Abstract: A high-performance, inexpensive, small-size, and light-weight wide-angle zoom lens suitable for a TV camera is obtained, which comprises, successively from the object side, four groups having positive, negative, negative, and positive refracting powers, respectively, exhibits a half angle of view of about 40 degrees, and favorably corrects aberration. Successively disposed from the object side are a first lens group G.sub.1 having a positive refracting power functioning as a focusing part and comprising six sheets of lenses composed of a concave meniscus lens having a convex face directed onto the object side, a biconcave lens, a biconvex lens, a cemented lens made of concave and convex lenses, and a convex meniscus lens having a convex face directed onto the object side; a second lens group G.sub.2 functioning as a power-changing part and having a negative refracting power; a third lens group G.sub.

Abstract: A photographic lens apparatus secures a sufficiently large back focus while sufficiently distancing the exit pupil position from the image-forming surface. From the object side along an optical axis L, a stop, a first lens, a second lens, a third lens having a meniscus form, and a fourth lens group, in which a lens having a negative refractive power and a lens having a positive refractive power are cemented together to yield a positive refractive power, are successively disposed. Refractive index n.sub.1 and abbe number .nu..sub.1 of the first lens, abbe number .nu..sub.2 of the second lens, radius of curvature r.sub.7 of the surface facing the object and radius of curvature r.sub.8 of the surface facing the image in the third lens, abbe number .nu..sub.4 of the lens having the negative refractive power and abbe number .nu..sub.5 of the lens having the positive refractive power in the fourth lens group, focal length f.sub.