Long focus optical objective

Claim 1

AN OPTICAL OBJECTIVE OF LONG FOCAL LENGTH AND HIGH RESOLUTION HAVING A RELATIVE APERTURE AT LEAST AS LARGE AS F 2.0 COMPRISING A FRONT AND A REAR GROUP OF OPTICALLY ALIGNED LENSES LYING ON OPPOSITE SIDES OF AN INTERVENING DIAPHRAGM WHICH COOPERATIVELY FORM AN IMAGE, SAID FRONT GROUP INCLUDING A DOUBLE CONVEX LENS I, A DOUBLE CONCAVE LENS II AND A MENISCUS LENS III WHICH IS CONCAVE TOWARD THE REAR, THE SUCCESSIVE AXIAL SPACES FROM THE FRONT TOWARD THE REAR AS FAR AS THE DIAPHRAGM BEING DESIGNATED S1, S2, S3, AND THE FOCAL LENGTHS OF THE LENSES BEING DESIGNATED F(I), F(II), F(III), SAID REAR GROUP INCLUDING A DOUBLE CONVEX LENS IV, A DOUBLE CONCAVE LENS V, A DOUBLE CONVEX LENS VI, AND A FIELD FLATTENING LENS VII, THE FOCAL LENGTHS THEREOF BEING DESIGNEATE RESPECTIVELY F(IV), F(V), F(VI) AND F(VII) AND THE SUCCESSIVE AIRSPACES SURROUNDING THE LENSES OF THE REAR GROUP BETWEEN SAID DIAPHRAGM AND IMAGE BEING S4, S5, S6, S7 AND S8, THE POSITIVE POWER OF SAID REAR GROUP WITHOUT SAID FIELD FLATTENER BEING SUBSTANTIALLY 2.0 TIMES THE POSITIVE POWER OF SAID FRONT GROUP, THE VALUES OF SAID FOCAL LENGTHS AND SPACINGS BEING GIVEN IN THE TABLE OF MATHEMATICAL STATEMENTS HEREBELOW WHEREIN F REPRESENTS THE EQUIVALENT FOCAL LENGTH OF SAID OBJECTIVE, .88F<F(I)<1.08F .94F<-F(II)<1.16F 1.94F<F(III)<2.38F .38F<F(IV)<.48F .51F<-F(V)<.63F 1.02F<F(VI)<1.26F .55F<-F(VII)<.68F .0021F<S1<.0027F .026F<S2<.033F .74F<S3<.92F .15F<S4<.20F .000088F<S5<.00011F .115F<S6<.142F .138F<S7<.170F .08F<S8<.10F