Hello All,
I am using a smartphone whose focal_length is 3.85mm and i use analog_exif to retrieve the exif info.
I took one photo (A) and i see the "Focal Length in 35mm" is 35mm.
I took another photo(B) of the same object but this time i "zoomed" it. The "Focal length in 35mm" is then 108mm.
As the zoom is only a digital magnification i want to reduce the size of the photo B by a factor 108/35.
Then for calculations i will only use one focal length: 35mm.
Is my My reasoning correct?
Thank you for you help Alvaro