Leica Super-Elmar-M 21mm f/3.4 ASPH. specs

Angle of view (diagonal, horizontal, vertical)

For 35mm (24x36mm): 91°, 80°, 59°
For M8 (18x27mm): 74°, 64°, 46° (Equivalent focal lenght : approx. 28mm)

Optical design

Number of lenses/groups: 8 / 7
Aspherical surface: 2
Position of entrance pupil: 15,6mm (related to the first lens surface in light direction)

Distance setting

Focus range: 0,7m - ∞
Scales: Combined meter/feet graduation
Smallest object field: 706 mm x 1059 mm (35mm) / 530 mm x 795 mm (for M8)
Largest reproduction ratio: 1:29,4

Aperture

Setting/Function: With click-stops, half values available, manual diaphragm
Lowest value: 16

Bayonet

Leica M quick-change bayonet with 6 bit lens identification bar code for digital M models

Filter mount/Lens hood

Non-rotating
Female thread for screw-on filters size E46
Male thread with stop for lens hood (included in delivery)

Dimension and weight

Length: ca. 43/55mm (with/without Lens hood)
Largest diameter: approx. 53mm
Weight: approx. 279g