Comparison of Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM and Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary

Attribute	Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary ×	Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM ×
Aperture (f)	3.50 - 22.00	3.50 - 22.00
Filter Size (mm)	72	62
Notes	Image Stabilization; Available OS AF mounts: Canon EF, Nikon F, Sigma SA; Non-OS AF mounts: Sony A, Pentax K	Image Stabilization; Available AF mounts: Sigma, Sony, Nikon, Canon and Pentax.
Closest Focus (m)	0.38	0.35
Magnification Ratio (x)	0.33	0.34
Zoom System	Rotary	Rotary
Type	Standard Zoom	Standard Zoom
APS Equivalent	1.5x: 27 - 450mm; 1.6x: 28.8 - 480mm	1.5x: 27 - 375mm; 1.6x: 28.8 - 400mm
Diaphragm Blades	7	7
Image Circle	Image Circle	Image Circle
Focal Length (mm)	18.00 - 300.00	18.00 - 250.00
Brand	Sigma	Sigma
Name	Sigma 18-300mm f/3.5-6.3 DC Macro OS HSM Contemporary	Sigma 18-250mm f/3.5-6.3 DC Macro OS HSM
Weight (g)	585	470
Diaphragm Blades Type	rounded	rounded
Lens Construction	17 elements in 13 groups, including 1 SLD and 4 FLD elements; Super Multi-Layer Coating	16 elements in 13 groups, including 1 Special Low Dispersion (SLD) and 3 aspherical elements
Diagonal Angle of View (degree)	5.40 - 76.50	5.70 - 69.30
Length (mm)	101.5	88.6
Diameter (mm)	79	73.5
Focus Details	Internal HSM (Hyper Sonic Motor) with AF/MF switch	Internal HSM (Hyper Sonic Motor) with AF/MF switch