Sigma 17-70mm Reviews

Darren wrote this at 11:17 am:

I’ve just added a new page of reviews of the Sigma 17-70mm f/2.8-4.5 DC MACRO lens. If you have any links to suggest, please add them to the comments.

Technorati Tags: , ,

PMA 2006 Announcements

Darren wrote this at 7:39 pm:

There have been a lot of interesting announcements coming out of this year’s Photo Marketing Association (PMA) trade show. Rather than clog up this blog with dozens of individual posts, I’ll do one of these catch-all posts every few days.

A good related article is Michael Reichmann’s state-of-the-industry summary A View of the Photographic Industry From 30,000 Feet.


  • Pentaxhas confirmed that the company will unveil a yet to be named Pentax 10 megapixel digital SLR camera body, tentatively scheduled for a formal launch in Autumn 2006.
  • The smc Pentax-DA 21mm F3.2AL Limited is an interchangeable uni-focal wide-angle lens for exclusive use with Pentaxdigital SLR camera bodies. Offering wide-perspective coverage with a 68-degree angle of view (equivalent in focal length to 32mm in the 35mm format, when mounted on a Pentax *ist D series digital SLR camera body), the lens features a Pentax-original KAF lens mount. Pentax has tentatively scheduled the lens launch for June 2006.
  • Pentax also will preview the Pentax 645 medium format digital SLR camera for the first time in the United States. Offering professional-quality digital image reproduction with 18 effective megapixels, a Kodak-developed extra-large CCD image sensor with 18.6 total megapixels (tentative), a Pentax-original 645AF lens mount, the 645 Digital will maintain compatibility with existing smc Pentax 645 interchangeable lenses.
  • Press release at the Pentax site.
  • Photos at DP Review.





  • 30mm F1.4 EX DC HSM for Four Thirds Mount
  • 18-50mm F2.8 EX DC for Four Thirds Mount
  • MACRO 105mm F2.8 EX DG for Four Thirds Mount
  • APO MACRO 150mm F2.8 EX DG HSM for Four Thirds Mount
  • APO 50-500mm F4-6.3 EX DG HSM for Four Thirds Mount
  • details of above lenses at DP Review
  • 70-200 mm F2.8 EX DG Macro – details at DP Review
  • 17-70 mm F2.8 – F4.5 DC Macro – details at DP Review



  • 8.0 GB Professional 90X Compact Flash card

More comprehensive coverage of and commentary on the PMA 2006 announcements can be found at The Luminous Landscape.

Sigma 17-70mm Lens For DSLRs

Darren wrote this at 10:22 am:

Sigma 17-70mm f/2.8-4.5 DC Macro LensSigma has announced a new 17-70mm f/2.8-4.5 zoom lens designed for APS-C reduced-size sensor digital SLRs.

Features include:

  • Minimum focusing distance of 20cm,with an impressive maximum magnification of 1:2.3. at all focal lengths.
  • New design and multi layer lens coating reduce flare and ghosting.
  • Aspherical and SLD lenses offer excellent correction for various aberrations.
  • Large aperture of F2.8 at the wide angle setting.

You can read all about it at the Sigma web site.

Wide Angle Lenses For DSLRs

Darren wrote this at 1:32 pm:

If you shoot with a small-sensor digital SLR (often called “APS-C” sensors) such as the Canon 10D/20D/300D/350D or Nikon D70/D100/D50, you’ve probably already been frustrated by the difficulty of shooting wide angle.

All these cameras have a 1.5x or 1.6x ‘crop factor’ due to the smaller sensor, so your 24mm lens has a field of view equivalent to a 36mm or 38mm lens on a film camera. It’s nice for the bird photographers working at the long end (cheap 300mm lenses become 480mm!), but it sucks for landscape photographers working at the wide end. has a roundup of ultrawide zooms for Canon and Nikon DSLRs that might help you choose a suitable new lens. Although they don’t review each lens, at least it’ll help you figure out what the options are and you can then Google for technical reviews of those lenses that appeal to you.

Sigma Releases New 50-500mm Lens

Darren wrote this at 10:58 pm:

Sigma has released their new APO 50-500mm F4-6.3 EX DG/HSM lens, optimized for use with digital SLR cameras.

High Magnification Zoom Lens with a 10:1 zoom ratio, from 50mm standard to 500mm ultra telephoto focal length range.

For the first time in optical history, this ultra-zoom lens employs a seven-group zoom system, which provides a high magnification. This system ensures a superior level of precision from 50mm standard to 500mm ultra focal length range.

In addition, by utilizing triple-cam Rear Focusing System effectively, high precision is maintained throughout the whole focus length.

See Sigma’s web site for more information.

Sigma 180mm f3.5 APO EX DG HSM

Darren wrote this at 7:16 pm:

Sigma has just announced a new 180mm f/3.5 telephoto macro lens designed specifically for use with digital cameras. It is compatible with Sigma, Canon, Nikon, Pentax and Konica Minolta DSLRs.

Features include:

  • New multi-layer coating for minimising flare and ghost.
  • HSM models ensure fast and silent autofocusing with full- time manual focus override.
  • Accepts both 1.4X and 2X APO EX Tele-Converters.

For more information, see the Sigma press release at DPReview.

The Great DSLR Shoot-Out

Darren wrote this at 12:14 am:

Popular Photography and Imaging has just published The Great DSLR Shoot-Out. They put up nine sub-$2,500 DSLRs head-to-head, comparing features and performance to help you decide which one is right for you.

The cameras reviewed are:

  • Canon EOS 20D
  • Canon EOS 300D (Digital Rebel)
  • Fujifilm Finepix S3 Pro
  • Konica Minolta Maxxum 7D
  • Nikon D70
  • Olympus E-1
  • Olympus Evolt E-300
  • Pentax *ist DS
  • Sigma SD10

The article is in PDF format, so you can print it out and analyse it in detail when shopping for a digital SLR.