Comparison of Nikon Z 14-30mm f/4 S Nikkor and Tamron SP AF 17-35mm f/2.8-4 Di

Attribute	Nikon Z 14-30mm f/4 S Nikkor ×	Tamron SP AF 17-35mm f/2.8-4 Di ×
Notes	For Nikon Z-mount; Dust- and drip-resistant.	Available mounts: Canon, Minolta-D, Nikon-D, Pentax; Includes petal type lens hood.
Magnification Ratio (x)	0.16	0.19
Filter Size (mm)	82	77
Length (mm)	85	86.5
Closest Focus (m)	0.28	0.3
Diagonal Angle of View (degree)	72.00 - 114.00	63.00 - 104.00
Focus Details	Internal focusing with stepper motor (STM); A/M switch	Internal
Focal Length (mm)	14.00 - 30.00	17.00 - 35.00
APS Equivalent	21 - 45mm	1.5x: 25.5 - 52.5mm; 1.6x: 27.2 - 56mm
Brand	Nikon	Tamron
Image Circle	35mm (Z Mount)	Image Circle
Name	Nikon Z 14-30mm f/4 S Nikkor	Tamron SP AF 17-35mm f/2.8-4 Di
Weight (g)	485	440
Type	Wide Zoom	Wide Zoom
Aperture (f)	4.00 - 22.00	2.80 - 22.00
Diaphragm Blades	7	7
Diaphragm Blades Type	rounded	-
Lens Construction	14 elements in 12 groups, including 4 ED and 4 aspherical elements; Nano Crystal Coat; Flourine coating on front element surface	14 elements in 11 groups, including one Low Dispersion and three aspherical elements
Zoom System	Rotary	Rotary
Diameter (mm)	89	83.2