 "Canon EF 100mm f/2.8 Macro USM Lens"@en "Camera Lenses :: Canon Lens - Onestop Digital"@en
"Medium telephoto lens with a macro feature for 1x magnification. Fluctuations in spherical aberrations caused by focusing are suppressed  and high-quality images are obtained at all focusing distances. With eight aperture blades  good background blur is obtained even when the aperture is decreased by one or two stops. A focusing limiter which limits the magnification to 0.25x is built-in.  "@en 
 "EF 50mm f/1.8 II"@en "Canon EF II | Canon Online Store"@en
"Standard & Medium Telephoto Lens"@en 
 Focal Length & Maximum Aperture 50mm 1:1.8 Lens Construction 6 elements in 5 groups Diagonal Angle of View 46° Focus Adjustment Overall linear extension system with Micromotor Closest Focusing Distance 0.45m / 1.5 ft. Filter Size 52mm Max. Diameter x Length, Weight 2.7" x 1.6", 4.6 oz. / 68.2 x 41.0mm, 130g