Introduction

The Sigma 28-70mm F2.Eight DG DN Modern lens is a really compact, light-weight commonplace zoom lens for full-frame and APS-C mirrorless cameras. It boasts a continuing F2.Eight most aperture throughout its zoom vary and is offered for each the Sony E-mount, in addition to for Leica, Sigma and Panasonic cameras from the L-mount Alliance.

It is geared toward photographers and videographers who need a shiny walkaround zoom and the bokeh potentialities {that a} vast aperture brings however who don’t need the dimensions, weight and price typical of many F2.Eight zooms. Journey and panorama photographers specifically will discover its modest dimension and weight interesting, and it additionally gives potential as a portrait lens or for video seize.

Out there now, the Sigma 28-70mm F2.Eight DG DN Modern carries an inventory value of $899.

All pictures edited in Adobe Digicam Uncooked 13 with changes restricted to white steadiness, publicity, highlights, shadows, white and black ranges. Sharpening and noise discount at ACR defaults.


Key specs:

  • Mount: E-mount (Sony) or L-mount (Panasonic, Leica, Sigma)
  • Focal size: 28-70mm (42-105mm on APS-C our bodies or with APS-C crop)
  • Aperture vary: F2.8 – F22
  • Stabilization: None
  • Filter thread: 67mm
  • Shut focus: 0.19m (7.5″) vast / 0.38m (15.0″) tele
  • Most magnification: 0.30x (vast) / 0.22x (tele)
  • Diaphragm blades: 9
  • Hood: Included
  • Weight: 470g (1.04 lb)
  • Optical building: 16 components in 12 teams (2 FLD, 2 SLD, Three aspherical)
ISO 100 | 1/320 sec | F8 | 36mm | Panasonic S1R
Photograph by Barney Britton

There are a number of options to the Sigma 28-70mm F2.8, though solely certainly one of these is offered for each the E-mount and L-mount: The Sigma 24-70mm F2.Eight DG DN Artwork. It is priced $200 increased, is 21.4mm (0.8in) longer and totally 75% heavier.

For the added value and heft, the Sigma 24-70mm Artwork gives even higher picture high quality and contains an 11-bladed aperture. It additionally gives a little bit additional wide-angle protection and full climate sealing. When you can stretch your finances a little bit additional, we discover it is a worthwhile selection.

ISO 100 | 1/500 sec | F5.6 | 42mm | Panasonic S1R
Photograph by Barney Britton

Sony E-mount shooters even have entry to the extra inexpensive Tamron 28–75mm F/2.Eight Di III RXD. It is simply 16.3mm (0.6in) longer, weighs 80g (2.8oz) extra, and provides you a fractionally extra highly effective 75mm telephoto than the Sigma 28-70mm. It additionally gives full weather-sealing versus the mount-only sealing of the Sigma 28-70mm F2.8.

But regardless of coming in lighter and smaller than the Sigma, it is $100 cheaper. But when portability is your major concern and you do not want all-weather taking pictures functionality, then the Sigma’s size and weight financial savings are definitely sufficient to be noticeable.

The deep-pocketed and fewer dimension/weight-conscious may additionally need to take into account the Sony FE 24-70 mm F2.Eight GM ($2099.99) for E-mount or the Panasonic Lumix S PRO 24-70mm F2.8 ($2199.99) for L-mount. Each are usually not solely considerably pricier but additionally just a bit bigger and heavier once more even than the Sigma 24-70mm Artwork.

In comparison with…

Sigma 28-70mm F2.Eight DG DN | C Sigma 24-70mm F2.Eight DG DN | Artwork Tamron 28–75mm F/2.Eight Di III RXD

Value (MSRP)

$899 $1099 $799
Mount(s) Leica L and Sony E Leica L and Sony E Sony E
Optical building 16 components, 12 teams 19 components, 15 teams 15 components, 12 teams
Aperture diaphragm 9 blades 11 blades 9 blades
Climate sealed Sure, mount-gasket solely Sure Sure
Minimal focus distance / max magnification 0.19 m (7.5) / 0.30x 0.18 m (7.1) / 0.34x 0.19 m (7.5) / 0.34x
Filter dimension 67mm 82mm 67mm
Diameter x Size
(no hood)
L-mount: 72.2mm x 101.5mm (2.8″ x 4.0″)
E-mount: 72.2mm x 103.5mm (2.8″ x 4.1″)
L-mount: 87.8mm x 122.9mm (3.5″ x 4.8″)
E-mount: 87.8mm x 124.9mm (3.5″ x 4.9″)
73mm x 117.8mm (2.9″ x 4.6″)
Weight 470g (16.6oz) L-mount: 835g (29.5oz)
E-mount: 830g (29.0oz)
550g (19.4oz)

Dealing with

As you would possibly anticipate, the featherweight Sigma 28-70mm F2.8’s physique is predominantly constructed from polycarbonate, though it does nonetheless have a metallic mount and construct high quality is nice. And whereas it is not totally weather-sealed like its nearest rivals, the mount nonetheless features a seal that ought to assist defend your digicam physique from the weather, if not the lens itself.

