Abstract: A high-aperture objective comprising a first lens L1 with positive refractive power f1 and a second lens L2 with negative refractive power f2, wherein the focal length ratio between the two lenses is in the range of −0.4<(f1/f2)<−0.1 and the total refractive power 1/f1+1/f2 is greater than zero, two positive lenses L3, L4 whose ratio diameter d3, d4 to focal length f3, f4 satisfies the condition greater than 0.3 and less than 0.6:0.3<d3/f3<0.6, 0.3<d4/f4<0.6, a negative lens L5 and a collective lens L6, wherein the negative lens faces the front group and the focal length ratio of L5 and L6 f5/f6 is between −0.5 and −2:−0.5<f5/f6<−2.

Abstract: A high-aperture objective comprising a first lens L1 with positive refractive power f1 and a second lens L2 with negative refractive power f2, wherein the focal length ratio between the two lenses is in the range of −0.4<(f1/f2)<−0.1 and the total refractive power 1/f1+1/f2 is greater than zero, two positive lenses L3, L4 whose ratio diameter d3, d4 to focal length f3, f4 satisfies the condition greater than 0.3 and less than 0.6: 0.3<d3/f3<0.6, 0.3<d4/f4<0.6, a negative lens L5 and a collective lens L6, wherein the negative lens faces the front group and the focal length ratio of L5 and L6 f5/f6 is between −0.5 and −2: −0.5<f5/f6<−2.

Abstract: In a Faraday microscope for examining specimens with stray magnetic fields in a reflected light beam path with a magnetic indicator film arranged in front of the specimen, the influence of the specimen on the indicator film is evaluated with the indicator film arranged as the termination of the microscope objective, the indicator film advantageously being arranged on an optically transparent substrate. The indicator film and substrate are taken into account in the optical calculation of the microscope objective.