Ditch mm. Time for AoV.
These days, with so many digital cameras sporting different sensor sizes and different lenses to zoom from here to there, the “mm” reference for that camera means zilch to the end user. Because of this, marketing departments have taken to converting most zoom measurements to 35mm equivalents, even though, aside for those few full-frame DSLRs, there is little true 35mm acquisition taking place any more- especially in the consumer realm.
B&H Photo Video posted a nice article comparing numerous sensor sizes and lens zoom measurements and put all that against an Angle of View (AoV) measurement which makes a lot of sense out of such disparate dumbers. Anyone can spread their arms out in a 90° Angle of View. This is the same for a sub-compact as it is for a DSLR- no matter the individual camera lens measurement in milimeters. A 20x lens is still a 20x lens. Its time we start thinking in new photography terms. Time to ditch the mm and move on to AoV so its easier to explain, and use any sensor and lens in real life.