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Sturdy Workhorse, or One-Trick Pony? Sigma 28-70mm f2.8 Assessment


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The 24-70mm f2.8 lens is a workhorse lens — however it’s a little bit of a Clydesdale. The zoom combined with the brilliant aperture tends to create a heavy lens that’s tough to hold round all day. That’s why Sigma (gasp!) shaved 4 mm off the standard workhorse wide-to-mid to craft the Sigma 28-70mm f2.8. The Sigma 28-70mm f2.8 DG DN Up to date is sort of half the load of the Sony G Grasp and even Sigma’s personal 24-70mm Artwork sequence lens. At 16.6 ounces and $900, the E-Mount lens has a number of benefits earlier than you even take it out of the field.

Moreover these widest 4mm, nevertheless, what else did Sigma reduce to get to such a low weight and worth level? Is the lens nonetheless a workhorse — or a pony? Can the lens actually evaluate to the 24-70mm Artwork lens? The Sigma 28-70mm f2.8 nonetheless pleases with some nice coloration and first rate bokeh however lacks the sting sharpness of pricier, bigger lenses.

Editor’s Observe: Usually, while you’re as genuine and huge as we’re, you’re employed with producers to get merchandise in for overview. However it’s additionally not unusual to listen to threats from manufacturers about altering your protection to one thing extra optimistic, even when it doesn’t deserve it. Regardless of having reviewed the most important database of Sigma prime lenses, Sigma felt we had been too harsh on their merchandise. They haven’t even responded to our final electronic mail. So we requested LensRentals to assist us out. LensRentals, like us, champions authenticity and honesty. We’re elated to have and promote companions like them. And we suggest that if there may be any gear that you just wish to attempt to go verify them out. If you click on our hyperlinks and lease from them, we’ll obtain affiliate commissions. And as all the time, we solely suggest the manufacturers we expect are actually the most effective. As the location’s Editor in Chief, I oversee all the location’s evaluations. When one thing is simply incorrect, we’ll appropriate it. However our reviewers are not often incorrect. And I encourage everybody to lean into their feelings and emotions whereas presenting details. Why am I penning this? As a result of I consider the pictures running a blog world wants this stage of transparency.

Too Lengthy, Didn’t Learn

The Sigma 28-70mm f2.8 Up to date is the light-weight cousin to the Sigma 24-70mm f2.8 Artwork. However, to chop the load almost in half, you lose the widest angle, nook sharpness, full climate sealing, and a few distortion management.

Professionals and Cons


  • Tremendous light-weight
  • Reasonably priced for an f2.8
  • Stunning colours
  • Good bokeh for the zoom class
  • Versatile zoom vary


  • The corners are fairly gentle
  • Reasonable line distortion on the widest angle
  • Occasional autofocus misses in shadows and quick motion
  • The weather-sealing is barely on the mount

Gear Used

I used the E-Mount Sigma 28-70mm f2.8 with the Sony A7 III. As a pattern offered by LensRentals, I used a protecting UV filter with about half the photographs. The lens can be out there in L-mount (not examined).


Is taking 4mm off the focal size of a standard lens modern? I don’t know, however the dimension of this lens nonetheless appears like a step in the appropriate course. It’s lower than two ounces shy of being a complete pound lighter than the Sony 24-70mm f2.8 G Grasp lens. Nonetheless, additionally take into account that the Sony G Grasp lens is absolutely weather-sealed.

Tech Specs

Sigma lists the next tech specs for the 28-70mm f2.8 DG DN Up to date:

  • Lens Building: 12 teams, 16 components (2 FLD components, 2 SLD components, 3 aspherical components)
  • Angle of View: 75.4°~34.3°
  • Variety of Diaphragm Blades: 9 (rounded diaphragm)
  • Minimal Aperture: F22
  • Minimal Focusing Distance: 19 (W)-38 (T)cm / 7.5(W)-15 (T)in.
  • Most Magnification Ratio: 1:3.3 (W) – 1:4.6 (T)
  • Filter dimension: φ67mm
  • Dimensions (Diameter × Size)
    • L-Mount: φ72.2mm×101.5mm / φ2.8in.×4.0in.
    • Sony E-Mount: φ72.2mm×103.5mm / φ2.8in.×4.1in.
  • Weight
    • L-Mount: 470g / 16.6oz.
    • Sony E-Mount: 470g / 16.6oz.
  • Lens Hood (LH706-01) provided


The Sigma 28-70mm f2.8 is a lens that feels made for mirrorless. By slicing off 4mm on the wide-angle, Sigma crafts a workhorse lens that doesn’t really feel like a workhorse. It’s almost half the load of Sony’s 24-70mm G Grasp at 14.6 ounces lighter. It’s nonetheless smaller than the Sigma 24-70mm f2.8 Artwork lens at 12.8 ounces lighter. I take advantage of a 24-70mm f2.8 on a DSLR taking pictures weddings and by the tip of the day, I’m sore. I’m jealous of how gentle this lens feels.

