What Digital Camera reviews the Vario-Sonnar 24-70mm f/2.8 ZA T* SSM lens on Sony a900...

Product Overview

Overall rating:

92%

Sony Vario-Sonnar 24-70mm f/2.8 ZA T* SSM

Overall score:92%
Value:90%
Image Quality:90%
Performance:95%
Features:90%
Design:95%

Pros:

  • Streamlined design that makes the lens easy to hold

Cons:

  • Stiff zoom ring is uncomfortable for fingertip rotation

Product:

Sony Vario-Sonnar 24-70mm f/2.8 ZA T* SSM Review

Manufacturer:

Price as reviewed:

£1,419.00

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Sony Zeiss Vario-Sonnar 24-70mm f/2.8 ZA T* SSM review

Sony’s top-rank standard zoom comes courtesy of Carl Zeiss and enjoys the same Vario-Sonnar lineage that made the German manufacturer famous throughout the film-camera world. It is also good-looking thanks to a highly streamlined design that features a constant diameter right along the barrel’s length (excluding the mounting flange itself) and a fairly modest length.

The manual-focusing ring is foremost and has a very good feel; the zoom ring is behind and, on the review sample at least, verges on being slightly too heavy to be truly comfortable. AF speed, provided by an aptly-named Super-Sonic Wave Motor, is good and its accuracy is high. Switching between AF and manual-focusing is carried out using a rotating switch that falls right under the user’s left thumb. Sadly, the rotating action is not as easy on the thumb as a simple slide-switch, which is employed by other manufacturers in this application.

Optically, the CZ 24-70mm zoom displays a well-matched set of MTF curves and it appears that Zeiss has gone more for consistency than for a pronounced sweet-spot in image quality. Wide-open and fully-closed resolutions are slightly lower than elsewhere but from f/4 to f/11 the lens stays solidly in the 0.25-0.30 cycles per pixel range at all focal lengths. There is a small amount of chromatic aberration at the 24mm setting, especially towards the edges of the field but this is unlikely to be obtrusive.

Thanks to internal-focusing there is no movement of the front element, nor of the manual-focusing ring, and with only just over 30mm of extension during zooming (despite a continuous forward movement) this is a very compact lens overall. Even more impressive, given its well-contained proportions, is the fact that the Zeiss lens manages to focus slightly closer than competitors from Nikon or Canon’s equivalent zooms.

A classy protective pouch is provided with the lens, as is a petal-shape lens hood.

 

SonyVarioSMTF24-70.jpg

 

Sample images

Verdict

Overall this is a very good-looking lens that produces consistent results right across the range of commonly-used aperture settings, though at a street price of around £1,300 it's not cheap.

Full Specification

Minimum Aperture:
f/22

Filter Thread:
77mm
Lens Mount:
Sony-type

Focus Method:
AF with manual intervention +MF
AF Motor Type:
SSM (Super-Sonic Wave Motor)

Minimum Focus:
0.34
Other:
Fitted with high-torque Super-Sonic Wave Motor.

Lens Construction:
17 / 13
Maximum Aperture:
f/2.8

Weight:
955
35mm Equivalent Focal Length:
24-70mm

Dimensions:
83 x 111
Focal Length:
24-70mm

Maximum Format Size:
Full Frame
Date Introduced:
2009

  1. 1. Sony Zeiss Vario-Sonnar 24-70mm f/2.8 ZA T* SSM review
  2. 2. Sample images
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