can someone explain this numbers please?, what means equivalent?
Focal Length 4.25-42.5mm, 35mm equivalent 30.4-305mm
thanks for your help
closed as off topic by Dr Mayhem, JoshP♦, Travis Dtfsu Crum, Bart Arondson, Eugene S Jun 11 at 7:01
Questions on Audio-Video Production Stack Exchange are expected to relate to audio or video recording and production within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.
From the wikipedia entry on focal length: