Compact zoom lens

Claim 2

A zoom lens system comprising, in order from the object side, a first convergent lens group, a divergent lens group and a second convergent lens group; said first convergent lens group comprising at least three lenses including at least one negative lens component; said divergent lens group comprising at least three lens components including at least one positive lens component; said second convergent lens group comprising at least two positive lens components and at least two negative lens components with the last lens component being a negative lens the surface of smaller radius of curvature of which is directed to the object; said zoom lens satisfying: ______________________________________ f = 52.03 ˜ 194.00 FNO. 3.4 ˜ 6.1 R.sub.1 365.980 D.sub.1 2.00 N.sub.1 1.83481 ν.sub.1 42.7 R.sub.2 63.150 D.sub.2 3.20 R.sub.3 62.650 D.sub.3 8.04 N.sub.2 1.49700 ν.sub.2 81.3 R.sub.4 -126.230 D.sub.4 0.10 R.sub.5 132.321 D.sub.5 4.11 N.sub.3 1.48749 ν.sub.3 70.2 R.sub.6 -272.005 D.sub.6 variable (9.76 ˜ 42.95) R.sub.7 -210.308 D.sub.7 1.40 N.sub.4 1.77250 ν.sub.4 49.6 R.sub.8 118.902 D.sub.8 3.10 R.sub.9 -44.722 D.sub.9 1.40 N.sub.5 1.75500 ν.sub.5 52.3 R.sub.10 37.350 D.sub.10 3.80 N.sub.6 1.84666 ν.sub.6 23.9 R.sub.11 784.000 D.sub.11 variable (35.61 ˜ 2.42) R.sub.12 125.252 D.sub.12 1.40 N.sub.7 1.63980 ν.sub.7 34.5 R.sub.13 30.750 D.sub.13 5.51 N.sub.8 1.49700 ν.sub.8 81.3 R.sub.14 -87.527 D.sub.14 0.10 R.sub.15 29.210 D.sub.15 5.21 N.sub. 9 1.61800 ν.sub.9 63.4 R.sub.16 142.289 D.sub.16 0.20 R.sub.17 58.125 D.sub.17 2.57 N.sub.10 1.61800 ν.sub.10 63.4 R.sub.18 102.077 D.sub.18 2.60 R.sub.19 -160.000 D.sub.19 1.50 N.sub.11 1.84666 ν.sub.11 23.9 R.sub.20 -700.000 D.sub.20 24.13 R.sub.21 111.400 D.sub.21 3.29 N.sub.12 1.83400 ν.sub.12 37.2 R.sub.22 -66.300 D.sub.22 2.64 R.sub.23 -23.370 D.sub.23 1.50 N.sub.13 1.88300 ν.sub.13 40.8 R.sub.24 -111.400 ______________________________________ f 52.03 80 135 194 ______________________________________ D.sub.6 9.76 22.67 35.47 42.95 D.sub.11 35.61 22.70 9.90 2.42 ______________________________________ f.sub.1 = 2.70F.sub.s |f.sub.2 | = 0.732F.sub.s f.sub.3 = 0.751F.sub.s N.sub.L = 1.88300 ______________________________________ where f is the overall focal length, R i is the radius of curvature of the i-th lens surface, D i is the lens surface interval or lens thickness of the i-th lens surface, N i is the refractive index of the i-th lens at the d-line, and ν i is the Abbe number of the i-th lens.

