Tamron B070Z 17-70mm F/2.8 Di III-A VC RXD Stabilized Large Aperture Mirrorless Lens for Landscape, Portrait, Travel (Nikon Z Mount)

Product Specifications:

Brand: Tamron

Model: 17-70mm F/2.8 Di III-A VC RXD (Model B070)

Lens Type: Standard zoom lens for APS-C mirrorless cameras

Focal Length: 17-70mm (equivalent to 25.5-105mm on 35mm full-frame)

Maximum Aperture: F/2.8 (constant throughout zoom range)

Minimum Aperture: F/22

Lens Construction: 16 elements in 12 groups, including GM glass molded aspherical lenses, LD (Low Dispersion) elements, and composite aspherical lenses

Filter Diameter: 67mm (compatible with many Tamron full-frame mirrorless lenses)

Aperture Blades: 9 (rounded aperture blades for smooth bokeh)

Minimum Focusing Distance: 0.19m (wide-angle end), 0.39m (telephoto end)

Maximum Magnification Ratio: Approximately 1:4.8 to 1:5.2

Angle of View: 80° to 23° (wide to telephoto)

Image Stabilization: VC (Vibration Compensation) optical image stabilization

Autofocus: High-speed, quiet RXD (Rapid eXtra-silent Drive) motor suitable for video shooting

Weight: Approximately 540g

Length: 121.3mm (measured from front lens element to mount flange)

Compatible Mounts: Nikon Z mount, Canon RF mount (firmware updates available via Tamron Lens Utility software)

Recommended Use: Landscape, portrait, video, travel, street photography, night scenes

Key Features:

Large constant F/2.8 aperture for excellent low-light performance and shallow depth of field

Versatile 17-70mm zoom range covering wide-angle to telephoto for various shooting scenarios

Close focusing capability with minimum focusing distance of 0.19m for expressive close-up shots and strong background blur

Optical image stabilization (VC) to reduce camera shake

Compact and lightweight design optimized for APS-C mirrorless cameras

Firmware update support via Tamron Lens Utility without camera body connection (desktop version required)

Compatible with 67mm filters, allowing shared use with other Tamron lenses of the same filter size

MTF Performance:

High contrast and resolution at F/2.8 across focal lengths 17mm and 70mm

Maintains image quality from center to edges with strong line resolution at 10 and 30 lines/mm in both radial and tangential directions

Notes:

Length measurement is from front lens element to mount flange

Aperture maintains near-circular shape when stopped down by 2 stops

Specifications, appearance, and functions are subject to change without notice