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10/01/06
 
I've finally completed the Sony A100 review.  It's a long, but interesting one, so check it out here.
 

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Sigma has come out with a few new lenses of interest.  They're a great alternative to factory lenses, and usually much less expensive.
 

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Sigma 10-20mm F/4-5.6 EX DC HSM

  • It covers a superwide angle of view 102.4 to 63.8 (SD format)
  • Approximately 15mm-30mm equiv. on an APS-C digital camera.
  • Three pieces of Special Low Dispersion (SLD) elements and three aspherical lens elements produce top quality optical performance.
  • Inner focusing system ensures the length of the lens remains unchanged whilst controlling aberrations.
  • Equipped with HSM (Hyper Sonic Motor) system
  • Minimum focusing distance of 24cm (9.4") at all focal lengths.
  • Relatively compact, lightweight for an ultra wide-angle zoom lens.
  • MSRP $730  $499 street price.

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Sigma 18-50mm F/2.8 EX DC macro
 
    
  • Minimum focusing distance of 20cm with a maximum magnification of 1:3.
  • Aspherical lenses offer compact and lightweight construction.
  • SLD and ELD glasses offer excellent correction of color aberrations.
  • Price unknown at this time but a guess would be around $500.
  • Great alternative to the cheap "kit" lenses.
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    Sigma 17-70mm F/2.8-4.5 DC macro.
    • Minimum focusing distance of 7.9", maximum magnification of 1:2.3.
    • The new multi layer lens coating and lens design reduce flare and ghosting.
    • Aspherical and SLD lenses, offer excellent correction for various aberrations.
    • The lens offers a large aperture of F2.8 at wide angle.
    • A slightly faster lens than the typical "kit" offerings.
    • MSRP $590  Street price $389