Sony DT 18-70mm 1:3.5-5.6 review
The DT 18-70mm 1:3.5-5.6 is Sony's standard kit lens supplied with their entry level DSLRs, which they describe as a versatile general purpose lens covering a wide range of applications, and which features aspheric and ED glass lens elements for 'outstanding clarity at all focal lengths'. The 70mm maximum focal length extends further into the classic 'portrait' range compared to the 18-55mm kit lenses typically supplied by other manufacturers, offering a flattering perspective for people pictures. The 'DT' designation stands for 'Digital Technology', and indicates that the lens is optimized for use on cameras with APS-C sized imagers.
This design first saw light of day in July 2005 as the 'Konica Minolta AF DT ZOOM 18-70mm F3.5-5.6(D)', announced to accompany the Konica Minolta Maxxum 5D SLR. Following Sony's acquisition of KM's DSLR business, the lens was soon re-announced in its current Sony incarnation, with presumably only a cosmetic branding makeover (and the thankfully abbreviated name) distinguishing the new version from old.
Sony's plans to target the entry-level DSLR market with their trio of entry-level models in the Alpha 200, 300 and 350 will likely be dependant for success almost as much on the quality of this lens as the capability of the new cameras; so with the likes of Nikon, Canon and Pentax announcing updated kit lenses to accompany their latest 12-14Mp DSLRs, can this comparatively old model still keep up with the megapixel race?
- 27-105mm equivalent focal length range
- F3.5-5.6 maximum aperture
- Alpha mount for Sony and Konica Minolta APS-C DSLRS
Angle of view
The pictures below illustrate the focal length range from wide to telephoto:
|18mm (27mm equivalent)||70mm (105mm equivalent)|
Sony DT 18-70mm 1:3.5-5.6 specifications
|Street price|| US: $190
|Date introduced||July 2005 (Konica Minolta version); June 2006 (Sony version)|
|Maximum format size||APS-C|
|35mm equivalent focal length (APS-C)||27-105mm|
|Diagonal angle of view (APS-C)||76°- 23°|
|Lens Construction||• 11 elements / 9 groups
• 1 aspherical and 1 ED glass element
|Number of diaphragm blades||7|
|Maximum magnification||0.25x at 70mm|
|AF motor type||'Screw drive' from camera body|
|Focus method||Extending front element|
|Filter thread||• 55mm
• Rotates on focus
|Supplied accessories||• Front and rear caps
• Petal-type lens hood PH-RBA 52mm
|Weight||235 g (8.3 oz)|
|Dimensions||66mm diameter x 77mm length
(2.6 x 3.0 in)
|Lens Mount||Sony Alpha / Minolta MA|
* Supplied accessories may differ in each country or area
Foreword / notes
If you're new to digital photography you may wish to read some of our Digital Photography Glossary before diving into this article (it may help you understand some of the terms used).
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Dpreview use calibrated monitors at the PC normal gamma 2.2, this means that on our monitors we can make out the difference between all of the grayscale blocks below. We recommend to make the most of this review you should be able to see the difference (at least) between X,Y and Z and ideally also A, B and C.