Whereas gentle, the 28-70mm nonetheless feels nice within the fingers. The zoom has a reasonably typical set-up with two management rings and a spotlight swap. The front-most ring, for focus, is narrower with a finer texture. The second ring, the zoom, is bigger with a barely totally different texture. I’m accustomed to a a lot bigger zoom, so I reached for the incorrect ring a couple of occasions earlier than retraining my reflexes for a shorter optic.

The one management in addition to the 2 rings is the auto to guide focus swap. I did by chance pull the swap when pulling this lens out of my bag as soon as. Learners will wish to familiarize themselves with that swap to troubleshoot if the lens all of a sudden doesn’t focus. There’s no focal size scale, however Sony’s personal 24-70mm G Grasp doesn’t have one both. (It does, nevertheless, have a shortcut button, although loads of photographers by no means use this characteristic).

The lens has a flat entrance that accepts 67mm filters. It ships with a plastic lens hood.

Construct High quality

The Sigma 28-70mm f2.8 is mud and splash-resistant solely on the mount, with a coating on the entrance to assist repel water and oil. For all intents and functions, it’s best to actually watch out with this lens. Regardless of that, I gave it splash with some soiled river water and the lens and digicam saved taking pictures.

I did, nevertheless, accumulate some particles on the sensor of the a7 III whereas utilizing the lens. Was it a results of the splash? Did it blow in whereas altering lenses? Or is that weather-sealing on the mount imperfect? I can’t say with 100% certainty. I did clear the sensor and take the digicam again outdoors, shot for a bit, and left the lens mounted for 12 hours. I didn’t get any particles on the sensor that point. It’s tough to say if the soiled sensor was the fault of Sigma — or Sony. We’ve used Sony’s absolutely weather-sealed lenses on the a7 III and ended up with soiled sensors, so it’s actually attainable — and perhaps even doubtless — that Sony is the responsible occasion right here.

This lens’ objective in life is to be gentle. There’s a little bit of a plastic really feel to it, particularly when in comparison with the texture of a completely weather-sealed lens. It’s actually not horrible, however it’s no Sony G Grasp both.


(You possibly can see the spot from the soiled sensor within the nook of this shot.)

For motion, the Sigma lens was barely slower than different lenses that I’ve used with the a7 III. With this physique, I count on a 15 % miss fee. With this lens, topics at a working tempo missed 20 to 25 % of the time. This was in steady autofocus, with eye AF on. It’s not too far off from what I’d count on, however in order for you the quickest autofocus efficiency, you’re going to need a Sony or Tamron.

The Sigma 28-70mm f2.8 didn’t throw out any main autofocus purple flags as I used to be working with the lens. My portrait and lifestyle-type photographs had been seldom gentle and I not often appeared to have to attend for the lens to lock focus. Even in restricted gentle, the lens locked on shortly.

The opposite situation that actually examined this Sigma’s autofocus was backlighting. I might deal with the well-lit facet of the face simply superb. Within the shadows, nevertheless, the lens did extra looking backwards and forwards. Left on steady autofocus, the main focus jittered out and in on the shadowy eye, however locked in place and stayed there on the facet that had some gentle reflecting again  In a black silhouette, the point of interest will should be positioned on the sting of the topic. However, that’s no shock, mirrorless techniques have a tendency to want not less than a bit little bit of distinction within the space of the point of interest.

The lens can focus as 7.5 inches from the entrance of the lens. That, after all, isn’t macro, however it’ll enable for some good close-up portraits and dealing with some smaller objects.

As a funds workhorse lens, the autofocus isn’t unhealthy. I’ve seen higher, however you solely lose perhaps 10 % in comparison with different lenses. The situations that missed the mark are the hardest photographs — backlight shadows and motion heading straight in the direction of the digicam. In actual life photographs, while you’re not deliberately taking pictures probably the most tough topics, you’ll get a bit higher hit fee.

Ease of Use

With minimal controls and an affordable worth, this zoom lens goes to be beloved amongst learners. There are simply two dials and an autofocus swap to learn to use. Learners will wish to familiarize themselves with the main focus swap, in case they by chance regulate it within the bag. The easy controls and lower cost level goes to make this lens choice for newbies.

Picture High quality

Did Sigma reduce off extra than simply 4mm to get to a extra compact, reasonably priced workhorse zoom? The Sigma 28-70mm f2.8 has pretty deep, usually golden colours. Plus, on the lengthy finish, photographers will get some nice, gentle bokeh. However, the sides aren’t sharp in any respect and there’s some barrel distortion and vignetting to take care of.


The bokeh from this lens doesn’t appear like it’s coming from a budget-friendly zoom. For those who use the total size of the lens and get in shut, the topic actually pops off a pleasant gentle background. In fact, it’s nothing like a brighter prime, however it’s fairly good for the class.

Bokeh balls are additionally straightforward to create. And, the issues that many photographers complain about aren’t there. There’s no onion ring or cleaning soap bubble impact. Bokeh has good gentle edges.


On the middle, the lens will get some nice sharpness. It has that supreme stability the place the eyes are sharp, however you don’t see each single pore.

