Comparison of Pentax 55mm ƒ/1.4 SDM SMC DA* and Tamron SP AF 60mm ƒ/2.0 Di II LD IF Macro 1:1

Attribute	Tamron SP AF 60mm ƒ/2.0 Di II LD IF Macro 1:1 ×	Pentax 55mm ƒ/1.4 SDM SMC DA* ×
Magnification Ratio (x)	1	0.17
Filter Size (mm)	55	58
Focus Details	Internal, with full-time manual focus override	SDM (supersonic motor), AF/MF switch
Closest Focus (m)	0.23	0.45
Lens Construction	14 elements in 10 groups	9 elements in 8 groups
Length (mm)	80	66
Focal Length (mm)	60.00	55.00
Diaphragm Blades Type	-	rounded
Brand	Tamron	Pentax
Image Circle	Image Circle	APS-C
Name	Tamron SP AF 60mm ƒ/2.0 Di II LD IF Macro 1:1	Pentax 55mm ƒ/1.4 SDM SMC DA*
Weight (g)	400	375
Type	Telephoto Prime Macro	Standard Prime
Notes	Available mounts: Canon, Nikon (with built-in AF motor), Sony; Includes lens hood.	Included Accessories: Lens Hood
APS Equivalent	1.5x: 90mm; 1.6x: 96mm	83mm
Aperture (f)	2.00 - 22.00	1.40 - 22.00
Diaphragm Blades	7	9
Diagonal Angle of View (degree)	26.60	28.60
Diameter (mm)	73	70.5