Claim 3

A zoom lens system comprising, in order from the object side, a first convergent lens group, a divergent lens group and a second convergent lens group; said first convergent lens group comprising at least three lenses including at least one negative lens component; said divergent lens group comprising at least three lens components including at least one positive lens component; said second convergent lens group comprising at least two positive lens components and at least two negative lens components with the last lens component being a negative lens the surface of smaller radius of curvature of which is directed to the object; said zoom lens satisfying: ______________________________________ f = 52.01 ˜ 194.00 FNO. 2.9 ˜ 5.5 R.sub.1 90.698 D.sub.1 2.89 N.sub.1 1.48749 ν.sub.1 70.1 R.sub.2 145.567 D.sub.2 0.10 R.sub.3 120.944 D.sub.3 1.20 N.sub.2 1.63980 ν.sub.2 34.6 R.sub.4 43.381 D.sub.4 9.73 N.sub.3 1.48749 ν.sub.3 70.1 R.sub.5 -138.370 D.sub.5 variable (3.80 ˜ 31.42) R.sub.6 -201.499 D.sub.6 1.20 N.sub.4 1.61800 ν.sub.4 63.4 R.sub.7 19.335 D.sub.7 9.58 N.sub.5 1.63980 ν.sub.5 34.6 R.sub.8 -64.384 D.sub.8 0.12 R.sub.9 -75.274 D.sub.9 1.30 N.sub.6 1.77250 ν.sub.6 49.6 R.sub.10 63.620 D.sub.10 4.15 R.sub.11 -31.785 D.sub.11 1.11 N.sub.7 1.62230 ν.sub.7 53.2 R.sub.12 -112.736 D.sub.12 variable (30.96 ˜ 3.33) R.sub.13 175.956 D.sub.13 1.20 N.sub.8 1.76180 ν.sub.8 27.1 R.sub.14 32.036 D.sub. 14 5.58 N.sub.9 1.61800 ν.sub.9 63.4 R.sub.15 -82.062 D.sub.15 0.14 R.sub.16 25.263 D.sub.16 7.66 N.sub.10 1.61800 ν.sub.10 63.4 R.sub.17 127.432 D.sub.17 0.08 R.sub.18 22.961 D.sub.18 8.38 N.sub.11 1.48749 ν.sub.11 70.1 R.sub.19 -75.531 D.sub.19 2.86 N.sub.12 1.81600 ν.sub.12 46.8 R.sub.20 19.243 D.sub.20 1.92 R.sub.21 40.710 D.sub.21 4.46 N.sub.13 1.72825 ν.sub.13 28.5 R.sub.22 -61.155 D.sub.22 0.10 R.sub.23 -57.625 D.sub.23 11.29 N.sub.14 1.81600 ν.sub.14 46.8 R.sub.24 -28.277 D.sub.24 2.14 R.sub.25 -19.412 D.sub.25 1.20 N.sub.15 1.88300 ν.sub.15 41.0 R.sub.26 -106.468 ______________________________________ f 52.01 70.00 130.00 194.00 D.sub.5 3.80 11.59 24.71 31.42 D.sub.12 30.96 23.16 10.04 3.33 ______________________________________ f.sub.1 = 2.66F.sub.s |f.sub.2 | = 0.65F.sub.s f.sub.3 = 0.65F.sub.s N.sub.L = 1.88300 ______________________________________ where f is the overall focal length, R i is the radius of curvature of the i-th lens surface, D i is the lens surface interval or lens thickness of the i-th lens surface, N i is the refractive index of the i-th lens at the d-line, ν i is the Abbe number of the i-th lens.

