Maybe I am missing some camera basics, but from experience with both devices, i notice that with my Samsung S7, I am able to take full buildings in pictures at a close range. It has a wider field of view. But with my Nikon Lens which has a shorter Focal length 18mm, I have to take a few steps back to capture a whole building. That is, it has a narrower field of view. Why is this happening? What am i missing?
So what makes the difference between a fixed 26mm on a phone and an 18-55mm lens on a DSLR?