37mm Fisheye Conversion Lens with marco
Features:
Jollystar Optics 37mm 0.25x  lens is a fisheye conversion lens that attaches to the front of an existing lens, to be used with 52mm filter thread lenses or Series 7 adapter rings. It can also be used as a 12.5x Macro lens, by unscrewing the back element, and using that part on its own.
Specifications：
Magnification 0 .25x
Rear Mount Diameter 37mm
Front  Diameter 67mm
In photography, a fisheye conversion lens is a wide-angle lens that takes in an extremely wide, hemispherical image. Originally developed for use in meteorology to study cloud formation and called "whole-sky lenses", fisheye conversion lens quickly became popular in general photography for their unique, distorted appearance. fisheye conversion lens are often used by photographers shooting broad landscapes to suggest the curve of the Earth. Hemispherical photography is used for various scientific purposes to study plant canopy geometry and to calculate near-ground solar radiati