Comparison of Zeiss 85mm f/2.4 Loxia 2.4/85 and Pentax SMC P-FA 100mm f/2.8 Macro

Attribute	Pentax SMC P-FA 100mm f/2.8 Macro ×	Zeiss 85mm f/2.4 Loxia 2.4/85 ×
Magnification Ratio (x)	1	0.139
Filter Size (mm)	58	52
Focus Details	Internal, manual override	Manual focus only, with large 220 degree focus throw, engraved distance and DOF scales
Closest Focus (m)	0.3	0.8
Lens Construction	9 elements in 8 groups	7 elements in 7 groups, including 3 anomalous partial dispersion elements; Zeiss T* anti-reflective coating
Length (mm)	102	108
Focal Length (mm)	100.00	85.00
Diaphragm Blades Type	-	rounded
Brand	Pentax	Carl-zeiss
Image Circle	35mm	35mm
Name	Pentax SMC P-FA 100mm f/2.8 Macro	Zeiss 85mm f/2.4 Loxia 2.4/85
Weight (g)	601	594
Type	Telephoto Prime Macro	Telephoto Prime
Notes	Distance scale, Focus range limiter, Focus clamp screw	Sony E-Mount (full frame); Weather-resistant lens mount gasket; Included Accessories: Lens hood, front and rear lens caps, de-click key.
APS Equivalent	150mm	1.5x: 127.5mm
Aperture (f)	2.80 - 32.00	2.40 - 22.00
Diaphragm Blades	8	10
Diagonal Angle of View (degree)	24.50	28.63
Diameter (mm)	74	62.5