Sigma 28-70mm F2.8 DG DN for L-Mount

Product Information

It will also work with APS-C sensor cameras with an effective increase in focal length to 42-105mm due to the crop factor. That said, the 28-70mm F2.8 Contemporary still offers solid image quality. This is especially true if you're willing to stop down a bit, don't shoot with an extremely high-res body or don't need perfection in the corners. Let's take a closer look.

Sigma teases its upcoming sports focused 70-200mm F2.8 for L Sigma teases its upcoming sports focused 70-200mm F2.8 for L

The L-Mount has a few great portrait options — including Sigma’s 85mm and 105mm F1.4 Art lenses, although these are not mirrorless-specific — but the image quality coming from the Panasonic Lumix S Pro 50mm f/1.4 is simply excellent, if you can afford it. Here’s a photo of the Verrazzano-Narrows Bridge taken with the S1. The focal length was 43mm with the settings being f8 and 100 ISO. In addition to prioritizing portability, SIGMA’s optical engineers introduced a new combination of coatings and structural elements that make this standard zoom well-equipped for use in a wide range of shooting environments. Likewise, the latest production and manufacturing techniques were employed to ensure exceptionally high build quality. This was taken with the Sigma fp L and it’s 61 megapixel sensor. Setting were 100 ISO and f8. The focal length used was 30.5mm.The Sigma 28-70mm F2.8 DG DN Contemporary produces quite nice sunstars when stopped-down to f/16 and f/22, as shown below. The Sigma 20mm F2 DG DN | C joins a growing range of fairly fast primes for Sony E-mount and Leica L-mount cameras in Sigma’s I-series range, which includes the 35mm F2 DG DN | Cand 65mm F2 DG DN | C. There are also 24mm F2 and 45mm F2.8 options in the line-up. The look and feel are virtually identical in each case, with the same ‘Contemporary’ design ethos seeking to deliver excellent performance from a compact and lightweight build. It also offers a dust- and splash- proof construction of the lens mount, a stepping AF motor for fast and quiet autofocusing, and a minimum focusing distance of 19cm (at 28mm) and maximum reproduction ratio of 1:4.6 (at 70mm). The Sigma 28-70mm F2.8 DG DN | Contemporary redefines the standard zoom for mirrorless cameras bycombining outstanding optical performance, an F2.8 constant aperture and a lightweight and compact body. Theopticaldesign of the 28-70mm F2.8 DG DN | C is based on the existing 24-70mm F2.8 DG DN | A, but with a focalrange starting at 28mm,allowing for a significantly smaller and lighterlens bodywhile maintaining superb opticalperformance. It is the smallest and lightest lens in its class*. Remaining true to the Contemporary line's core conceptof maintaining an optimal balance between optical performance and lens size, this new optic delivers professionalquality results in a body small and light enough to take on a casual outing.

L-Mount - Panasonic L-Mount - Panasonic

Sunstars are relatively pleasing, with 18 rays thanks to the nine aperture blades. They're not as tight as they could be – each ray splits and diverges into two rays – and as expected stars on the wide end look better than those on the telephoto end where they can appear a bit 'messy'. Optically, the Sigma 14-24mm f/2.8 DN Art delivers no surprises, living up to the high bar set by other Art-series lenses. Sharpness is solid and chromatic aberration is minor. The distortion that’s near impossible to eliminate at such a wide-angle is subtle and easy to correct in post, with a vignette that’s also easy to remove either in post or by stopping down past f/4. True to the Contemporary line’s core concept, the 28-70mm F2.8 DG DN was developed to offer the right balance of performance and portability. It has been designed to deliver outstanding image quality that rivals SIGMA’s Art line lenses in a body light enough for day-to-day use.We do realise, however, that bokeh evaluation is subjective, so we've included several 100% crops for your perusal. Sharpness

DPReview TV: Sigma 28-70mm F2.8 review DPReview TV: Sigma 28-70mm F2.8 review

Budget alternative: Stepping down to an f/4 lens creates a lot of wiggle room in the budget with optics like the Panasonic Lumix S Pro 70-200mm f/4 OIS. Thanks to Leica and Sigma's participation, L-mount owners already have access to a good number of prime lenses, in addition to those that Panasonic has brought to market.

Introduction

Now for the quality at landscape distances, starting with the lens at 28mm f2.8, and like all my shots in this review, it was taken with the Sony A1 using the default lens corrections, so Shading and Chromatic aberration compensation set to Auto and Distortion set to Off. Sony E-mount shooters also have access to the more affordable Tamron 28–75mm F/2.8 Di III RXD. It's just 16.3mm (0.6in) longer, weighs 80g (2.8oz) more, and gives you a fractionally more powerful 75mm telephoto than the Sigma 28-70mm. It also offers full weather-sealing versus the mount-only sealing of the Sigma 28-70mm F2.8. For one more bokeh comparison, here’s the Sigma 28-70 at 28mm f2.8, as close as it can focus at that focal length, quoted as 19cm. There’s still some texture within the blobs, but it’s still a fairly attractive result and I enjoyed the potential for shallow depth-of-field effects when shooting at close range. Note the lens does become softer in the corners the closer you focus. Budget alternative: The Sigma 35mm f/1.4 DG HSM Art Lens may not be quite as bright, nor as sharp, and it’s not built specifically for mirrorless cameras, but it’s still available in L mount and is a steal for less than a grand. Here’s a 100% crop of the photo above. Notice how you can read even the smallest words in this photo even though they are technically not even the focus points. Keep in mind that this was taken using 640 ISO as well, not 100 ISO.