Comparison of Canon EF-S 17-55mm f/2.8 IS USM and Samsung 16-50mm ƒ/2-2.8 S ED OIS NX

Attribute	Canon EF-S 17-55mm f/2.8 IS USM ×	Samsung 16-50mm ƒ/2-2.8 S ED OIS NX ×
Aperture (f)	2.80 - 22.00	2.00 - 22.00
Filter Size (mm)	77	72
Notes	Image Stabilization; Included Accessories: Lens Hood EW-83J	Samsung NX Mount; Optical Image Stabilization; Lens hood included; i-Function; Splash and dust proof.
Closest Focus (m)	0.35	0.3
Magnification Ratio (x)	0.17	0.19
Diameter (mm)	83.5	81
Type	Standard Zoom	Standard Zoom
APS Equivalent	27 - 88mm	24.6 - 77mm
Diaphragm Blades	7	9
Image Circle	APS-C	Samsung NX (APS-C)
Focal Length (mm)	17.00 - 55.00	16.00 - 50.00
Brand	Canon	Samsung
Name	Canon EF-S 17-55mm f/2.8 IS USM	Samsung 16-50mm ƒ/2-2.8 S ED OIS NX
Weight (g)	645	622
Diagonal Angle of View (degree)	27.80 - 78.50	31.40 - 82.60
Lens Construction	19 elements in 12 groups	18 elements in 12 groups, including 3 Aspherical, 2 Extra-low Dispersion and 2 Xtreme High Refractive elements
Zoom System	Rotary	Rotary
Length (mm)	110.6	96.5
Diaphragm Blades Type	-	circular
Focus Details	USM with full-time manual focusing	UPSM (Ultra-Precise Stepping Motor), silent autofocusing