21mm f/3.4 ASPH Super-Elmar-M

Leica Order No. - 11145
Production era - 2011-current
Angle of view (diagonal, horizontal, vertical)
- for 35mm (24 x 36 mm) - 91°, 80°, 59°
- for M8 (18 x 27 mm) - 74°, 64°, 46° (Equivalent focal length : approx. 28 mm)
Optical design
- Number of lenses/groups - 8 / 7 - Aspherical surfaces: 2
- Position of entrance pupil - 15.6 mm (related to the first lens surface in light direction)
Distance setting
- Focus range - 0.7 m - ∞
- 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, 9-blade manual diaphragm
- Lowest value - f /16
Bayonet - Leica M quick-change bayonet with 6 bit lens identification bar code for digital M models
Filter mount/Lens hood
- Hood 12465
- Non-rotating
- Female thread - for screw-on filters E46
- Male thread - with stop for lens hood (included in delivery)
Dimension and weight
- Length - ca. 43 /55 mm (with /without Lens hood)
- Largest diameter - approx. 54 mm (early version 52 mm; revised version 54 mm to allow enough clearance)
- Weight - approx. 279 g
Inscription - LEICA SUPER-ELMAR-M 21mm 1 : 3.4 / 21 APSH. E46 4XXXXXX
Source - Manufacturer's Technical Data 21 Jun 2011
Leica Tech Data - 21mm f/3.4 ASPH Super-Elmar-M.pdf - courtesy Summilux.net

Comment

From Erwin Puts Blog "I am asked quite often what three or four lenses I would select that best represent the Leica philosophy. For this moment in time I would propose the following set:

Super-Elmar-M 3.4/21mm ASPH

Summilux-M 1.4/35 mm ASPH (latest version)

Summicron-M 2/75 ASPH

Here are the arguments: . . ."

SN Start	SN End	Product	Year	Total
-4108622	4108934-	Super-Elmar-M ASPH f= 21mm 1:3.4	2011	313+
-4121216	unknown	Super-Elmar-M ASPH f= 21mm 1:3.4	2012	unknown
-unknown	4230826~	Super-Elmar-M ASPH f= 21mm 1:3.4	2013	unknown
TOTAL	ASSIGNED	SERIAL NUMBERS	2011-Current	unknown