Comparison of Nikon 18-135mm f/3.5-5.6G IF-ED AF-S DX Nikkor and Pentax SMC P-FA 28-105mm f/4-5.6 IF

Attribute	Nikon 18-135mm f/3.5-5.6G IF-ED AF-S DX Nikkor ×	Pentax SMC P-FA 28-105mm f/4-5.6 IF ×
Magnification Ratio (x)	0.24	0.18
Filter Size (mm)	67	62
Focus Details	Internal; AF-S "Silent Wave" motor with full-time manual focus override feature	Internal
Closest Focus (m)	0.45	0.49
Lens Construction	15 elements in 13 groups, including 1 ED and 2 aspherical elements	15 elements in 12 groups
Length (mm)	86.5	74
Focal Length (mm)	18.00 - 135.00	28.00 - 105.00
Diagonal Angle of View (degree)	12.00 - 76.00	23.50 - 75.00
Brand	Nikon	Pentax
Image Circle	APS-C	35mm
Name	Nikon 18-135mm f/3.5-5.6G IF-ED AF-S DX Nikkor	Pentax SMC P-FA 28-105mm f/4-5.6 IF
Weight (g)	385	306
Type	Standard Zoom	Standard Zoom
Notes	DX Nikkor for use with Nikon Digital SLR models only. Included Accessories: HB-32 Hood, CL-0915 Flexible Lens Pouch	-
APS Equivalent	27 - 202.5mm	42 - 157.5mm
Aperture (f)	3.50 - 38.00	4.00 - 22.00
Diaphragm Blades	7	-
Zoom System	Rotary	Rotary
Diameter (mm)	73.5	71