Reviews and Problems with Sigma 85mm F1.4 EX DG HSM
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Sigma 85mm f1.4 EX DG HSM
1 July 2012
Excerpt: The Sigma AF 85mm f/1.4 EX DG HSM is a short telephoto lens with a bright f1.4 focal ratio. Announced February 2010, it's the only 85mm large aperture alternative to Nikon or Canon's own primes that offers auto-focus. The short telephoto lenses from Samyang and Zeiss are manual focus only. It is available for Canon, Nikon, Sigma, Sony, and Pentax mounts.
Summary: Sigma has finally delivered an important lens which has been missing from the Pentax lineup for almost a decade: the new 85mm F1.4 EX HSM. Before its release, Pentax owners had to rely on the legacy FA* 85mm F1.4 , or its slightly slower and shorter cousin, the FA 77mm F1.8 Limited . This is exciting news, as the Sigma delivers all the latest technologies for less than the price of a used FA* lens, and makes no sacrifices in optical quality.
Excerpt: The Sigma 85mm f/1.4 EX DG HSM Lens hit the streets with great anticipation and generated many requests for a full review. Reasons for the interest? First, the 85mm focal length is very useful - especially for portraits. Second, the f/1.4 aperture is very wide - allowing 16x as much light into the camera as many consumer zooms at their f/5.6 max 85mm apertures (2x as much light for each stop times 4 stops) with the ability to create a strongly-blurred background.
Sigma 85mm f/1.4 EX DG HSM: A Fast, Full-Frame Prime
1 August 2009
Excerpt: 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.
Sigma AF 85mm f/1.4 EX HSM DG (EOS) - APS-C format Review / Lab Test
8 February 2011
Conclusion: The Sigma AF 85mm f/1.4 EX HSM DG delivers a convincing performance on APS-C DSLRs although it stays somewhat short of the Canon EF 85mm f/1.2 USM L II here. The lens is impressively sharp in the image center - even at f/1.4 - but it's comparatively softer towards the borders/corners here. However, the Sigma is nothing short of excellent in the range between f/2.8 and f/8. Lateral CAs are minimal and not field-relevant. Same goes for image distortions.
Sigma AF 85mm f/1.4 EX DG HSM (EOS) - Review / Lab Test
7 February 2011
Conclusion: It took Sigma quite a while but the Sigma AF 85mm f/1.4 EX DG HSM is finally here - their first ultra-large aperture tele prime lens. It was about time to get some serious competition (with AF) for the Canon EF 85mm f/1.2 USM L II. The Sigma lens is capable of matching the performance of its Canon counterpart although it doesn't beat it. Unsurprisingly it follows the same optical characteristics.
Sigma AF 85mm f/1.4 EX DG HSM (FX) - Review / Test Report
3 February 2011
Conclusion: It took Sigma quite a while but the Sigma AF 85mm f/1.4 HSM EX DG is finally here - their first ultra-large aperture tele prime lens. It shows a performance characteristic that is typical for many lenses in this class, but it does so on a very high level. The image center shows excellent resolution and high contrast at any tested aperture, whereas the borders/corners are fairly soft at large apertures due to coma effects.