United States Patent: 8223437
fresh patent - July, 17 2012
Zoom Ratio = 1.25 - rather strange zoom 16-20 f/4 IMO
According to the present invention, a wide-angle zoom lens system with the following features can be attained:
a miniaturized zoom lens system is attained;
the correcting of aberrations, such as distortion and astigmatism, can be done over the entire zooming range;
aberration fluctuations upon focusing can be reduced by introducing an internal focusing lens arrangement in which the positive second lens group is provided as the focusing lens group; and a short minimum photographing distance is attained.
United States Patent: 7324293
found also 20-38/3.3 zoom...
a high quality retrofocus wide-angle lens system with the following features can be attained:
(i) being thin (miniaturized) in the optical axis direction;
(PANCAKE???)
(ii) coma, distortion and chromatic aberration are suitably corrected; and
(iii) achieving an angle-of-view of approximately 70.degree..
Is it new DA LIMITED???