Claim 4

A zoom lens system comprising, in order from the object side, a first convergent lens group, a divergent lens group and a second convergent lens group; said first convergent lens group comprising at least three lenses including at least one negative lens component; said divergent lens group comprising at least three lens components including at least one positive lens component; said second convergent lens group comprising at least two positive lens components and at least two negative lens components with the last lens component being a negative lens the surface of smaller radius of curvature of which is directed to the object; said zoom lens satisfying: ______________________________________ f = 52.01 ˜ 194.00 FNO. 2.9 ˜ 5.5 R.sub.1 90.698 D.sub.1 2.89 N.sub.1 1.48749 ν.sub.1 70.1 R.sub.2 145.567 D.sub.2 0.10 R.sub.3 120.944 D.sub.3 1.20 N.sub.2 1.63980 ν.sub.2 34.6 R.sub.4 43.381 D.sub.4 9.73 N.sub.3 1.48749 ν.sub.3 70.1 R.sub.5 -138.370 D.sub.5 variable (3.80 ˜ 31.42) R.sub.6 -201.499 D.sub.6 1.20 N.sub.4 1.61800 ν.sub.4 63.4 R.sub.7 19.335 D.sub.7 9.58 N.sub.5 1.63980 ν.sub.5 34.6 R.sub.8 -64.384 D.sub.8 0.12 R.sub.9 -75.274 D.sub.9 1.30 N.sub.6 1.77250 ν.sub.6 49.6 R.sub.10 63.620 D.sub.10 4.15 R.sub.11 -31.785 D.sub.11 1.11 N.sub.7 1.62230 ν.sub.7 53.2 R.sub.12 -112.736 D.sub.12 variable (30.96 ˜ 3.33) R.sub.13 175.956 D.sub.13 1.20 N.sub.8 1.76180 ν.sub.8 27.1 R.sub.14 32.036 D.sub. 14 5.58 N.sub.9 1.61800 ν.sub.9 63.4 R.sub.15 -82.062 D.sub.15 0.14 R.sub.16 25.263 D.sub.16 7.66 N.sub.10 1.61800 ν.sub.10 63.4 R.sub.17 127.432 D.sub.17 0.08 R.sub.18 22.961 D.sub.18 8.38 N.sub.11 1.48749 ν.sub.11 70.1 R.sub.19 -75.531 D.sub.19 2.86 N.sub.12 1.81600 ν.sub.12 46.8 R.sub.20 19.243 D.sub.20 1.92 R.sub.21 40.710 D.sub.21 4.46 N.sub.13 1.72825 ν.sub.13 28.5 R.sub.22 -61.155 D.sub.22 0.10 R.sub.23 -57.625 D.sub.23 11.29 N.sub.14 1.81600 ν.sub.14 46.8 R.sub.24 -28.277 D.sub.24 2.14 R.sub.25 -19.412 D.sub.25 1.20 N.sub.15 1.88300 ν.sub.15 41.0 R.sub.26 -106.468 ______________________________________ f 52.01 70.00 130.00 194.00 D.sub.5 3.80 11.59 24.71 31.42 D.sub.12 30.96 23.16 10.04 3.33 ______________________________________ f.sub.1 = 2.66F.sub.s |f.sub.2 | = 0.65F.sub.s f.sub.3 = 0.65F.sub.s N.sub.L = 1.88300 ______________________________________ where f is the overall focal length, R i is the radius of curvature of the i-th lens surface, D i is the lens surface interval or lens thickness of the i-th lens surface, N i is the refractive index of the i-th lens at the d-line, ν i is the Abbe number of the i-th lens.

Claim 5

A zoom lens system comprising, in order from the object side, a first convergent lens group, a divergent lens group and a second convergent lens group; said first convergent lens group comprising at least three lenses including at least one negative lens component; said divergent lens group comprising at least three lens components including at least one positive lens component; said second convergent lens group comprising at least two positive lens components and at least two negative lens components with the last lens component being a negative lens the surface of smaller radius of curvature of which is directed to the object; said zoom lens satisfying: ______________________________________ f = 52.01 ˜ 194.00 FNO. 2.9 ˜ 5.8 R.sub.1 106.463 D.sub.1 5.73 N.sub.1 1.48749 ν.sub.1 70.1 R.sub.2 232.301 D.sub.2 0.10 R.sub.3 125.510 D.sub.3 1.60 N.sub.2 1.64769 ν.sub.2 33.8 R.sub.4 43.622 D.sub.4 1.61 R.sub.5 43.955 D.sub.5 10.52 N.sub.3 1.48749 ν.sub.3 70.1 R.sub.6 -128.260 D.sub.6 variable (1.77 ˜ 27.68) R.sub.7 -151.637 D.sub.7 1.40 N.sub. 4 1.64000 ν.sub.4 60.2 R.sub.8 20.251 D.sub.8 9.64 N.sub.5 1.64769 ν.sub.5 33.8 R.sub.9 -57.769 D.sub.9 0.10 R.sub.10 -82.471 D.sub.10 1.30 N.sub.6 1.77250 ν.sub.6 49.6 R.sub.11 65.005 D.sub.11 4.40 R.sub.12 -28.276 D.sub.12 1.30 N.sub.7 1.61720 ν.sub.7 54.0 R.sub.13 -94.640 D.sub.13 variable (27.44 ˜ 1.52) R.sub.14 181.414 D.sub.14 1.20 N.sub.8 1.76180 ν.sub. 8 27.1 R.sub.15 30.521 D.sub.15 6.20 N.sub.9 1.64000 ν.sub.9 60.2 R.sub.16 -81.897 D.sub.16 0.14 R.sub.17 25.123 D.sub.17 7.98 N.sub.10 1.64000 ν.sub.10 60.2 R.sub.18 111.479 D.sub.18 0.10 R.sub.19 23.363 D.sub.19 8.41 N.sub.11 1.48749 ν.sub.11 70.1 R.sub.20 -69.850 D.sub.20 3.43 N.sub.12 1.81600 ν.sub.12 46.8 R.sub.21 19.018 D.sub.21 2.15 R.sub.22 38.478 D.sub.22 5.35 N.sub.13 1.71736 ν.sub.13 29.5 R.sub.23 -62.200 D.sub.23 0.27 R.sub.24 -59.154 D.sub.24 6.61 N.sub.14 1.81600 ν.sub.14 46.8 R.sub.25 -27.907 D.sub.25 2.15 R.sub.26 -18.890 D.sub.26 1.20 N.sub.15 1.88300 ν.sub.15 41.0 R.sub.27 -100.511 ______________________________________ f 52.01 70.00 130.00 194.00 D.sub.6 1.77 9.06 21.36 27.68 D.sub.13 27.44 20.14 7.84 1.52 ______________________________________ f.sub.1 = 2.50F.sub.s |f.sub.2 | = 0.63F.sub.s f.sub.3 = 0.63F.sub.s N.sub.L = 1.88300 ______________________________________ where f is the overall focal length, R i is the radius of curvature of the i-th lens surface, D i is the lens surface interval or lens thickness of the i-th lens surface, N i is the refractive index of the i-th lens at the d-line, and ν i is the Abbe number of the i-th lens.

