Comparison of Sigma 50-200mm ƒ/4-5.6 DC OS HSM and 70-300mm F/4.5-6.3 Di III RXD (Model A047)

Attribute	70-300mm F/4.5-6.3 Di III RXD (Model A047) ×	Sigma 50-200mm ƒ/4-5.6 DC OS HSM ×
Aperture (f)	4.50 - 32.00	4.00 - 22.00
Filter Size (mm)	67	55
Notes	Available mounts: Sony E-mount; Moisture-Resistant Construction.	Available AF Mounts: Sigma, Canon, Nikon, Sony, Pentax. Included Accessories: Case, Lens Hood. Optical Stabilization.
Closest Focus (m)	0.8	1.1
Magnification Ratio (x)	0.11	0.22
Diameter (mm)	77	74.4
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	1.5x: 105 - 450mm	1.5x: 75-300mm; 1.6x: 80-320mm
Diaphragm Blades	7	8
Image Circle	35mm (Full-frame E-Mount)	APS-C
Focal Length (mm)	70.00 - 300.00	50.00 - 200.00
Brand	Tamron	Sigma
Name	70-300mm F/4.5-6.3 Di III RXD (Model A047)	Sigma 50-200mm ƒ/4-5.6 DC OS HSM
Weight (g)	544.3	420
Diagonal Angle of View (degree)	8.25 - 34.35	7.10 - 27.90
Lens Construction	15 elements in 10 groups, including LD (Low Dispersion) lens element; BBAR (Broad-Band Anti-Reflection) Coating	14 elements in 10 groups, including 1 SLD element
Zoom System	Rotary	Rotary
Length (mm)	147.3	101.9
Diaphragm Blades Type	circular	-
Focus Details	Internal using RXD (Rapid eXtra-silent stepping Drive) autofocus motor	Internal; HSM with full-time manual override