Peter K. Burian
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Lenses, Test Reports
Peter K. Burian Jan 01, 1998 0 comments

Although many of Sigma's new lenses incorporate the latest technology and/or premium grade optics, this manufacturer continues to compete aggressively in the market for affordable zoom lenses. In addition to its APO, Aspherical, and HSM series, Sigma...

Lenses, Test Reports
Peter K. Burian Aug 01, 2002 0 comments

Ask any group of professional sports or wildlife photographers to name their favorite lens, and most will mention a "fast" 500mm f/4 model with internal focusing and low dispersion glass elements. Ideal in many respects, such lenses offer several advantages.

Lenses, Test Reports
Peter K. Burian Jun 01, 2001 0 comments

Although 50-105mm focal length macro lenses are by far the most popular, many advanced nature photographers prefer longer lenses. Consequently, many camera manufacturers make a premium grade 180mm or 200mm macro lens. Now Sigma offers one, too...

Peter K. Burian Apr 01, 2004 1 comments

Best known for its vast line of lenses with sophisticated technology, Sigma also manufactures 35mm and digital SLR cameras. Their latest digital SLR, the SD10, is an improved version of the earlier SD9 employing an enhanced Foveon X3 sensor detailed in the...

Lenses, Test Reports
Peter K. Burian Apr 01, 2002 0 comments

The Sigma engineers never seem to take a break, coming up with new lenses with surprising frequency. Late last year, they released two short zooms that certainly attracted a lot of attention. Their AF 15-30mm f/3.5-4.5 EX DG Aspherical boasts the...

Lenses, Test Reports
Peter K. Burian Nov 01, 2004 0 comments

All Photos © 2004 Peter K. Burian, All Rights Reserved

Until recently, only Canon and Nikon offered interchangeable lenses with a camera shake compensating system called Image Stabilizer (IS) and Vibration Reduction (VR), respectively (see the discussion on IS and VR lens technology in our August 2004 issue, or on our website at: www.shutterbug.com).

Lenses
Peter K. Burian Dec 01, 2007 0 comments

Although Sigma released their first lens with a built-in Optical Stabilizer (OS) system in the spring of 2004, the company employed this technology in only one pro-grade lens, the 80-400mm f/4.5-5.6. That has changed with the introduction of a more compact/affordable (digital-only) 18-200mm OS zoom. Sigma will not comment about future plans, but a reliable source indicates that...

Lenses
Peter K. Burian Aug 01, 2007 0 comments

Because most consumers demand very compact, lightweight equipment, the majority of lenses are designed with a relatively small aperture: f/4 to f/5.6, for example. That makes sense because the same focal length with a wide aperture would be larger, heavier, and more expensive due to the oversized optical elements and barrel. Even so, many photo enthusiasts really appreciate an...

Lenses
Peter K. Burian Nov 01, 2006 0 comments

One of the favorite lenses among news photographers, a 70-200mm f/2.8 or 80-200mm f/2.8 zoom also appeals to many serious photo enthusiasts. Although large and heavy, lenses of this type offer several benefits. Their very wide maximum aperture allows for faster shutter speeds than the more typical f/4.5-5.6 zooms, great for low-light or action photography at lower ISOs (film or...

Peter K. Burian Oct 01, 2008 1 comments

First announced as a "product under development" in September 2006, the DP1 finally became available 18 months later and it was worth the wait. Aside from solving some image quality issues, the engineers also modified the specifications, delivering a better camera than we had initially expected. In spite of the compact size, this is not a typical point-and-shoot...