Comparison of Sigma 70-300mm f/4-5.6 APO DG and 70-300mm F/4.5-6.3 Di III RXD (Model A047)

Attribute	Sigma 70-300mm f/4-5.6 APO DG ×	70-300mm F/4.5-6.3 Di III RXD (Model A047) ×
Magnification Ratio (x)	0.5	0.11
Filter Size (mm)	58	67
Front Element Rotation	-	-
Closest Focus (m)	0.95	0.8
Diameter (mm)	76.6	77
Type	Telephoto Zoom	Telephoto Zoom
APS Equivalent	1.5x: 105 - 450mm; 1.6x: 112 - 480mm	1.5x: 105 - 450mm
Diagonal Angle of View (degree)	8.20 - 34.30	8.25 - 34.35
Image Circle	35mm	35mm (Full-frame E-Mount)
Focal Length (mm)	70.00 - 300.00	70.00 - 300.00
Brand	Sigma	Tamron
Name	Sigma 70-300mm f/4-5.6 APO DG	70-300mm F/4.5-6.3 Di III RXD (Model A047)
Weight (g)	545	544.3
Notes	Available AF Mounts: Sigma, Canon, Nikon, Sony, Pentax	Available mounts: Sony E-mount; Moisture-Resistant Construction.
Diaphragm Blades	9	7
Aperture (f)	4.00 - 22.00	4.50 - 32.00
Lens Construction	14 elements in 10 groups, including 3 SLD elements	15 elements in 10 groups, including LD (Low Dispersion) lens element; BBAR (Broad-Band Anti-Reflection) Coating
Zoom System	Rotary	Rotary
Length (mm)	122	147.3
Diaphragm Blades Type	-	circular
Focus Details	Inner focusing system	Internal using RXD (Rapid eXtra-silent stepping Drive) autofocus motor