58mm High Quality Wideangle Lens, 0.66X
Distortion image at
corners is common with wideangle lenses, but this particular lens is
especially made for Distortion Free based on the sophisticated lens
formula which produces a resolution power of *350-line at
center.
Mounting threads is 58mm.
Front filter size is 72mm.
Nominal
0.66X (Actual 0.66X/diagonal, 0.66X/center).

* MTF 30%. Equivalent to 1890-line/TV(1/4" CCD),2520-line/TV(1/3" CCD).