The utility model discloses a
macro photography optical
system, and particularly relates to the field of
optical imaging, and the
macro photography optical
system comprises a bonding lens, a focusing group lens, a rear focusing lens group and an
image plane lens which are sequentially arranged from the object side to the image side along the
optical axis direction. According to the invention, the spherical lens made of a full-
glass material is adopted, the variable aperture is arranged between the focusing groups and moves along with the focusing groups, the aberration level at each focusing distance is improved and balanced, and the combined balsaming lens has an aberration eliminating function and is fixed relative to an imaging surface; dust,
water vapor and the like are prevented from entering the lens when the focusing group moves, the last lens of the lens group is arranged to be a convex lens, the effects of reducing the main light incident angle of each view field and increasing the back
focal length are finally achieved, the lens group is suitable for a
single lens reflex camera, a micro
single camera and even a film camera, and a good imaging effect is achieved.