If you have a SLR or DSLR camera and other maker/mount lenses, the Fotodiox Mount Adapters allow you to use your lenses on the film/digital camera body. Sharing lenses has some distinct advantages. Certain prime lens just cant be replaced, and you save cost of purchase lenses. Fotodiox offers a range of adapter from large format to smaller format digital adapters. Adapting larger format lens, i. e. , large format medium format, medium format 35mm, excellent edge-to-edge sharpness; and the smaller 24×36 mm image field helps minimize the effects of lens distortion and aberration.