Claim 6

A zoom lens system comprising, in order from the object side, a first convergent lens group, a divergent lens group and a second convergent lens group; said first convergent lens group comprising at least three lenses including at least one negative lens component; said divergent lens group comprising at least three lens components including at least one positive lens component; said second convergent lens group comprising at least two positive lens components and at least two negative lens components with the last lens component being a negative lens the surface of smaller radius of curvature of which is directed to the object; said zoom lens satisfying: ______________________________________ f = 52.01 ˜ 194.00 FNO. 2.9 ˜ 5.8 R.sub.1 106.463 D.sub.1 5.73 N.sub.1 1.48749 ν.sub.1 70.1 R.sub.2 232.301 D.sub.2 0.10 R.sub.3 125.510 D.sub.3 1.60 N.sub.2 1.64769 ν.sub.2 33.8 R.sub.4 43.622 D.sub.4 1.61 R.sub.5 43.955 D.sub.5 10.52 N.sub.3 1.48749 ν.sub.3 70.1 R.sub.6 -128.260 D.sub.6 variable (1.77 ˜ 27.68) R.sub.7 -151.637 D.sub.7 1.40 N.sub. 4 1.64000 ν.sub.4 60.2 R.sub.8 20.251 D.sub.8 9.64 N.sub.5 1.64769 ν.sub.5 33.8 R.sub.9 -57.769 D.sub.9 0.10 R.sub.10 -82.471 D.sub.10 1.30 N.sub.6 1.77250 ν.sub.6 49.6 R.sub.11 65.005 D.sub.11 4.40 R.sub.12 -28.276 D.sub.12 1.30 N.sub.7 1.61720 ν.sub.7 54.0 R.sub.13 -94.640 D.sub.13 variable (27.44 ˜ 1.52) R.sub.14 181.414 D.sub.14 1.20 N.sub.8 1.76180 ν.sub. 8 27.1 R.sub.15 30.521 D.sub.15 6.20 N.sub.9 1.64000 ν.sub.9 60.2 R.sub.16 -81.897 D.sub.16 0.14 R.sub.17 25.123 D.sub.17 7.98 N.sub.10 1.64000 ν.sub.10 60.2 R.sub.18 111.479 D.sub.18 0.10 R.sub.19 23.363 D.sub.19 8.41 N.sub.11 1.48749 ν.sub.11 70.1 R.sub.20 -69.850 D.sub.20 3.43 N.sub.12 1.81600 ν.sub.12 46.8 R.sub.21 19.018 D.sub.21 2.15 R.sub.22 38.478 D.sub.22 5.35 N.sub.13 1.71736 ν.sub.13 29.5 R.sub.23 -62.200 D.sub.23 0.27 R.sub.24 -59.154 D.sub.24 6.61 N.sub.14 1.81600 ν.sub.14 46.8 R.sub.25 -27.907 D.sub.25 2.15 R.sub.26 -18.890 D.sub.26 1.20 N.sub.15 1.88300 ν.sub.15 41.0 R.sub.27 -100.511 ______________________________________ f 52.01 70.00 130.00 194.00 D.sub.6 1.77 9.06 21.36 27.68 D.sub.13 27.44 20.14 7.84 1.52 ______________________________________ f.sub.1 = 2.50F.sub.s |f.sub.2 | = 0.63F.sub.s f.sub.3 = 0.63F.sub.s N.sub.L = 1.88300 ______________________________________ where f is the overall focal length, R i is the radius of curvature of the i-th lens surface, D i is the lens surface interval or lens thickness of the i-th lens surface, N i is the refractive index of the i-th lens at the d-line, and ν i is the Abbe number of the i-th lens.

