Zeiss Loxia 21mm f/2.8 – Distagon Lens Review

This Zeiss Loxia 21mm f/2.8 lens review is based on my user experience having owned the lens since it was released in Europe. The Zeiss Loxia 21mm f/2.8 lens is a small, super wide-angle, distagon lens for the FE mount. Its optical qualities are suitable for current and future full-frame sensors found within Sony mirrorless cameras, such as the Sony a7III, Sony a7rIII and the Sony a9. This will also work well with Sony mirrorless crop cameras e.g. the Sony a6400, and Sony a6500.

I believe this is a particularly versatile focal length and although people would argue 35mm is more versatile, a landscape photographer, interior or architectural photographer will be right at home with the Zeiss Loxia 21mm f/2.8 lens.

Introducing the Zeiss Zeiss Loxia 21mm f/2.8 Distagon lens

I bought the Zeiss Loxia 21mm f/2.8 manual focus lens for its wide aperture, small size and the signature image quality Zeiss is known for; it is my second lens from Zeiss and I have always loved it :). The Zeiss Loxia series consists of several lenses–this being the third. It is the first with a completely new optical design. At the time of writing, Zeiss also make a 25mm, 35mm, 50mm and an 85mm lens. I also own the Zeiss Loxia 50mm f/2.0 lens and I initially felt it was slightly uncomfortable to use; at the time, it felt too easy to accidentally turn the focus ring. This was user error and I soon learned this can be negated by resting a finger or two on the lens hood–Zeiss Loxia lens hoods do not rotate. The Zeiss Loxia 21mm f/2.8 is slightly more comfortable and you don’t necessarily need the lens hood but it’s small and you should take it for its optical benefits anyway.

Stated in my Zeiss Loxia 50mm f/2.0 lens review, I noticed slight “play” in the aperture ring of that particular lens. Zeiss has contacted me and said the play in the aperture ring is due to the de-click feature of the lens (for those unfamiliar, the aperture ring has positions which click and this is useful for still photography, but you can disable the clicking if you do videography). In comparison to the Zeiss Loxia 50mm f/2.0 lens, the Zeiss Loxia 21mm f2.8 lens has slightly less “play” in the aperture ring but it is present. It is extremely minor and I mention it for those that already own the lens as they might be curious or alarmed by it–it is normal and nothing to worry about.

The nice thing about these lenses, and mirrorless lenses in general, is that they can be designed differently—often smaller—to DSLR lenses. I won’t bore you with information about retrofocus lenses and whatnot. Keeping things simple: the sensor on a DSLR camera is too far back for a lens design like this as the lens element would hit the mirror. When I initially wrote this section, I predicted we will see more compact lenses in the future and Zeiss announced several more lenses. I’m not sure where their plans lie now because the 52mm thread might prove different for longer focal lengths. If I was to guess, I would expect to see an even wider lens at some point. If what you’re after is something wider, and you also want this focal length, my advice is to get the Sony 16-35mm f/2.8 G Master lens.

Lens Haptics

When we’re to judge a Zeiss manual focus lens as opposed to some of the Sony or Sony Zeiss native alternatives, or even the Zeiss Batis line up, in my opinion, we should be looking at the feel, size, and the experience of using them. This doesn’t apply to all lenses, for example I consider the Sony 12-24mm f/4 lens as nothing more than a tool, and I only care about the end result with it. The results with the Zeiss Loxia 21mm f/2.8 lens is strikingly good–in the right hands–but I don’t believe the enjoyment from a manual focus lens on a Sony mirrorless camera can be overstated. Hiking 20 miles with it is a pleasure, especially because of its small size and weight. That said, there has been times it is not wide enough and switching lenses mid hike is a pain.

The handling of a Zeiss Loxia 21mm f/2.8 lens is nothing like a focus-by-wire or even the “L” lenses made by Canon (they are not focus-by-wire); Zeiss Loxia lenses in general feel significantly nicer to use than anything made by Canon or Nikon. Zeiss Loxia focus rings are also well dampened, and the Zeiss Loxia 21mm f/2.8 lens feels just like the Zeiss Loxia 50mm f/2.0 lens in regards to the resistance of the focus and aperture rings. The oil and threads they have used are wonderful. If you feel the zoom ring of the Sony 24-70mm f/2.8 G master lens, for example, you can almost feel how big the teeth are on the cogs. With the Zeiss Loxia 21mm f/2.8 lens, it is buttery smooth.

