Designed for APS-C cameras but with a pro-spec build quality, this sub-£500 optic is a good update to an already popular lens

Product Overview

Overall rating:

91%
Overall score:91%
Value:95%
Performance:90%
Image Quality:90%
Design:90%
Features:90%

Pros:

  • Fast aperture

Cons:

  • Non-internal focusing

Product:

Tamron SP AF 17-50mm f/2.8 XR DI II LD Aspherical (IF)

Manufacturer:

Price as reviewed:

£470.00

Latest Deals From eBay

Loading

Best Prices from Reevoo

Loading

Low-light photography needs two things: a wide maximum aperture giving a bright viewfinder; and image stabilisation for blur-free images at longer exposure times. Tamron’s improved 17-50mm zoom lens packs both of these features into a compact and very competitively priced bundle.

Based on the previous, but still available, 17-50mm f/2.8 XR Di-II lens (which itself holds a WDC Gold Award), the new zoom incorporates Tamron’s three-coil vibration control technology. This has made the lens a little bit bigger but it remains remarkably compact and just heavy enough to suggest a solid build quality. The new lens also has an extra low-dispersion element and an extra aspherical profile for even better aberration control.

Less helpfully, and as was criticised when Tamron’s previous lens was reviewed, the IF mechanism does not disengage from the manual focusing ring in AF mode nor can manual focusing adjustments be applied. This means that fingers have to be kept clear of the focusing ring, which in turn makes it difficult to take a firm grip. For a lens that is otherwise so well-suited to low-light work, this is a notable weakness.

The vibration control mechanism is efficient, but I found it to have an odd jerkiness: this was apparent only on a tiny scale when trying to align the edge of the frame precisely against the edge of a wall, for example, but it was a little bit disconcerting. It is also slightly unnerving to feel the focusing ring so unrestrained in MF mode, given that the rearward zoom ring requires a definite effort to affect rotation. A zoom lock is provided to prevent accidental extension of the lens while it is being carried, but I doubt whether it is really needed.

Automatic focusing is reasonably quiet and an additional but very faint hum can be heard when the vibration control system is active. Both systems are brisk and effective. The focusing mode slider switch is set just above the similar VC switch on the left-hand side of the lens, within easy reach of the user’s left thumb.

The MTF graph peaks above 0.35 cycles-per-pixel but is weaker at full aperture, at minimum focal length and beyond f/22. Even so, across the most commonly used range of apertures Tamron’s new zoom puts in a strong performance. Better still, its pricing is surprisingly competitive for such a well specified lens. 

Tamron SP AF 17-50mm f/2.8 XR DI II LD Aspherical (IF) MTF Chart

Sample images

Verdict

In summary, this is a successful improvement of an already impressive lens but the niggles that were present in the old lens are still here too.

Full Specification

Minimum Aperture:
f/32

Lens Mount:
Canon EF, Nikon F
Filter Thread:
72mm

Image Stabilisation:
Yes
Focus Method:
AF, MF

Number of Diaphragm Blades:
7
Minimum Focus:
29cm

Maximum Magnification:
1:4.8x
Lens Construction:
19 elements in 14 groups

Maximum Aperture:
f/2.8
Weight:
570g

Diagonal Angle of View:
78-31°
Dimensions:
79.6×94.5mm

Focal Length:
17-50mm
Maximum Format Size:
APS-C

  1. 1. Introduction
  2. 2. Sample images
Page 1 of 2 - Show Full List