Comparison of Sony SAL-100M28 100mm f/2.8 Macro and Tamron SP AF 90mm f/2.8 Di Macro 1:1

Attribute	Sony SAL-100M28 100mm f/2.8 Macro ×	Tamron SP AF 90mm f/2.8 Di Macro 1:1 ×
Magnification Ratio (x)	1	1
Filter Size (mm)	55	55
Focus Details	Auto Clutch; Focus Hold; Focus Range Limiter	External focus system, lens length varies while focusing
Closest Focus (m)	0.35	0.29
Lens Construction	8 elements in 8 groups	10 elements in 9 groups
Length (mm)	98.5	97
Focal Length (mm)	100.00	90.00
Diaphragm Blades Type	rounded	-
Brand	Sony	Tamron
Image Circle	35mm	Image Circle
Name	Sony SAL-100M28 100mm f/2.8 Macro	Tamron SP AF 90mm f/2.8 Di Macro 1:1
Weight (g)	505	405
Type	Telephoto Prime Macro	Telephoto Prime Macro
Notes	Included Accessories: SH0007 Lens Hood	Available mounts: Canon, Minolta, Nikon, Pentax; Includes lens hood and case.
APS Equivalent	150mm	1.5x: 135mm; 1.6x: 144mm
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diaphragm Blades	9	9
Diagonal Angle of View (degree)	24.00	27.00
Diameter (mm)	75	71.5