Close Up Lenses
Close Up lenses - B+W close up lenses are available in 5 strengths, with No.1 being the weakest and No.5 the strongest. If necessary you can even combine them for greater effect - if they are combined the stronger lens should be fitted to the camera lens first.
–Close up lenses work by shortening the effective focal length of the lens - meaning that the lens is extended further from the body than it 'should' be and so it will focus closer!
Close up lenses allow you to create great images but in an inexpensive way, like reading glasses, close up lenses move the focus range into the close up zone.