Superior aspherical optics and 74 single-diopter steps
7 apertures with separates red-free filter.
Suitable for large or small pupils.
incorporates slit aperture,fixation star,
cobalt blue filter and red-free filter for
Lens range: perfect focus even with high refractive errors.
74 single diopter steps
+ in 1 D steps : +1 through +38
– in 1 D steps : -1 through -36