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Sigma has announced that they have release a firmware update for the Sigma 150-600mm F5-6.3 DG OS HSM | Sports Nikon. This update has “improved the focusing performance of Continuous servo (AF-C) mode.” (source)

To get the update, use software SIGMA Optimization Pro (USB Dock required).


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Sigma 150-600mm f/5-6.3 DG OS HSM S with PL mount. Image credit: Edwin Schouten

Sigma 150-600mm f/5-6.3 DG OS HSM S with PL mount. Image credit: Edwin Schouten

Dutch video experts Ekton have managed to convert the Sigma 150-600mm f/5-6.3 DG OS HSM Sports to Arri PL mount. This tour de force gives video shooters great zoom range and great reach, at a bargain cost — when put into the proper context.

Ekton charges $1,900 for the conversion, which requires heavy surgery: cutting the rear of the lens, replacing the mount and related electronics, and adjusting the back focus to achieve near-parfocal zooming. Of course this is not reversible, and the lens loses its optical stabilization feature in the process.

[Via DSLR News Shooter]


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150-600mm Contemporary and Sports

We received information (thanks) that Adorama is shipping the Nikon-mount 150-600mm Sports, and B&H the Nikon-mount 150-600mm Contemporary.

Going through the various reviews, something stands out: the three 150-600mm f/5-6.3 lenses (Sigma S, Sigma C, Tamron) are very close in the image quality department.

Sample variation, shooting technique and subject distance most definitely favor one or the other. See the dissonance between TDP’s conclusion and Lenstip’s, for instance.

May the high-megapixel Canon 5DS reveal more differences in resolving power between these lenses? I don’t think it will, but we’ll find out soon. In the end, AF and build quality could be the deciding factors.

Note that all listed reviews are made on the Canon platform. The Nikon-mount 150-600mm lenses from Sigma are still not very widespread.

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Sigma 150-600mm f/5-6.3 DG OS HSM Sports & Contemporary mechanical comparison

Sigma 150-600mm f/5-6.3 DG OS HSM Sports & Contemporary mechanical comparison (click for larger)

DC Watch met the developers of the 150-600mm Sports and Contemporary lenses for a long interview. The awkward Google translation (the truth about Sports lenses is at the end of this post) likely made me miss a few bits of info, but here you go nonetheless.

  • Although the two lenses were unveiled at the same time, Sigma took a few extra months to refine the Contemporary version.
  • The extensive use of metal in the S plays a big role in the extra weight (2,860 g) compared to the C (1,930 g), which utilizes more plastic (TSC I guess).
  • The size of the front lens was mostly determined by the position of the diaphragm. The closer to the sensor plane, the larger the front lens has to be, for a given level of peripheral illumination. That’s why the S boasts a larger front element. It’s not a matter of corner resolution.
  • There should not be any noticeable difference in OS effectiveness between the two models. Both incorporate the latest advances in this technology, with just a few differences in how the units are integrated.
  • Following the previous point, Sigma didn’t want to cripple the 150-600mm C, even though it is supposed to be a lower-end lens. In particular, it offers the same feature-rich switch panel as found on the S version.
  • The slit at the base of the C’s lens hood helps eliminate debris and reduce motion when the wind blows, by allowing the air to flow out.

[Source: SIGMA 150-600mm|Sports & Contemporary, at DC Watch]

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Sigma's light hyper telephoto lens

The Nikon-mount and Sigma-mount versions of the Sigma 150-600mm f/5-6.6 DG OS HSM Contemporary will start shipping at the end of May (May 29 in Japan).

Subscribe here (Nikon) or here (Sigma) to be notified when the lens is in stock.

Specs:

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Sigma Gear: Prices & Stock Price/Stock Info as of 05/23/2017 05:02:45 GMT Access Here
Sigma Rumors' Price Guide