HDR, it is on for both, but there is a difference somewhere.
 
Nigel said:
I am curious as to the reason for the extra degree, when they appear to be the same lens, clearly there is a difference somewhere. I assume you are measuring to the glass front of the lens, not to the plastic?
Click to expand...
I've moved on to night time HDR performance testing.
When I get time I'll re-measure the A329 & A229 back to back.
Will that make you happy?
 
Panzer Platform said:
I've moved on to night time HDR performance testing.
When I get time I'll re-measure the A329 & A229 back to back.
Will that make you happy?
Click to expand...
Yes, I think if you did make a mistake then it was with the A229 Pro, just remeasuring that one would do. But if the result remains the same, the cause will probably remain a puzzle!
 
Nigel said:
if you did make a mistake
Click to expand...
Double, or nothing.
1.) If I re-measure, and the results are identical to my first measurement, you must request an A329 test unit, and begin your own test & review.
2.) If I re-mesure, and the results are different I will grant you one wish of equal value.
Put your money where your mouth is. Lol
Please don’t reply for 2 hours, I’m building the test rig for the A329 to test night time HDR performance.
 
First (just my opinion):
It should be AOV (angle of view), not FOV.
FOV without corresponding depth of field (DOF) is meaningless to me.
FOV should be measured in meters, feet, yards….., and with reference to respective DOV.
The AOV is measured in degrees (°) and is not dependent on distance/depth.

On test results and argument over 1° difference:
Everything has some (±) tolerance, nothing is perfect, i.e. if you take 10 A229 Pros, they will all have slightly different AOV, within the design tolerance, maybe say ±2°, just guessing.
With all due respect to @PP, the tests are also not perfectly identical, even things like slight differences in DVR or ambient temperature can introduce some deviation.

Finally, the test results should be used to draw informed conclusions, such as:
Based on the test results above, all of the following dash cams have the same AOV of 111°±2°:
A139 Pro
A329
A229 Pro
 
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