Focusing Characteristics

When I initially used the Zeiss Loxia 21mm f/2.8 lens, I immediately noticed the vastly different focus throw in comparison to the Zeiss Loxia 50mm f/2.0—there’s only a 90 degree turn from the nearest focus point to infinity. I have not found it to be a problem, and I feel that on such a wide angle lens it doesn’t really matter because there’s such a large area to focus with. I think it would be more of an issue on a portrait lens where you have to get the eyes in critical focus. My muscle memory with it is good now and my opinion hasn’t changed since when I first owned it. In an ideal world, perhaps it would have made more sense for the lenses to have similar focus throws, but it’s a difficult argument to make because the subject distances are vastly different i.e. it is possible Zeiss have chosen this method for a reason e.g. different focal lengths require slightly different focusing requirements. I have never once thought “oh damn, I wish the focus throws were the same, this is so confusing!” This lens leaves little room for criticism—it is that good. One of the main reasons I dislike acceleration on focus-by-wire lenses is because it’s difficult to acquire accurate muscle memory. It’s nice to escape that.

Upon focusing, you’ll notice the barrel extends or contracts slightly and there’s fairly minimal focus breathing—especially in comparison to the 55mm f/1.8 FE. I am pleased about this because focus breathing is extremely easy to notice with a wide angle lens. Focus breathing seems to be a bit of a mixed bag and it totally depends on what lens you own; I used to think Sony lenses were worse than others, but it “just depends”. On a case by case basis, the Zeiss Loxia 21mm f/2.8 lens is far better than average. Many reviews fail to mention this and it is a particular problem with videography—something the Zeiss Loxia 21mm f/2.8 excels at, even excluding its other features e.g. de-click and manual focus.

The Zeiss Loxia 21mm f/2.8 lens is slightly more comfortable to hold than the Zeiss Loxia 50mm f/2.0 without hoods, and in pictures, you wouldn’t think so. The lens isn’t much longer, but it is long enough to be noticeable; however, I leave the hoods on at all times and this difference goes away. There’s only ridges on a part of the barrel, but the entire barrel rotates which is why you should use the hood as it is non rotating, just like the Zeiss Loxia 50mm f/2.0 lens. It is fairly small and inconspicuous. By laying your finger to rest on the lens hood, you can easily negate the issue of accidentally turning the focus wheel. The lens hood is mostly metal but it has a plastic mount—this is the way a lens hood should be made. Metal on metal is not good and it is why I am in favour of plastic lens caps. Any part strengthened means something more important takes impact or can be scratched. Cars are designed to have points that break easily or cannot scratch as easily as others. I wish people would not give Zeiss negative comments for plastic parts in their lens hoods or plastic lens caps but instead credit them. It’s not good to have metal scraping against black paint. This design seems to keep the metal fanboys happy as it has metal, and it keeps fussy people like me happy as it’s not strictly metal on metal–Zeiss’s design is ingenious.

Sharpness and other attributes

I have examined the sharpness of this lens thoroughly, and one test I found quite useful was to take a photograph of a wall covered in wallpaper—this allowed me to examine fine details and judge whether the photograph is sharp throughout the entire frame. The Zeiss Loxia 21mm f/2.8 lens does not disappoint in this regard.

The colours are superior to the Sony lenses I own but Adobe Lightroom does such a weird job of handling colours and I like to make my own profiles anyway. It’s a mild difference, overstated by some and understated by others, but you’ll definitely notice the difference after taking many photographs under different lighting conditions. I believe that it’s only through using a lens a lot that you can judge its characteristics properly, especially colours—unless you’re to use more objective measures e.g. colour charts. However, colour charts do not give you a feel of how a lens looks. The colours with this lens look accurate.


The photographs above are poor but they’re the best examples I could find to demonstrate what the sun stars are like. The sun stars are pleasant and it handles flaring extremely well. Even if you shoot at a specific angle deliberately to get the lens to flare, in harsh lighting, add a filter and remove the lens hood, the flaring is still minimal. As previously stated, the hood is small and there’s no reason not to use it at all times, aside from forgetting to attach it to the lens properly–this might happen if you’re forgetful–the lens hood can also sit reversed on the lens for storage.

Chromatic aberration and other lens anomalies

The chromatic aberration is well controlled and there’s no real distortion to speak of. Lightroom might make a tiny, tiny change but nothing major. Even the vignetting is very good. A few Sony lenses have made compromises on purpose, knowing the files have the flexibility to correct these errors upon import, but I think there’s something nice about the fact this doesn’t sabotage some of the data upon import, so to speak. It’s all around a very good lens.

Infinity stop

The infinity stop is not completely at infinity and this is normal for a manual focus lens. This accounts for atmospheric differences. I found it slightly annoying at first but now it’s not a problem and it does make sense. Moreover, the focus point on the majority of lenses changes slightly when you change aperture. This is why it can be a bad idea to open up a lens, focus, and then stop down the lens—in most situations, it doesn’t matter. Auto-focus cameras and lenses are notorious for this. I believe that while this would be deemed a “landscape” lens, you should still focus on your subject and not just blindly focus on the background. My point here is that if you are focusing on a subject close up using a small or even large aperture, then the infinity focus is not going to make a huge difference given the wide angle nature of the lens. Foreground subjects help to add depth to landscape shots. In other words, it’s considered a landscape lens but that doesn’t mean you should always be focusing on those mountains in the distance :).