And since it’s so light-weight, steadiness is excellent. Whatever the mount variant you select, it should not really feel front-heavy on any physique you would possibly need to pair it with.

With no built-in picture stabilization, there are solely three controls in complete: A pair of very good, well-dampened zoom and guide focus rings and a spotlight mode selector change on the left aspect of the barrel.

Up entrance, you may discover 67mm filter threads. That is the identical dimension as utilized by its Tamron rival, whereas the Sigma 24-70mm F2.Eight opts as a substitute for a bigger 82mm filter thread.

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Autofocus and focus respiration

Autofocus comes courtesy of a stepper motor that drives only a single light-weight focusing component, and the result’s swift and silent AF. It takes simply one second to completely rack the autofocus from the 19cm (7.5in) minimal focus distance to infinity at 70mm (0.8s on the vast finish). The linear motors within the Sony 24-70mm F2.Eight GM or Canon’s RF 24-70mm F2.8L could also be a tad sooner, however for many use instances, the Sigma’s autofocus is greater than quick sufficient.

Regardless of its pretty shut focusing distance, this is not a true macro lens. The utmost magnification of 0.30x (1:3.3) happens at wide-angle, and in the event you zoom to the 70mm place, you may want to maneuver again to 38cm (15in) out of your topic, leading to a weaker however nonetheless respectable 0.22x (1:4.6) magnification at telephoto.

ISO 100 | 1/1000 sec | F2.8 | 61mm | Panasonic S1R
Photograph by Barney Britton

By way of video autofocus, the Sigma 28-70mm DG DN has the potential to be a extremely nice possibility. Not solely does it provide silent autofocus drive and really nicely-damped guide focus, however it additionally has nicely managed focus respiration. There’s solely a bit on the 28mm wide-angle finish and little or no in any respect by the point you zoom in to 70mm.

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Picture high quality

Life is all about compromises. With a shiny, steady aperture and minimal dimension and weight being the important thing components of its design, it isn’t shocking in any respect that the Sigma 28-70mm F2.Eight DG DN’s picture high quality cannot fairly compete with bigger, costlier options like Sigma’s personal 24-70mm F2.Eight DG DN Artwork.

That stated, the 28-70mm F2.Eight Modern nonetheless gives stable picture high quality. That is very true in the event you’re keen to cease down a bit, do not shoot with an especially high-res physique or do not want perfection within the corners. Let’s take a more in-depth look.

ISO 100 | 1/80 sec | F4.5 | 49mm | Panasonic S1R
Photograph by Barney Britton

Sharpness

Capturing wide-open at F2.8 (which you may fairly possible need to spend a lot of your time doing in the event you’ve purchased this lens for its shiny most aperture), sharpness could be very acceptable within the heart of the body at 28mm and stays fairly good even when you zoom in to the 70mm telephoto.

Stopping all the way down to F5.6, we see a slight enchancment in sharpness at wide-angle and a much bigger enchancment at telephoto, because the lens is softer vast open at 70mm than it’s at 28mm. You will respect this enchancment in sharpness extra in the event you’re taking pictures with a high-resolution digicam. We examined with each the 42-megapixel Sony A7R III and 47-megapixel Panasonic S1R; with a 24-megapixel physique, that distinction can be a lot much less noticeable.

ISO 100 | 1/500 sec | F2.8 | 58mm | Sony A7R III
Photograph by Chris Niccolls

Sharpness drops off a little bit on the corners on the vast finish at F2.8, however stopping all the way down to F5.6 provides a comparatively flat discipline of focus and improved nook sharpness. That stated, focusing within the nook yields increased nook sharpness than focusing within the heart and stopping down, indicating a curved discipline of focus. Focusing within the nook and stopping down yields even higher nook sharpness, as anticipated. The not-so-flat discipline of focus, a minimum of partially, contributes to the peripheral softness when focusing centrally.

This may be a difficulty in the event you wish to shoot landscapes (or brick partitions) vast open however, virtually talking, stopping down the lens will yield first rate edge sharpness. In the meantime, in the event you want optimum sharpness off-axis, merely use an off-center AF level (moderately than utilizing the ‘focus and recompose’ technique).

