Can anyone enlighten me as to these lens characteristics of the Wyze Cam V2 and V3?
Specifically, horizontal field of view not diagonal.
Thank you.
Go Google it
@n6ac
The v2 has 110 degree field of view and the v3 has a 130 degree field of view
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@WyzeJasonJ –
I believe those are diagonal measure.
And are the 2 really different? By lens focal length, or sensor size?
Want to know FLs.
@kae4560 –
Not found in Google !!!
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@n6ac
My understanding is it is field of view across (side to side). I do own both the v2 and v3 and they are slightly different. The v3 can see a bit further to each side (5 degrees),
About all you will get from the V3 specs in the Wyze Shop, and FCC data file…
130º FOV - 1920x1080p
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So, it appears that –
V2 diagonal FOV = 110°, sensor diag ~8mm, thus focal length ~2.8 mm ?
V3 diagonal FOV = 130°, sensor diag ~7mm, thus focal length ~1.6 mm ?
The calculations of focal length assume that the sensor chips are functional edge-to-edge, roughly scaling from the FCC site photos (V2 is at < https://fcc.report/FCC-ID/2ANJHWYZEC2 > )
My reason for asking is wanting to know what FOV will result if buy swap-out lenses.
Currently we have put a 16 mm in old V2, calculates as 28 degrees diagonal based on above.
If the above assumptions are correct, a 16 mm would bring a V3 to about 25 degrees diagonal.
For 1920x1090, width is 0.8716 times the diagonal so horizontal field of view for V2 is 96°, V3 is 114°
And pixels per horizontal degree – V2 is 20, V3 is 17 (rounded) with stock lens.
A 16 mm lens makes pixels per horizontal degree thus – V2 is 79, V3 is 89, with above assumptions.
Both enough for reading a license plate at 60 feet (12 inches wide, one degree).
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I don’t know if using 1920x1080 to compute FOV is accurate.
Example:
Wyze OG: 121.4°(DFOV), 102.3°(HFOV), 54.1°(VFOV)
If you do the math, sqr root of (side squared + side squared)= hypotenuse (the diagonal) you get: (102.3^2+54.1^2)^.5=115.72, not the stated DFOV of 121.4.
I’m guessing this is due to the wide-angle lens distortion.
Also if you compute the number of pixels per degree there is a difference between horizontal and vertical:
1920/102.3= 18.77 pixels per degree
1080/54.1= 19.96 pixels per degree
I can’t find the V2 and V3 specs online and would love it if someone would actually compute HFOV and VFOV by measuring them using the camera. Better yet, I wish Wyze would just provide these.