Comparison of Zeiss 15mm f/2.8 Milvus 2.8/15 and Zeiss 21mm f/2.8 Milvus 2.8/21

Attribute	Zeiss 15mm f/2.8 Milvus 2.8/15 ×	Zeiss 21mm f/2.8 Milvus 2.8/21 ×
Filter Size (mm)	95	82
Notes	Available lens mounts: Canon EF (ZE), Nikon F (ZF.2); Weather-sealed construction to protect against dust and moisture; Hood and lens caps included.	Available lens mounts: Canon EF (ZE), Nikon F (ZF.2); Weather-sealed construction to protect against dust and moisture; Hood and lens caps included.
Closest Focus (m)	0.25	0.22
Magnification Ratio (x)	0.11	0.2
Type	Wide Prime	Wide Prime
Length (mm)	99	92.5
APS Equivalent	1.5x: 22.5mm; 1.6x: 24mm	1.5x: 31.5mm; 1.6x: 33.6mm
Diagonal Angle of View (degree)	110.00	90.00
Image Circle	35mm	35mm
Focal Length (mm)	15.00	21.00
Brand	Carl-zeiss	Carl-zeiss
Name	Zeiss 15mm f/2.8 Milvus 2.8/15	Zeiss 21mm f/2.8 Milvus 2.8/21
Weight (g)	880	735
Aperture (f)	2.80 - 22.00	2.80 - 22.00
Diaphragm Blades	9	9
Diaphragm Blades Type	rounded	rounded
Lens Construction	15 elements in 12 groups, including 5 Anomalous Partial Dispersion and 2 aspherical elements; Enhanced Zeiss T* anti-reflective coating	16 elements in 13 groups, including 4 Anomalous Partial Dispersion elements; Enhanced Zeiss T* anti-reflective coating
Diameter (mm)	102.3	95.3
Focus Details	Manual focus only	Manual focus only