Patent ID: 7616384

Claim:
A zoom lens comprising: a first lens group configured to comprise a positive refraction index and to be anchored in place when performing a magnification of an image; a second lens group configured to comprise a negative refraction index a third lens group configured to comprise a positive refraction index; a fourth lens group configured to comprise a positive refraction index; a fifth lens group configured to comprise a negative refraction index; and a sixth lens group configured to comprise a positive refraction index; the first to sixth lens groups being disposed in order along an optical axis from a side nearest to a photographic subject to an imaging site, when magnifying from a wide angle end to a telephoto end, the magnification thereof being performed by moving the second lens group, the fourth lens group, and the fifth lens group, at a minimum; the first lens group whereof including a reflective optical element configured to refract a light path therein; and a magnification to a long focal distance that is even longer than the telephoto end being performed by interposing, at a minimum, one additional lens group comprising a negative refraction index configured to be an additional lens group, between the lens groups of the zoom lens.