The Zeiss Loxia 21mm f/2.8 lens is not sealed, but it does have a gasket towards the mount. I find it odd that the manual focus, non-sealed lenses have gaskets and the auto focus “sealed” lenses made by Sony, do not have gaskets—excluding the GM (G Master) series. It is bizarre but there’s nothing to complain about here, just don’t get it completely soaked.


Mounting and dismounting the Zeiss Loxia 21mm f/2.8 lens is simple but it is often done incorrectly—some reviewers have said that you should hold the lens near the aperture ring. This means you have to grip it unnecessarily hard and you’ll probably damage the o-ring at the back, at some point. Do not do this. I won’t debate my ever declining respect for YouTubers, but the easiest way to mount or dismount any Zeiss Loxia lens is to simply turn the focus ring to infinity or closest focus, and then twist as you normally would. Zeiss have confirmed this method (they personally emailed me) won’t damage or “unscrew” anything.

Loxia vs Batis Comparison

If you’re interested in buying the Zeiss Loxia 21mm f/2.8, then you’ve probably considered the Zeiss Batis 25mm f/2.0 as the focal lengths make them arguably similar lenses. There’s also a Zeiss Batis 18mm f/2.8 to consider.

The focal lengths seem similar but in practicality, zooming from 21mm to 25mm makes a huge difference; it’s vastly different than 50mm to 55mm for example. They might not be exactly as advertised i.e. the Batis might be slightly wider; however, you’ll still notice the difference. The newer Zeiss Batis 18mm f/2.8 isn’t quite as good optically but it’s still a stellar lens. The flaring on the Zeiss Batis 18mm isn’t quite as good as the Zeiss Loxia 21mm f/2.8 either, and the Zeiss Batis 18mm has more distortion. Both the Zeiss Batis 18mm f/2.8 and the Zeiss Batis 25mm f/2.0 both have more chromatic aberration than the Zeiss Loxia 21mm f/2.8 lens as well. The Zeiss Batis lenses are great though and should not be ignored. At this point, it’s like debating the speeds between the top five fastest runners; they’re all fast and I hope this review doesn’t lead you to believe otherwise.

A wide aperture, wide angle lens opens up creative opportunities unavailable to those that shoot with narrower aperture lenses; it not only takes skill but also a certain surrounding to capitalise on this. For this reason, you might want to consider this lens even if you own the Sony 16-35mm f/4 lens. The Zeiss Loxia 21mm f/2.8 is a somewhat wide aperture lens but it’s certainly noticable when compared to the Zeiss batis 25mm f/2.0 lens.

Being able to manually change the aperture means you won’t have slight focus shifts due to the auto-focus (auto aperture?) system automatically opening the aperture. This isn’t usually a problem with a Sony mirrorless camera but it can be a problem with a DSLR.

The Zeiss Batis lenses might be slightly easier to focus with but Sony mirrorless cameras are extremely easy to manually focus with, unlike a DSLR. In a lot of cases, you can crop to a 25mm equivalent but you obviously cannot crop to a 21mm equivalent.

Consider the Zeiss Batis 25mm f/2.0:

  • Creative opportunities not possible with the slightly narrower aperture (these are few and far between)
  • If you only shoot in extremely cold temperatures (this only becomes an issue if you’re physically shaking or your fingers get stuck to the metal)
  • If you’re super concerned about rain (in which case you should cover up the camera and lens somewhat anyway)

Consider the Zeiss Loxia 21mm f/2.8:

  • It’s a great size
  • It balances with the camera well
  • I think it’s a perfect focal length for a wide angle; it’s not too telephoto and it’s not so wide that distortion becomes a huge problem
  • It’s still a wide aperture lens it’s just not quite as wide as the Batis
  • It has a good field of view in crop mode (32mm equivalent) for video purposes

Sony 24mm f/1.4 lens

I don’t own the Sony 24mm f/1.4 G Master lens so it’s unfair of me to make too many comments. What I can say is that 24mm is significantly longer to me, and f/1.4 is significantly brighter but it’s not an aperture I’d use for a lot of the photographs I take. I think you need a specific purpose to benefit from the wide aperture e.g. nighttime photography. Its flaring, colour rendition, general image quality, etc. probably isn’t as good–excluding bokeh. I’m guessing here a bit but personally I’d stick with the Zeiss Loxia 21mm f/2.8 lens unless you already own the Sony 16-35mm f/2.8 G Master lens, in which case I’d recommend the Sony 24mm f/1.4 G Master lens.



