Comparison of Pentax SMC P-FA 85mm f/1.4 IF and Tamron 85mm ƒ/1.8 Di VC USD SP (Model F016)

Attribute	Tamron 85mm ƒ/1.8 Di VC USD SP (Model F016) ×	Pentax SMC P-FA 85mm f/1.4 IF ×
Notes	Available mounts: Canon EF, Nikon F, Sony A; Optical Image Stabilization (3.5 stops); Weather resistant; Compatible with TAMRON TAP-in Console	Included Accessories: Hood
Aperture (f)	1.80 - 16.00	1.40 - 22.00
Magnification Ratio (x)	0.14	0.1
Filter Size (mm)	67	67
Type	Telephoto Prime	Telephoto Prime
Closest Focus (m)	0.8	0.85
APS Equivalent	1.5x: 128mm; 1.6x: 136mm	127.5mm
Diaphragm Blades	9	-
Image Circle	35mm	35mm
Focal Length (mm)	85.00	85.00
Brand	Tamron	Pentax
Name	Tamron 85mm ƒ/1.8 Di VC USD SP (Model F016)	Pentax SMC P-FA 85mm f/1.4 IF
Weight (g)	700	618
Diagonal Angle of View (degree)	28.60	28.50
Lens Construction	13 elements in 9 groups, including 1 XLD (Extra Low Dispersion) and 1 LD (Low Dispersion) elements; eBAND and BBAR coatings	8 elements in 7 groups
Diameter (mm)	84.8	79
Length (mm)	91.4	71
Diaphragm Blades Type	rounded	-
Focus Details	Internal; USD (Ultrasonic Silent Drive) with continuous manual focus mechanism	Internal