FOCAL LENGTH: NiSi Close-up lens can make a telephoto lens function as a macro lens with a large working distance. We suggest using it with zoom or prime lenses in the focal length range of 70-300mm.
WORKING DISTANCE: To use close up lens it is important to know the maximal and minimal distances at which you can focus because you will only be able to take a properly focused image within that range
APERTURE: We recommend using the close-up lens on telephoto lenses with an aperture of f8-f16 to achieve the sharped details.