I planned on hiking the Pacific Crest Trail in Northern America. I bought into the Sony system because it is lighter weight than my previous Canon camera. The Zeiss Loxia 21mm f/2.8 lens is no exception, and it is small enough for my needs. I took it with me to Canada hiking a lot and it made me really happy, as it was considerably lighter than the Sony 24-70mm f/2.8 G master lens I had mounted a lot of the time. I always enjoy using the Zeiss Loxia 21mm f/2.8 lens even after I bought the Sony 12-24mm f/4 lens. The G Master lenses are heavy but with something like this in your bag, you can spread weight differently when you’re exhausted. It is really nice to have a compact wide angle, wide aperture prime lens made by Zeiss. The Sony mirrorless system is modular by design and I like it. Despite all this, there has been the odd occasion on a hike where I thought to myself “I wish I could go slightly wider”. For this reason, I also own the Sony 16-35mm f/2.8 G master lens; with something requiring this exact focal length, the contrast, flaring, sunstars, etc. make the Zeiss Loxia 21mm f/2.8 lens the better tool for the job.



  • Size
  • Weight
  • Manual focus
  • Gasket
  • Extremely sharp
  • Good colours
  • More comfortable to use than other manual focus lenses of its calibre
  • Minimal focus breathing


  • The barrel extends and contracts slightly when you focus
  • It is not fully sealed

I haven’t mentioned the price; a review cannot tell you whether it is out of your budget. Zeiss lenses are all quite expensive but their prices are not too dissimilar from Canon’s top of the range glass. There’s not a camera and lens, size, weight, focal length and quality combination like this for a DSLR. There are other small lenses for a mirrorless camera such as a Voigtländer Color-Skopar 21mm f/4.0 but it won’t compare optically. That said, Voigtländer are creating more lenses for the Sony e-mount system and I applaud them for that.

I would really like to see a macro lens from Zeiss, perhaps a Zeiss Loxia 85mm f/4.0 macro lens or a Zeiss Loxia 100mm f/2.0 1:1 macro lens.


Here are some more examples of photographs taken with this lens.

Here are some unedited RAW files converted to JPG to show the colours.

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5 thoughts on “Zeiss Loxia 21mm f/2.8 – Distagon Lens Review

  • 29/12/2020 at 00:04

    Nice review n the Loxia 21mm. I just picked one up at a great price to use on my Sony A7RII. The sharpness is outstanding. It pairs well as an in between with my Voigtlander 15mm and my Zeiss 28mm f2 ZE.

    • 04/01/2021 at 14:31

      Thank you. Glad you like the lens! It is really exceptional in my opinion and doesn’t get as much attention these days due to voigtlander lenses, but I love it.

  • 05/01/2020 at 05:35

    Nice writing and discussion.

    So you want a wider Loxia? There is one: the Laowa 15mm f2 Zero-D. This lens has the operational feel and the solid build and smooth focus ring of a Loxia, and similar compact size. Its MTF curves by aperture pretty much duplicate those of the Loxia 21. Though it lacks an electronic chip and the blue gasket, it focuses to 11 cm allowing compositions not before possible. It has produced my most interesting wildflower images, the greatest percent of my landscape keepers and competition entries, and until I bought the 1.4/24 GM it was my best astro lens. I never travel without it. You’ll need to carry 72mm filters. Give this Laowa a try!

    Besides the Loxia 2.8/21 In this focal length “zone” I also have the 1.4/24 GM, and I have the Loxia 2/35 and the Batis 2/40 CF. Each has its specific purpose. The Loxia 21 is for night photos where I want aperture stars around lights. The 24 GM is for astro and auroras shot at f/1.4. The Loxia 2/35 is for aperture stars, and the 40 CF is my walk around lens in wildflower season. Never would I tote both the Loxia 21 and the GM 24, or both the Loxia 35 and the Batis 40. Depends on what I intend to shoot.

  • 13/03/2016 at 18:13


    Love your blog! Stumbled across it while looking up lenses for real estate photography, and found your page. Mostly I do travel and family photography, but I am planning to break out into the real estate photography and film world. If you don’t mind me asking, did you use the Zeiss Loxia 21mm f/2.8 lens for most of the photos shown in your portfolio?

    • 13/03/2016 at 20:16


      Thank you! It has been used for a few of them. If you highlight the photograph (this might not work with some screens), anything marked with a focal length of 21mm is taken with the Zeiss. Alternatively, if you click the “About” section, it should bring you to my flickr. That should show what photographs were taken with which lens.

      I would recommend the 21mm Zeiss lens for everything you have suggested. I don’t know that much about real estate, but for indoor shots, you might also want to consider the voigtlander 15mm. It’s going to be available in “E” mount. I see it as more of a supplementary lens rather than a solo lens because I think 21mm is a more useful focal length in general.

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