Comparison of Nikon 35-70mm f/2.8D AF Nikkor and Pentax SMC P-FA 28-70mm f/2.8

Attribute	Pentax SMC P-FA 28-70mm f/2.8 ×	Nikon 35-70mm f/2.8D AF Nikkor ×
Magnification Ratio (x)	0.25	0.25
Filter Size (mm)	67	62
Front Element Rotation	-	-
Closest Focus (m)	0.43	0.28
Lens Construction	14 elements in 11 groups	15 elements in 12 groups
Length (mm)	104	94
Focal Length (mm)	28.00 - 70.00	35.00 - 70.00
Zoom System	Rotary	Push-Pull
Brand	Pentax	Nikon
Image Circle	35mm	35mm
Name	Pentax SMC P-FA 28-70mm f/2.8	Nikon 35-70mm f/2.8D AF Nikkor
Weight (g)	800	675
Type	Standard Zoom	Standard Zoom
Aperture (f)	2.80 - 22.00	2.80 - 22.00
APS Equivalent	42 - 105mm	52 - 105mm
Diagonal Angle of View (degree)	34.50 - 75.00	34.20 - 62.30
Diaphragm Blades	-	7
Notes	Included Accessories: Lens Hood and Case	-
Diameter (mm)	84	71