Claim 7

A zoom lens system comprising, in order from the object side, a first convergent lens group, a divergent lens group and a second convergent lens group; said first convergent lens group comprising at least three lenses including at least one negative lens component; said divergent lens group comprising at least three lens components including at least one positive lens component; said second convergent lens group comprising at least two positive lens components and at least two negative lens components with the last lens component being a negative lens the surface of smaller radius of curvature of which is directed to the object; said zoom lens satisfying: ______________________________________ f = 51.92 ˜ 194.16 FNO. 4.1 ˜ 4.6 R.sub.1 1424.543 D.sub.1 2.00 N.sub.1 1.83400 ν.sub.1 37.2 R.sub.2 91.344 D.sub.2 3.23 R.sub.3 108.199 D.sub.3 6.60 N.sub.2 1.48749 ν.sub.2 70.1 R.sub.4 -130.636 D.sub.4 0.10 R.sub.5 114.625 D.sub.5 4.90 N.sub.3 1.48749 ν.sub.3 70.1 R.sub.6 -198.474 D.sub.6 variable (4.26 ˜ 46.26) R.sub.7 -191.827 D.sub.7 1.40 N.sub.4 1.77250 ν.sub.4 49.6 R.sub.8 106.316 D.sub.8 4.36 R.sub.9 -49.308 D.sub.9 1.40 N.sub.5 1.78800 ν.sub.5 47.4 R.sub.10 35.107 D.sub.10 5.75 N.sub.6 1.84666 ν.sub.6 23.9 R.sub.11 -16518.160 D.sub.11 variable (35.03 ˜ 3.20) R.sub.12 94.828 D.sub.12 1.40 N.sub.7 1.63980 ν.sub.7 34.5 R.sub.13 28.555 D.sub.13 10.46 N.sub.8 1.49700 ν.sub.8 81.3 R.sub.14 -85.070 D.sub.14 0.10 R.sub.15 28.669 D.sub.15 7.54 N.sub.9 1.68100 ν.sub.9 63.4 R.sub.16 91.643 D.sub.16 0.20 R.sub.17 55.099 D.sub.17 2.86 N.sub.10 1.64000 ν.sub.10 60.1 R.sub.18 74.395 D.sub.18 3.48 R.sub.19 -297.878 D.sub.19 1.80 N.sub.11 1.84666 ν.sub.11 23.9 R.sub.20 509.166 D.sub.20 23.62 R.sub.21 45.494 D.sub.21 4.34 N.sub.12 1.83400 ν.sub.12 37.2 R.sub.22 -138.486 D.sub.22 2.38 R.sub.23 -27.219 D.sub.23 1.50 N.sub.13 1.88300 ν.sub.13 40.8 R.sub.24 334.498 ______________________________________ f 51.92 74.68 128.04 194.16 D.sub.6 4.26 19.92 35.67 46.26 D.sub.11 35.03 25.25 12.05 3.20 ______________________________________ f.sub.1 = 2.77F.sub.s |f.sub.2 | = 0.73F.sub.s f.sub.3 = 0.76F.sub.s N.sub.L = 1.88300 ______________________________________ where f is the overall focal length, R i is the radius of curvature of the i-th lens surface, D i is the lens surface interval or lens thickness of the i-th lens surface, N i is the refractive index of the i-th lens at the d-line, and ν i is the Abbe number of the i-th lens.

