The 330 Achromat gives a magnification factor of +3
Marumi Achromat lenses are specially designed not to interfere with camera CCD´s and CMOS sensors. They are designed for use with Digital SLR cameras. Each lens has a special ultra-low reflection coating. This coupled with a black outer edge on the lens significantly reduces glare, ghost imaging and over exposure.
Achromat lenses are available for all Digital SLR camera lenses and are ideal for macro photography - jewellery, nature, small electronics etc.