Comparison of Canon EF-S 15-85mm ƒ/3.5-5.6 IS USM and Leica 50mm f/2 APO-Summicron-M Asph.

Attribute	Canon EF-S 15-85mm ƒ/3.5-5.6 IS USM ×	Leica 50mm f/2 APO-Summicron-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 extendable lens hood.
Magnification Ratio (x)	0.21	0.09
Filter Size (mm)	72	39
Length (mm)	88	47
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	50.00
APS Equivalent	24 - 136mm	1.33x (M8): 66.5mm
Brand	Canon	Leica
Image Circle	APS-C	35mm
Name	Canon EF-S 15-85mm ƒ/3.5-5.6 IS USM	Leica 50mm f/2 APO-Summicron-M Asph.
Weight (g)	575	300
Type	Standard Zoom	Standard Prime
Aperture (f)	3.50 - 38.00	2.00 - 16.00
Diaphragm Blades	7	11
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