Claim 8

A zoom lens system comprising, in order from the object side, a first convergent lens group, a divergent lens group and a second convergent lens group; said first convergent lens group comprising at least three lenses including at least one negative lens component; said divergent lens group comprising at least three lens components including at least one positive lens component; said second convergent lens group comprising at least two positive lens components and at least two negative lens components with the last lens component being a negative lens the surface of smaller radius of curvature of which is directed to the object; said zoom lens satisfying: ______________________________________ f = 51.92 ˜ 194.16 FNO. 4.1 ˜ 4.6 R.sub.1 1424.543 D.sub.1 2.00 N.sub.1 1.83400 ν.sub.1 37.2 R.sub.2 91.344 D.sub.2 3.23 R.sub.3 108.199 D.sub.3 6.60 N.sub.2 1.48749 ν.sub.2 70.1 R.sub.4 -130.636 D.sub.4 0.10 R.sub.5 114.625 D.sub.5 4.90 N.sub.3 1.48749 ν.sub.3 70.1 R.sub.6 -198.474 D.sub.6 variable (4.26 ˜ 46.26) R.sub.7 -191.827 D.sub.7 1.40 N.sub.4 1.77250 ν.sub.4 49.6 R.sub.8 106.316 D.sub.8 4.36 R.sub.9 -49.308 D.sub.9 1.40 N.sub.5 1.78800 ν.sub.5 47.4 R.sub.10 35.107 D.sub.10 5.75 N.sub.6 1.84666 ν.sub.6 23.9 R.sub.11 -16518.160 D.sub.11 variable (35.03 ˜ 3.20) R.sub.12 94.828 D.sub.12 1.40 N.sub.7 1.63980 ν.sub.7 34.5 R.sub.13 28.555 D.sub.13 10.46 N.sub.8 1.49700 ν.sub.8 81.3 R.sub.14 -85.070 D.sub.14 0.10 R.sub.15 28.669 D.sub.15 7.54 N.sub.9 1.68100 ν.sub.9 63.4 R.sub.16 91.643 D.sub.16 0.20 R.sub.17 55.099 D.sub.17 2.86 N.sub.10 1.64000 ν.sub.10 60.1 R.sub.18 74.395 D.sub.18 3.48 R.sub.19 -297.878 D.sub.19 1.80 N.sub.11 1.84666 ν.sub.11 23.9 R.sub.20 509.166 D.sub.20 23.62 R.sub.21 45.494 D.sub.21 4.34 N.sub.12 1.83400 ν.sub.12 37.2 R.sub.22 -138.486 D.sub.22 2.38 R.sub.23 -27.219 D.sub.23 1.50 N.sub.13 1.88300 ν.sub.13 40.8 R.sub.24 334.498 ______________________________________ f 51.92 74.68 128.04 194.16 D.sub.6 4.26 19.92 35.67 46.26 D.sub.11 35.03 25.25 12.05 3.20 ______________________________________ f.sub.1 = 2.77F.sub.s |f.sub.2 | = 0.73F.sub.s f.sub.3 = 0.76F.sub.s N.sub.L = 1.88300 ______________________________________ where f is the overall focal length, R i is the radius of curvature of the i-th lens surface, D i is the lens surface interval or lens thickness of the i-th lens surface, N i is the refractive index of the i-th lens at the d-line, and ν i is the Abbe number of the i-th lens.

Claim 9

The zoom lens of any one of claims 1-3 wherein said first and second convergent lens groups are rigidly coupled mechanically to be movable together.

Claim 10

The zoom lens of claim 4 wherein said first and second convergent lens groups are mechanically movable independently of one another.