Egy átlag mobiltelefon objektívjének, mekkora az ekvivalens gyújtótávja?

Apple vonalon ezt találtam, szerintem a többi gyártó sem nagyon készíti eltérő lencseméretekkel a mobiljait:

"So, how does an iPhone Xs or Xs Max stack up? The wide-angle lens on an iPhone Xs or Xs Max has a focal length of 4.25 mm, which is equivalent to 26 mm on a full-frame camera. That’s wider than the 28 mm equivalent in the iPhone 7+, 8+ and X models, and wider still than earlier models’ 33 mm equivalent. The telephoto lens is 6 mm, which is equivalent to a 52 mm lens on a full-frame camera. (Earlier iPhones, including the 7, 8, and the Xr only have one front-facing camera and lens.) In addition, the iPhone has a rear-facing camera, often used for selfies, that Apple now calls the TrueDepth camera. It has a focal length of 2.87 mm but neither Apple nor third-party reviews list the full-frame equivalent for this lens."