However, wanting on the edges and corners, it’s a unique story. The perimeters are fairly gentle, each on the extensive finish, the telephoto and at 50mm. For those who go outdoors of these Rule of Thirds strains, the topic goes to be a bit gentle. Nook sharpness doesn’t actually enhance till you begin hitting f5.6. Nook softness on a zoom is frequent, and, up till a couple of extra fashionable mirrorless lenses, unimaginable to get away from. However, I’ve seen increasingly more edge-to-edge sharpness these days — sadly, this isn’t one among them.

Lens Character

The Sigma 28-70mm f2.8 has some reasonable pincushion and barrel distortion on the extensive and telephoto ends. It’s not likely apparent till you shoot one thing with straight strains in the direction of the sides of the picture. The wide-angle has probably the most bending on the edges. It may be corrected in put up, however it’s there. 

Pointed at direct solar, the Sigma will get a little bit of enjoyable starburst flare. For those who regulate the angle of the glass a bit, you may get clear white flare, or get some dots of rainbow colours thrown within the combine. I couldn’t discover chromatic aberration, a lot to my reduction.

The lens additionally produces some gentle vignetting. It’s gentle sufficient to edit out should you don’t prefer it. It attracts the attention in some photographs, however in others seems misplaced.

Colour Rendering

I like the colour coming from the Sigma 28-70mm f2.8. The colours are only a bit deeper however don’t fall into over-saturation. I felt like this lens captured extra gold hues and, as a photographer who commonly edits extra of that gold glow into my images, I beloved that. Colour is usually one among my favourite issues about Sigma lenses, and this one isn’t any exception.

How does the picture high quality evaluate? Sigma 24-70mm f2.8 Artwork vs Sigma 28-70mm f2.8 Up to date

Sigma claims that the optical efficiency “rivals” the same Artwork line lens. After chatting with Editor-in-Chief Chris Gampat, who had the Artwork lens in his possession, I feel that is largely the case. Each lenses have some distortion on the wide-angle and a few vignetting. They each ship that good wealthy coloration. And, each have a little bit of nook softness. 

However, I do assume the Up to date has extra nook softness than the Artwork lens. On the flip facet, the Artwork lens feels a bit sharper on the middle, which may spotlight extra pores and skin imperfections. Both approach, with the sting distortion, with each lenses you’re going to wish to maintain topics away from the corners.

Further Picture Samples

From day one, the Phoblographer has been big on transparency with our viewers. Nothing from this overview is sponsored. Additional, a lot of of us will put up evaluations and present a lot of modifying within the images. The issue then turns into that anybody and everybody can do the identical factor. You’re not displaying what the lens can do. So we have now a complete part in our Further Picture Samples space to indicate off edited and unedited images. From this, you may make a choice for your self.





  • The Sigma 28-70mm f2.8 is so gentle. I wish to carry it round all day.
  • Most f2.8 zoom lenses are properly over $1,000 and sometimes over $2,000. $900 is a superb worth.
  • The colours coming from this lens are nice — wealthy, with out being too saturated.
  • For a zoom, you may get some fairly good bokeh.
  • The wide-angle to mid telephoto is a superb versatile zoom vary and I didn’t actually miss the additional 4mm on the extensive finish.


  • The corners and edges are gentle.
  • On the wide-angle, there’s some reasonable barrel distortion.
  • Autofocus is barely slower than comparable lenses from Sony and Tamron.
  • The weather-sealing is barely on the mount.

The Sigma 28-70mm f2.8 DG DN Up to date is the lens that I want I had as a newbie. The workhorse zoom balances a low worth with a vibrant aperture, wealthy colours, and a light-weight construct. I didn’t really feel like I used to be carrying round an f2.8 zoom. And once I checked out my photographs, I didn’t wish to coloration edit a lot of them.

Once I first picked up the 28-70mm, it simply elevated the itch to modify to a lighter system from my DSLR. However, as a marriage photographer in search of my subsequent digicam system, the corners are a bit too gentle for me. The wide-angle distortion can be a bit a lot to work with. I wish to swap techniques not as a result of my digicam physique is inferior, however as a result of some mirrorless lenses are superior. The lens additionally isn’t absolutely weather-sealed. Whereas it’s lens for learners and hobbyists, it’s not going to make the reduce for my skilled work. In fact, it’s additionally not going to work properly for people who have to shoot in additional rugged situations. I like the light-weight design, however I’ve hassle with these corners.

Evaluating a $900 lens with a $2,000 lens, after all, isn’t precisely honest. The Sigma 28-70mm is for the photographer that doesn’t want tremendous sharp corners or completely straight extensive angles. It’s for the photographer that might in any other case be taking pictures a paltry equipment lens. It’s for the photographer that desires to pack gentle with out sacrificing aperture. And for that photographer, it’s lens. It’s simply not a lens that I can see attractive too many professionals or pixel peepers. At $900, I can see some hobbyists forgiving these flaws and actually having fun with this lens.

I’m giving the Sigma 28-70mm f2.8 DG DN Up to date three out of 5 stars.


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