Comparison of Nikon 180mm f/2.8D ED-IF AF Nikkor and Pentax SMC P-FA 200mm f/2.8 IF

Attribute	Nikon 180mm f/2.8D ED-IF AF Nikkor ×	Pentax SMC P-FA 200mm f/2.8 IF ×
Magnification Ratio (x)	0.15	0.14
Filter Size (mm)	72	77
Focus Details	Internal	Internal
Closest Focus (m)	1.5	1.4
Lens Construction	8 elements in 6 groups, including 1 ED element	9 elements in 8 groups
Length (mm)	145	135
Focal Length (mm)	180.00	200.00
Diagonal Angle of View (degree)	14.00	12.50
Brand	Nikon	Pentax
Image Circle	35mm	35mm
Name	Nikon 180mm f/2.8D ED-IF AF Nikkor	Pentax SMC P-FA 200mm f/2.8 IF
Weight (g)	768	819
Type	Telephoto Prime	Telephoto Prime
Notes	Lens Hood: Built-in; Includes CI-38 Case	Included Accessories: Hood
APS Equivalent	270mm	300mm
Aperture (f)	2.80 - 22.00	2.80 - 32.00
Diaphragm Blades	9	-
Zoom System	n/a	-
Diameter (mm)	79	81