A "focus free" lens is a lens with small aperture. For 35mm format focus free camera, such as Kodak, Konica Memorysaver etc, the lens is about f8 to f11, enough to cover a great depth of field.(posted 8362 days ago)Camera with 'focus free" lens is not necessarily cheap. For exampe Minox ECX, which has a four element tree group Tessar type lens Minor lens, sells for over $300. And the miniature Leica IIIf camera is nearly $400, focus free lens