Hi all. I don't have a real camera, I use my phone. When I load photos, 
Hugin asks me to enter some camera and lens data which phones specs don't 
include.

Lens type: Normal (rectilinear) (I guess phones have normal lenses)
HFOV: <missing>
Focal Length: 3.43
Focal Length Multiplier: <missing>

The camera says it has a horizontal view angle of 66.4, but that is not in 
the exif data.

As those 3 values are related, I now know that entering a Focal Length 
Multiplier of 7.71059 yields a HFOV of 66.4.
 
Is this OK? Maybe my guessing technique has some flaw you can detect.

With pictures I took with a different camera I get those values 
automatically

HFOV: 60.03375
Focal Length: 4
Focal Length Multiplier: 7.5

So I'm sure I'm at least close to the real values. I may need to round that 
Focal Length Multiplier number I guessed and get the real HFOV.
Any comments will be greatly appreciated.

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