17-50mm F/2.8 XR Di II SP

Phased Out

Lightweight. Fast. Super Performance

Setting high-performance DSLRs free with SP engineering, strengthened by F/2.8 maximum aperture advantages.
One of two Tamron 17-50mm F/2.8 offerings, the image integrity and compositional options afforded by the SP 17-50mm F/2.8 Di-II’s wide-to-moderate-telephoto zoom characteristics are prized by experienced photographers. Both versions of the SP 17-50mm F/2.8 stem from the long-successful SP 28-75mm F/2.8—originally designed for 35mm film SLRs. Later refined to meet the needs of high-resolution digital SLRs with APS-C-format sensors, and like its further refined variant (the SP 17-50mm F/2.8 XR Di-II VC, model B005), the 17-50mm renders a picture angle range approximating a 26-78mm lens on a full frame DSLR or a 35mm SLR. A fast and constant F/2.8 maximum aperture benefits photographers in several ways, including the ability to render cluttered backgrounds well out of focus, expanded low-light shooting freedom and a brighter viewfinder image. With its mildly less complex optical formula and without tri-axial VC (Vibration Compensation), the SP 17-50mm F/2.8 Di-II (model A16) stands out as a remarkable value and a favorite of passionate photographers.

SKU: 104A16 Category:

Description

Model A16
Lens Construction (Groups/Elements) 13/16
Angle of View 78°45′-31°11′ (APS-C size equivalent)
Diaphragm Blade Number 7
Minimum Aperture F/32
Minimum Focus Distance 10.6in.(0.27m)
Macro Magnification Ratio 1:4.5 (at f=50mm MFD 0.27m)
Filter Diameter ø67
Weight 430g (15.2oz)
Diameter x Length ø2.9 x 3.3in.
(ø74.0 x 81.7mm)
Accessory Flower-shaped lens hood
Mount Canon, Nikon with Built-In Motor, Pentax, Sony A mount

Di-II lenses are performance-engineered expressly for digital SLR cameras with image sensors commonly referred to as APS-C, measuring approximately 24mm x 16mm.

 

Super Performance

Super Performance – Tamron’s Super Performance series delivers a range of lenses that meet the highest standards.

Extra Refractive Index

XR (Extra Refractive Index) Glass – A special glass with a particularly high refractive index for greater performance and a compact lens design.

ASL

ASL – Hybrid aspherical elements ensure unique image quality and compactness.

LD

LD (Low Dispersion) – Lens element for greater image sharpness and the correction of chromatic aberration.

Internal-Focusing (IF)-System

Internal Focusing (IF) System – The extension length of the lens does not change during focussing and the close focussing distance is significantly reduced across the entire focusing range.

Zoom Lock

Zoom Lock (ZL) Mechanism – Protects against undesired extension of the lens barrel.


DA09 Lens Hood for A09 & A16


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