Comparison of Canon EF 135mm f/2.8 Soft Focus and Pentax SMC P-D FA 100mm f/2.8 Macro

Attribute	Canon EF 135mm f/2.8 Soft Focus ×	Pentax SMC P-D FA 100mm f/2.8 Macro ×
Brand	Canon	Pentax
Name	Canon EF 135mm f/2.8 Soft Focus	Pentax SMC P-D FA 100mm f/2.8 Macro
Focal Length (mm)	135.00	100.00
Image Circle	35mm	35mm
Diaphragm Blades	6	8
APS Equivalent	216mm	150mm
Focus Details	Inner focusing	-
Length (mm)	98	80.5
Magnification Ratio (x)	0.12	1
Closest Focus (m)	1.3	0.3
Filter Size (mm)	52	49
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diagonal Angle of View (degree)	18.00	24.50
Weight (g)	390	345
Lens Construction	7 elements in 6 groups, including 1 aspherical element; Super Spectra coatings	9 elements in 8 groups
Type	Telephoto Prime Soft Focus	Telephoto Prime Macro
Diameter (mm)	69	67.5