Outcomes at 70mm comply with an identical sample, however with softer outcomes general, notably at shut focus distances. Broad open, portraits can typically look a little bit dreamy.

ISO 100 | 1/1250 sec | F5 | 61mm | Panasonic S1R
Photograph by Barney Britton

For many sensible functions, nevertheless, the Sigma 28-70mm is well sharp sufficient. For portrait taking pictures, simply be sure to use an AF level over your topic for focus to beat any points with discipline curvature, as it’s best to with any lens and fashionable autofocus system. And for wide-angle panorama taking pictures, stopping all the way down to F5.6 will assist, and by the point you attain F8 or F11, you may be actually happy with the outcomes.

Vignetting and distortion

In the case of distortion, we have to focus on the Leica L-mount and Sony E-mount variations of the lens individually. That is as a result of in the event you’re an L-mount shooter, distortion is corrected robotically in each JPEG and Uncooked information, however in the event you’re taking pictures Uncooked on the E mount variant on a Sony physique and utilizing Adobe software program, there’s (presently) no correction utilized for distortion.

Distortion is not a difficulty for the L-mount model due to automated correction, however Sony E-mount variants present some barrel distortion at wide-angle and distinguished pincushion at telephoto.

Capturing on a Sony A7R III physique, our samples present some barrel distortion noticeable at wide-angle, which adjustments to develop into fairly distinguished pincushion by telephoto. In contrast, our samples shot on a Panasonic Lumix DC-S1R present virtually no distortion, due to automated correction. Uncooked shooters of any mount who use Seize One have extra choices right here, as it could actually use the embedded distortion correction metadata to right the picture.

Distortion is not a difficulty for the L-mount model due to automated correction, however the Sony E-mount variant reveals some barrel distortion at wide-angle and fairly distinguished pincushion at telephoto.
ISO 100 | 1/2000 sec | F4 | Sony A7R III
Photographs by Chris Niccolls

Vignetting just isn’t a priority for the Sigma 28-70mm F2.8. It is solely actually noticeable at telephoto, and even there may be minor and simply corrected.

Bokeh

There’s each excellent news and dangerous information on the bokeh entrance. The Sigma 28-70mm F2.Eight DG DN’s bokeh has a extremely pleasing, easy look to it, with solely minimal onion ring impact and smoothly-rounded, step-free edges even when stopped all the way down to F4.

For essentially the most half, bokeh could be very pleasing, with solely very slight onion ring and a pleasant, polygon-free form even when stopped all the way down to F4.
ISO 100 | 1/200 sec | F4 | 70mm | Sony A7R III
Photograph by Chris Niccolls

Then again, it is fairly liable to cat’s eye impact when taking pictures wide-open, giving the bokeh extra of a soccer (or for non-People, rugby ball) form the nearer it will get to the corners. And that drawback just isn’t restricted simply to these corners however extends fairly a good distance in direction of the middle of the body.

Whereas out-of-focus highlights begin taking over a football-like form pretty rapidly away as you permit the central area of the body, the excellent news is the impact is pretty modest till you attain the very edges and corners. Right here, the impact just isn’t a lot cats eye as it’s truncation of the optical cone resulting from mechanical obstruction (see the odd shapes within the picture beneath).

Cat’s eye impact is kind of noticeable when taking pictures wide-open and may seem fairly a good distance in direction of the middle of the picture body.
ISO 3200 | 1/80 sec | F2.8 | 70mm | Sony A7R III
Photograph by Chris Niccolls

Stopping down helps considerably, although it would not solely clear up the issue on the extremes of the picture. To be honest, this is a matter with most 24-70mm F2.Eight lenses.

Total, although, we actually loved the Sigma’s skinny depth of discipline and skill to yield delicate backgrounds that assist draw your viewers’ focus to the first topic, particularly for portrait pictures. And the falloff from out-of-focus to in-focus and again once more can be moderately good.

Flare, ghosting and sunstars

The Sigma 28-70mm F2.Eight turns in a good efficiency with regards to ghosting. Even when taking pictures into the solar or with it within the nook of the body, there was solely a little bit ghosting noticeable within the far reverse nook. Nonetheless, flare might be a difficulty, and you may even see a noticeable lack of distinction when taking pictures with a shiny mild supply within the body.

ISO 100 | 1/1600 sec | F2.8 | 70mm | Sony A7R III
Photograph by Chris Niccolls

Sunstars are comparatively pleasing, with 18 rays due to the 9 aperture blades. They don’t seem to be as tight as they may very well be – every ray splits and diverges into two rays – and as anticipated stars on the vast finish look higher than these on the telephoto finish the place they’ll seem a bit ‘messy’.

