Comparison of Pentax SMC P-FA 100mm f/2.8 Macro and Sony SAL-135F28 135mm f/2.8 (T4.5) STF

Attribute	Sony SAL-135F28 135mm f/2.8 (T4.5) STF ×	Pentax SMC P-FA 100mm f/2.8 Macro ×
Notes	Included Accessories: SH0014 Lens Hood	Distance scale, Focus range limiter, Focus clamp screw
Magnification Ratio (x)	0.25	1
Filter Size (mm)	72	58
Focus Details	-	Internal, manual override
Closest Focus (m)	0.87	0.3
Lens Construction	8 elements in 6 groups	9 elements in 8 groups
Length (mm)	99	102
Focal Length (mm)	135.00	100.00
APS Equivalent	202.5mm	150mm
Brand	Sony	Pentax
Image Circle	35mm	35mm
Name	Sony SAL-135F28 135mm f/2.8 (T4.5) STF	Pentax SMC P-FA 100mm f/2.8 Macro
Weight (g)	730	601
Type	Telephoto Prime (Smooth Transition Focus)	Telephoto Prime Macro
Aperture (f)	2.80 - 32.00	2.80 - 32.00
Diaphragm Blades	9	8
Diagonal Angle of View (degree)	18.00	24.50
Diameter (mm)	80	74