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When the minds at Leica set their sights on innovation, they don't just aim to improve: they aim to set new milestones and create masterpieces of photography. That's exactly what they've done with the Leica Super-APO-Summicron-SL 21 f/2 ASPH. — the world's first APO lens with a 21mm focal length.
Lens system
Number of lenses/assemblies 14/11
Number of aspherical surfaces 3
Position of the entrance pupil before the bayonet 22.9 mm
Focus range 0.21 m to infinity
Focbusing
Setting Choose automatic (Autofocus) or manual mode on the camera
Smallest object field Full-frame: 127 × 191 mm
Largest scale 1:5.3
Aperture
Setting/Function Electronically controlled aperture, setting on the camera, half or third values can also be set
Smallest aperture 22
Bayonet Leica L bayonet fitting with contact strip
Filter thread E67
Lens hood Screw-on (included in the scope of delivery)
Dimensions
Length approx. 102/133 mm (without/with lens hood)
Diameter approx. 73/105 mm (without/with lens hood)
Weight approx. 789/839 g (without/with lens hood)