FOV of One Plus 6T?

Question

I was wondering what the Field of View is for the rear Camera is for the One Plus 6T.

The information I've been able to gather so far but I'm not sure if the information is 100% right.

4.25mm focal length (25mm equivalent) fixed lens to 35/50mm in full frame

The phone has a 1/2.6” sensor size So I should be able to calculate it using a simple formula but I can't seem to figure it out

Sony IMX519 Effective resolution in MP: 16 MP

Effective resolution in pixels: 4656 x 3496 pixels

Sensor size: 6.828 mm

Sensor Diagonal size: 1/2.6 inch

Individual pixel size: 1.22 microns

Thanks to anyone who can help.

EDIT*: To explain further I'm creating a 3d scene using the shot I took from my phone and then setting the scene up in 3DS MAX.

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References: https://www.xda-developers.com/oneplus-6t-camera-review/

iPhone 4 Camera Specifications - Field of View / Vertical-Horizontal Angle

Answer 1

This is better asked on Phys.SE.

That said, simple geometry implies that formula should be 2 arctan (Sensor size / 2 / Focal length), which suggests ~77 degrees. This however seems to be on the diagonal.

At 1.22 microns, 4656 pixels mean 5.68 mm, so you have ~66 degrees on width. Similarly, one gets ~53 degrees on height.