ISO 100 | 1/40 sec | F16 | 28mm | Sony A7R III
Photograph by Chris Niccolls

Lateral and longitudinal chromatic aberration (fringing)

We did not see any main points with lateral chromatic aberration for this lens. There is a really minute quantity of it, maybe 2-Three pixels vast on a 42MP picture (that is a half a millimeter on a 40″ x 60″ print) that clears up simply in the event you allow CA corrections in-camera or in your Uncooked converter.

There’s just a bit little bit of longitudinal chromatic aberration, seen as coloration fringing, round excessive distinction edges of barely out-of-focus areas, however as you may see within the pattern beneath, it is probably not something to concern your self over. It disappears instantly upon stopping down.

A bit little bit of longitudinal chromatic aberration might be seen as magenta and cyan coloration fringing round excessive distinction edges within the picture above. It is adequately subtle to be a non-issue for essentially the most half, and goes away as you cease down the lens.

ISO 100 | 1/400 sec | [email protected] | 70mm | Panasonic S1R
Photograph by Barney Britton

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Conclusion

What we like What we do not
  • Extraordinarily compact and light-weight
  • Shiny, fixed F2.Eight max aperture
  • Swift, silent autofocus
  • Minimal focus respiration
  • Properly damped focus and zoom rings
  • Pleasing bokeh in most respects
  • Good heart sharpness
  • Resists ghosting and chromatic aberrations nicely
  • Balances nicely even with smaller our bodies
  • Affordably priced
  • Not totally weather-sealed
  • Corners look delicate, particularly at telephoto
  • Shut-up telephoto portraits can seem dreamy resulting from softness
  • Considerably flare-prone in some conditions
  • Susceptible to ‘cat’s eye’ impact when taking pictures wide-open

On the finish of the day, it is necessary to remember the goal buyer when evaluating the Sigma 28-70mm F2.Eight DG DN Modern. Can more cash get you an improve within the picture high quality division? Completely, as all the time. However it’ll additionally come on the extra value of a considerably bigger, heavier lens. If you have to pack it for air journey or carry it with you whereas out climbing or roaming round city on foot, that added dimension and weight can be an obstacle.

ISO 100 | 1/100 sec | F4 | 45mm | Panasonic S1R
Photograph by Barney Britton

Certain, it has some caveats within the picture high quality division. Most notably, nook sharpness is not stellar at telephoto whereas wide-open; close-up telephoto pictures vast open can have a delicate dreamy look, and it is also fairly liable to cat’s eye bokeh impact. However truthfully, relying in your topics, these might not be main considerations for you. And picture high quality is in any other case stable, with excellent sharpness throughout a lot of the focal vary, pleasing bokeh, and good resistance to aberrations and ghosting.

ISO 100 | 1/13 sec | F4.5 | 49mm | Sony A7R III
Photograph by Chris Niccolls

The Sigma 28-70mm F2.Eight can be well-suited to video seize, with swift and silent autofocus and nicely-damped controls, in addition to minimal focus respiration. Its solely different important shortcoming is the shortage of full weather-sealing, one thing supplied by all of its nearest rivals. When you anticipate to shoot rain or shine, which may be a deal-breaker, but when not, then it represents a chance to avoid wasting cash whereas getting higher portability.

When you prioritize outright picture high quality and sturdiness over dimension, weight and price, we would suggest the totally weather-sealed Sigma 24-70mm F2.Eight DG DN Artwork. And for E-mount shooters who’re extra dimension, weight and cost-conscious however who have to shoot whatever the components, the Tamron 28–75mm F/2.Eight Di III RXD additionally gives a compelling various in the event you can stay with its extra distracting bokeh.

On the telephoto finish the utmost magnification ratio is 0.22x. Shut-up topics shot at 70mm can seem delicate and dreamy.

ISO 250 | 1/200 sec | F2.8 | 70mm | Panasonic S1R
Photograph by Barney Britton

But when what you want most of all is portability and also you perceive the compromises vital to attain it, the Sigma 28-70mm F2.Eight DG DN is hands-down the smallest and lightest of the bunch and nonetheless gives stable picture high quality.

It would not damage that it is also among the many most inexpensive F2.Eight full-frame commonplace zoom choices for the E- or L-mounts. For the dimensions, weight and cost-conscious, it is positively worthy of consideration.


DPReview TV evaluate

See what our group at DPReview TV has to say concerning the Sigma 28-70mm F2.Eight DG DN | C.

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Pattern galleries

Please don’t reproduce any of those pictures with out prior permission (see our copyright web page).

Samples shot with the Panasonic S1R

Samples shot with the Sony A7R III

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Scoring

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