Comparison of Olympus 12-100mm ƒ/4 IS Pro M.Zuiko Digital ED and Tamron 28-75mm f/2.8 Di III RXD (Model A036)

Attribute	Tamron 28-75mm f/2.8 Di III RXD (Model A036) ×	Olympus 12-100mm ƒ/4 IS Pro M.Zuiko Digital ED ×
Aperture (f)	2.80 - 22.00	4.00 - 22.00
Diaphragm Blades Type	-	circular
Filter Size (mm)	67	72
Notes	For Sony Full-frame E-mount; Dust and moisture resistant.	VCM image stabilization up to 5 stops at 100mm (6.5 stops with E-M1 II's 5-axis Sync IS); Splash and dust proof
Focus Details	Internal AF with RXD (Rapid eXtra-silent stepping Drive) stepper motor; DMF (Direct Manual Focus) compatible	-
Type	Standard Zoom	Standard Zoom
Diaphragm Blades	9	7
Diameter (mm)	73	77.5
Image Circle	35mm	Image Circle
Focal Length (mm)	28.00 - 75.00	12.00 - 100.00
Brand	Tamron	Olympus
Name	Tamron 28-75mm f/2.8 Di III RXD (Model A036)	Olympus 12-100mm ƒ/4 IS Pro M.Zuiko Digital ED
Weight (g)	550	561
Diagonal Angle of View (degree)	32.20 - 75.40	12.30 - 84.10
Lens Construction	15 elements in 12 groups, including 1 special XLD (eXtra Low Dispersion) element, 1 LD (Low Dispersion) element, 1 GM (Glass Molded Aspherical) eleme	17 elements in 11 groups, including 1 DSA, 3 aspherical, 5 ED, 1 HR and 2 Super HR elements); Z Coating Nano
Zoom System	Rotary	Rotary
Closest Focus (m)	0.19	0.15
35mm Equivalent	-	24 - 200mm
Length (mm)	117.8	116.5
APS Equivalent	42 - 112.5mm	-
Magnification Ratio (x)	0.34	0.3