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Tamron 70-300mm f/4.5-6.3 Di III RXD vs 18-300mm f/3.5-6.3 Di III-A VC VXD

Both are Nikon Z lenses. Here is what actually differs.

Pick the 70-300mm f/4.5-6.3 Di III RXD if

  • You shoot full frame: the 18-300mm f/3.5-6.3 Di III-A VC VXD is made for APS-C

Pick the 18-300mm f/3.5-6.3 Di III-A VC VXD if

  • You need ⅔ stop more light for low light or background blur (f/3.5 vs f/4.5)
  • You want a wider view: 18mm vs 70mm at the wide end
  • You shoot handheld in dim light or video: it has optical image stabilization and the 70-300mm f/4.5-6.3 Di III RXD does not
  • You shoot close-ups: it focuses down to 0.15 m vs 0.8 m
  • You want bigger close-ups: 0.5× vs 0.2× maximum magnification

Spec differences

13 differences
Specifications that differ between the Tamron 70-300mm f/4.5-6.3 Di III RXD and the Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD
70-300mm f/4.5-6.3 Di III RXD 18-300mm f/3.5-6.3 Di III-A VC VXD
Type
Telephoto Zoom
Superzoom
Format
Full frame
APS-C
Focal length
70-300mm
18-300mm
Max aperture
f/4.5
f/3.5 ⅔ stop faster
Weight
580 g
not listed
Length
150.3 mm
not listed
Diameter
77 mm
75.5 mm
Min focus distance
0.8 m
0.15 m closer
Max magnification
0.2×
0.5× larger
Optical design
15 elements / 10 groups
19 elements / 15 groups
Autofocus motor
RXD
VXD
Image stabilization
No
Yes stabilized
Released
2022
2025
5 identical specs hidden: brand, mount, filter thread, aperture blades, weather sealing. Show all
Brand
Tamron both
Mount
Nikon Z both
Filter thread
67 mm both
Aperture blades
7 both
Weather sealing
Yes both

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more reach (400mm) vs 855 g lighter

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wider (16mm) vs more reach (300mm)

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⅓ stop faster vs 50 g lighter

Nikon Nikkor Z 14-30mm F4 S

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wider (14mm) vs ⅓ stop faster

Tamron 70-300mm f/4.5-6.3 Di III RXD

Sigma 16-300mm f/3.5-6.7 DC OS Contemporary vs Tamron 70-300mm f/4.5-6.3 Di III RXD

⅔ stop faster vs 50 g lighter

Sigma 16-300mm f/3.5-6.7 DC OS Contemporary vs Tamron 18-300mm f/3.5-6.3 Di III-A VC VXD

Sigma 16-300mm f/3.5-6.7 DC OS Contemporary: wider (16mm), more blades

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