Lenses

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Jack Neubart Posted: Aug 16, 2013 1 comments
There are two types of fisheye: circular and diagonal. The Rokinon 8mm f/3.5 Aspherical Fisheye Lens is of the diagonal type, delivering a rectangular image with cropped-sensor lenses. The lens I worked with is designed for the Nikon DX (APS-C/cropped) sensor. The APS-C version provides a 180-degree field of view. Other versions are available for other “cropped-sensor” interchangeable-lens cameras, including Micro Four Thirds. My tests were conducted using the Nikon D300.
C.A. Boylan Posted: Jul 18, 2014 0 comments
Tamron recently added the SP 150-600mm f/5-6.3 Di VC USD (A011 for Nikon mount) and the 16-300mm f/3.5-6.3 Di II VC PZD macro (B016 for Canon and Nikon mount) to the lens profile for aberration correction offered for Adobe’s Photoshop CC, Camera Raw and Lightroom 5. The lens profile will be bundled with the Camera Raw 8.5 update and Lightroom 5.5. Customers who use these lenses will be able to utilize the software for easy correction of lens distortion, chromatic aberration and peripheral light fall-off based on design data.
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Jay Abend Posted: Dec 01, 1999 1 comments

When Bob Shell asked me to take a look at Schneider's new line of digital lenses, I said "sure." After all, I'm a fully modern digital photographer, and anything aimed at the digital professional is of great interest to me. When I...

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Peter K. Burian Posted: Jan 01, 2009 0 comments

With the growing popularity of D-SLR cameras with sensors of various sizes, most of the manufacturers are working to expand their line of lenses. As expected, many of the latest products are “digital only”: designed for the majority of D-SLRs with the APS-C or Four Thirds size sensor. But (as specified in the text), some are multi-platform products suitable for all 35mm and digital...

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Jack Neubart Posted: Sep 03, 2013 Published: Aug 01, 2013 0 comments
While the Sigma 150mm f/2.8 lens has been out for a good while we decided to take a closer look at one of the most interesting pro-oriented products in their lineup. One of the key selling points in this lens is built-in optical image stabilization (“OS” in Sigma-speak) to aid in achieving camera-shake-free, handheld exposures. Granted, image stabilization in a macro lens is not the be-all and end-all of successful close-ups, though it sure gives added insurance. And because the Sigma 150mm OS macro is optimized for full-frame D-SLRs, it allows for use at the stated focal length with such cameras and provides even greater effective focal length with APS-C-type SLRs.
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Joe Farace Posted: Apr 15, 2014 Published: Mar 01, 2014 0 comments
Sigma’s 18-35mm f/1.8 DC HSM is part of their DC series of lenses designed for APS-C-sized sensors so the imaging circle is matched to the size of the sensor. For this assignment, I used a Canon EOS 60D with a 22.3x14.9mm sensor, producing an equivalent angle of view of a 28-56mm lens. Shooters of Nikon, Pentax, Sigma, and Sony cameras, the other mounts for which the lens is available, will achieve an angle of view equivalent to 27-52mm. Unlike other lens manufacturers, Sigma priced the different mounts the same ($799) so don’t feel you’re going to be paying a premium for your camera choice. Bucking a trend with camera manufacturers’ lenses, the Sigma 18-35mm f/1.8 DC HSM includes a lens hood at no extra charge.
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Peter K. Burian Posted: Jan 01, 2003 0 comments

Sigma 28-200mm - 28-300mm Macro Lens

Sigma makes numerous lenses, but the "all-purpose" zooms have been the best selling models in their vast line. Replacing the "DL Hyper Zoom" models...

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Peter K. Burian Posted: Nov 01, 1999 0 comments

The single most prolific lens manufacturer these days, Sigma announced a full 10 new lenses this spring, ranging from an 8mm circular fisheye to the new APO 800mm f/5.6EX HSM. This group included the two zooms tested here, both in the affordable category.

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George Schaub Posted: Aug 12, 2013 Published: Jul 01, 2013 0 comments
There’s something about a fixed focal length lens that brings the photographer out in me. It forces me to move in and back from compositions without resorting to a zoom. Yes, there are times when a zoom is most appreciated—especially the fast constant aperture zooms now available—but a prime puts me in a mindset that a zoom has yet to match.
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Steve Bedell Posted: Aug 09, 2012 Published: Jul 01, 2012 1 comments
The Sigma 85mm f/1.4 EX DG HSM lens (average price: $969 on various Internet sites) is designed for full-frame cameras; with an APS-C multiply by your usual factor. At about 25 oz, I’d describe the lens as substantial, but not hefty. One of the reasons for the weight is the build—11 elements in eight groups, including the use of SLD glass, Sigma speak for Special Low Dispersion. The big chunk of glass on the end requires a 77mm filter. As to handling, Sigma has gone from their black “crinkle” finish to a smooth black rubberized finish that feels great to the touch. It’s plastic, not metal, but based on my experience with previous Sigma lenses, I’ve found them to be built to professional standards and can take a lot of abuse.
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Peter K. Burian Posted: Aug 01, 2000 0 comments

Although most photographers tend to discus the big, fast, pro lenses, the vast majority actually sold are affordable zooms. Sigma makes both types, including their latest APO models like the AF 800mm f/5.6EX with Hypersonic autofocus and the modestly...

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Peter K. Burian Posted: Aug 01, 1999 0 comments

As a manufacturer of a wide range of lenses from 8-800mm, Sigma's line also includes true macro lenses for extreme close-up photography. Both of the current models will produce a full life-size rendition of the subject without accessories: the AF...

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Peter K. Burian Posted: May 01, 1999 0 comments

Until recently, most photographers considered a 19mm or 20mm focal length as the ultimate in ultra-wide, but this is rapidly changing. Thanks to the new technologies for making more affordable aspherical elements, much shorter lenses are becoming readily...

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Peter K. Burian Posted: May 01, 2000 0 comments

Sigma AF 70-300mm & APO Macro Super

Sigma's two most successful zooms--70-300mm models with extreme close focusing ability--were recently upgraded and labeled with the "Super" designation. Both...

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Peter K. Burian Posted: 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...

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