Comparison of Canon EF-S 15-85mm ƒ/3.5-5.6 IS USM and Leica 50mm ƒ/1.4 Summilux-M Asph.

Attribute	Canon EF-S 15-85mm ƒ/3.5-5.6 IS USM ×	Leica 50mm ƒ/1.4 Summilux-M Asph. ×
Notes	EF-S lens mount, exclusively for bodies with APS-C sensors. Image Stabilization up to 4-stops.	Leica M-mount with 6-bit ID bar code; Built-in telescopic lens hood; Available in black (anodized aluminum) or silver (chromed brass).
Magnification Ratio (x)	0.21	0.09
Filter Size (mm)	72	46
Length (mm)	88	52.5
Closest Focus (m)	0.35	0.7
Diagonal Angle of View (degree)	18.40 - 84.50	47.00
Focus Details	Inner focusing; full-time manual focus and USM; AF/MF switch	Manual focus only
Focal Length (mm)	15.00 - 85.00	51.60
APS Equivalent	24 - 136mm	1.33x (M8): 68.6mm
Brand	Canon	Leica
Image Circle	APS-C	35mm
Name	Canon EF-S 15-85mm ƒ/3.5-5.6 IS USM	Leica 50mm ƒ/1.4 Summilux-M Asph.
Weight (g)	575	335
Type	Standard Zoom	Standard Prime
Aperture (f)	3.50 - 38.00	1.40 - 16.00
Diaphragm Blades	7	9
Diaphragm Blades Type	rounded	-
Lens Construction	17 elements in 12 groups, including UD and aspherical elements	8 elements in 5 groups
Zoom System	Rotary	-
Diameter (mm)	82	53.5