Archivi categoria: Sigma

This is the Power of Sigma’s $60 Lens Dock for Fixing Focus

Sigma’s Art series of lenses are already praised for their image quality and sharpness, but you can hone that sharpness even more by adjusting the focus of your lens using Sigma’s USB Dock. Photographer Kyle Kozinski recently discovered just how much of a difference it can make.

Kozinski noticed that his $799 Sigma 18-35mm f/1.8 Art lens was slightly off in its focusing, so he shelled out $60 for a Sigma USB Dock.

“Everything up to close to infinity was front focusing and then at infinity it was back focusing,” Kozinski writes. After calibrating his lens’ focus with the USB Dock and Sigma Optimization Pro software, Kozinski saw a night and day difference.

Here are two 100% crops from photos shot with the lens before and after calibrating the focus:

As you can see, the lens now focuses correctly on the text found on the side of the drill driver instead of slightly toward the front or back. This tight, accurate focus is especially helpful for things like shooting portraits with a very shallow depth of field, when you want to ensure that your subject’s eyes are tack sharp.

Many modern digital cameras feature a AF Microadjustment feature for fixing similar focusing issues, but Sigma’s system goes a step beyond.

“The dock allows multiple adjustment values over different focal lengths and focusing ranges whereas the micro adjustment is the same value for everything,” Kozinski explains.

You can find more of Kozinski’s work on his website, Facebook, and Instagram.

Image credits: Comparison photos by Kyle Kozinski and used with permission

Sigma to Finally Bring a 70-200mm f/2.8 DG OS Sport Lens in 2017 [CR2]

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Scritto da Canon Rumors

We’re told that a new Sigma 70-200mm f/2.8 DG OS Sport series lens is close to being completed and we should expect to see an announcement sometime in Q3/Q4 of 2017. We’re also told that the new lens won’t come until the latest four are shipping in good quantity, though we don’t yet know the official Read more...

Sigma 85mm f/1.4 Art Beats Sony’s 85 ‘Across the Board’ for $600 Less

Sigma is undoubtedly, tantalizingly on fire. Their Art series lenses consistently undercut and outperform the competition, as they proved yet again by manufacturing an 85mm f/1.4 lens that is not only $600 cheaper than Sony’s top-of-the-line 85mm GM, but according to DPReview, it’s better ‘across the board.’

This news should come as no surprise. Even before DPReview got their mitts on the new lens, the Sigma 85mm Art earned the highest score DxOMark has ever given to a lens, beating even the famous Zeiss Otus.

But DxOMark didn’t pit the lens directly against Sony’s new 85mm GM. DPReview calls that lens “arguably the best modern 85mm F1.4 on the market (behind the manual focus Zeiss Otus, of course)” and so they wanted to see how the new king of sharpness held up against the impressive Sony. They slapped both lenses on a Sony a7R II, and even using a Metabones smart lens adapter to get the Sigma onto a Sony E-Mount camera, Sigma still outperformed the Sony lens in almost every single category.

Here’s how DPR put it in their conclusion:

…the Sigma beat out the Sony in nearly every category. Sharpness, vignetting, distortion and the handling of lateral chromatic aberration (though not LoCA, in harsh lighting situations, wide open) all went to the Sigma. It simply outperformed the Sony across the board.

Read that again, and then consider that the Sigma 85mm f/1.4 art costs $1,200, while the Sony 85mm f/1.4 GM costs $1,800. At that price difference, you could buy the Metabones adapter and still have change left over.

To read DPReview‘s very comprehensive review, click here, and then try your best not to go order this lens ASAP.

Sigma Announces ‘Light Bazooka’ 100-400mm f/5-6.3 Lens

When Sigma calls their new Contemporary 100-400mm f/5-6.3 DG OS HSM a “light bazooka,” we’re not sure which definition of “light” they’re using. But given the lens’ f/5 max aperture and ultra-light construction, we’re going to guess they mean light as in lightweight.

Unlike the other three (very exciting) lenses announced today, the 100-400 is not part of Sigma’s much-adored “Art” line. No, this is a “Contemporary” lens, but that hasn’t stopped Sigma from touting the optical quality they built into the lightweight monster:

With the goal of creating an ultra-telephoto lens that is far more accessible, SIGMA incorporated all of its latest technologies into SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary. With its outstanding combination of optical performance and compactness, this is an ultra-telephoto lens that is a joy to carry and use.

While this is by no means a “small” lens, it is definitely more compact than you might expect from a 100-400mm ultra-telephoto—boasting a 67mmm filter size and weighing in at just 1,160g (2.5 lbs).

The tagline for the lens is “compact packaging with uncompromising image quality.” Sigma claims to have achieved this by using an optical formula made up of 21 elements in 15 groups, including four SLD (Special Low Dispersion) elements and “optimized” power distribution to minimize aberrations.

Users are also treated to a push/pull zoom mechanism in addition to the twisting zoom ring; and, thanks to the lens’ minimum focusing distance of just 1.6m (5.2 feet), the “light bazooka” can double as a macro lens with a maximum magnification ratio of 1:3.8.

This new lens will be available for Canon, Nikon, and Sigma mounts but, like its Art series brethren, it hasn’t been given a price or release date just yet. We’ll be sure to let you know just as soon as the 100-400mm f/5-6.3 Contemporary hits digital shelves.

Photos of 4 New Sigma Lenses Leaked: 3 New Art Lenses Coming Soon

Sigma’s Art line is about to get even better. Photos of four new Sigma lenses have leaked ahead of the CP+ trade show on Thursday: one Contemporary series lens, and three Art lenses that we have a feeling photographers will be tripping over themselves to buy.

The photos in question appeared first on Nokishita, giving us our first glimpse at the long-awaited Sigma 24-70mm f/2.8 Art lens and three more after that: a 14mm f/1.8 Art, 135mm f/1.8 Art, and a 100-400mm f/5.0-6.3 Contemporary lens.

Unfortunately, the leak does not include any specifications or release date info, but Nokishita got their hands on multiple official product photos of each lens, making it likely we’ll see all four announced officially at CP+ later this week. Scroll down to see the unreleased lenses for yourself (bib optional):

Rumors of the 24-70mm f/2.8 and 135mm f/1.8 Art lenses have been swirling for years, and it’s nice to know these long-awaited lenses will soon come to fruition. But even the 14mm f/1.8, which only recently hit the rumor mill, will probably be met with cheers… particularly from the astrophotographers in the audience.

Keep an eye on PetaPixel and we’ll let you know as soon as any of these lenses and the other goodies set to be released at CP+ are officially announced.