can someone explain this numbers please?, what means equivalent?
Focal Length 4.25-42.5mm, 35mm equivalent 30.4-305mm
thanks for your help
From the wikipedia entry on focal length:
Due to the popularity of the 35 mm standard, camera–lens combinations are often described in terms of their 35 mm equivalent focal length, that is, the focal length of a lens that would have the same angle of view, or field of view, if used on a full-frame 35 mm camera. Use of a 35 mm-equivalent focal length is particularly common with digital cameras, which often use sensors smaller than 35 mm film, and so require correspondingly shorter focal lengths to achieve a given angle of view, by a factor known as the crop factor.