Comparison of Nikon 18-135mm f/3.5-5.6G IF-ED AF-S DX Nikkor and Pentax 18-135mm ƒ/3.5-5.6 ED AL [IF] DC WR SMC DA

Attribute	Nikon 18-135mm f/3.5-5.6G IF-ED AF-S DX Nikkor ×	Pentax 18-135mm ƒ/3.5-5.6 ED AL [IF] DC WR SMC DA ×
Aperture (f)	3.50 - 38.00	3.50 - 40.00
Filter Size (mm)	67	62
Notes	DX Nikkor for use with Nikon Digital SLR models only. Included Accessories: HB-32 Hood, CL-0915 Flexible Lens Pouch	Weather-resistant. Included Accessories: Lens Hood
Closest Focus (m)	0.45	0.4
Magnification Ratio (x)	0.24	0.24
Diameter (mm)	73.5	73
Type	Standard Zoom	Standard Zoom
APS Equivalent	27 - 202.5mm	27.5 - 207mm
Diaphragm Blades	7	7
Image Circle	APS-C	APS-C
Focal Length (mm)	18.00 - 135.00	18.00 - 135.00
Brand	Nikon	Pentax
Name	Nikon 18-135mm f/3.5-5.6G IF-ED AF-S DX Nikkor	Pentax 18-135mm ƒ/3.5-5.6 ED AL [IF] DC WR SMC DA
Weight (g)	385	405
Diagonal Angle of View (degree)	12.00 - 76.00	11.90 - 76.00
Lens Construction	15 elements in 13 groups, including 1 ED and 2 aspherical elements	13 elements in 11 groups, including 1 ED ands 2 aspherical elements
Zoom System	Rotary	Rotary
Length (mm)	86.5	76
Diaphragm Blades Type	-	rounded
Focus Details	Internal; AF-S "Silent Wave" motor with full-time manual focus override feature	Internal with "Quick Shift" AF/MF mechanism and DC motor