2017 Sigma 30mm F1.4 DC DN Review

The Sigma 30mm F1.4 DN DC Modern was declared in Feb 2016, and rests on top of Sigma’s line of DN mirrorless contacts, with a two-stop advantage over their past 30mm F2.8 providing. It’s currently the only APS-C F1.4 auto-focus lens currently available for the Sony models E-mount and has an MSRP of $339.00.


With F1.4 and a 45mm comparative area of perspective, this lens on document seems to be to be the ideal choice for a ‘walkaround’ regular primary lens. The shiny aperture will fulfill low light photographers and bokeh lovers, and the near 50mm area of perspective places it right inside the flexible ‘normal’ lens range. While it won’t substitute a separate macro lens with its zoom rate of 1:7, it still is able to concentrate down to a working range of 30cm (less than a foot). The relatively low price, especially for an E-mount lens, means it’s also available for newbies and lovers as well, making it sound like an ideal primary lens that may never keep the front of the digicam once it’s installed.

With regards to just specifications we see a couple of significant variations. First, while the Sony models is 2/3 of a quit more slowly than the Sigma, it does consist of visual picture stabilizing. That alone gives it a better opportunity at being the recommended lens for video clip, although when capturing 4K the a little bit broader FOV of the Sigma might improve on any body that gives an additional plants. In pictures conditions, though, there’s little real-world distinction between the Sigma’s 45mm comparative perspective and the 52.5mm equal to the Sony models. The main distinction between them doesn’t instantly start one up to a type of photography that could not be performed with the other.

Sigma 30mm F1.4 DC DN Review
Sigma 30mm F1.4 DC DN Review

Construction between the Sigma and the Sony models is rather similar. They both use a produced steel framework with nasty internals. In comparison to older Sigma DN contacts, the Thirty millimeters F1.4 does not let its concentrate components shake about when unmounted, which is a very welcome change. The concentrate band is also an enhancement, and a step above the Sony models. The rubberized hold changes efficiently and easily with little effort, making the Sony models feel a bit firm. The only pitfall in terms of develop is the Sigma’s lens bonnet, that will not seem to with confidence click in to place, and is made of rather delicate feeling nasty.

The long gun barrel of the Sigma, and even longer overall measurements do make it quite large compared to APS-C Sony models Leader cameras, but the load isn’t entirely off-balance. While bulkier and larger, it is less expensive and lighter than the Sony models 35 F1.8. Fit, does the additional bodyweight and absence of OSS keep it from leading the Sony models as the best ‘normal’ for APS-C E-mount shooters?



The Sigma 30mm F1.4 DN is an remarkable entertainer, in comparison with its E-mount colleagues. Sharpness is not just great wide-open, it’s also pretty well managed across the area, dropping off very progressively without any unexpected fall near the side (so there must not be any unpleasant excitement at the sides.) As the lens is ceased down, sharpness enhances across almost the entire structure, although much of the development winds up focused in the center 2/3 of the structure.

Chromatic Aberration

In terms of chromatic aberration, the Sigma places up a pretty reasonable efficiency. There is some horizontal CA but this is definitely eliminated, either by the camera or most modifying software.


As to be thought with a shiny aperture primary, the Sigma encounters some large vignetting wide-open, with 1 1/3 prevents mild missing in the excessive sides. What’s promising is avoiding down even to F1.8 reveals a great enhancement.


Another trade-off for having an F1.4 highest possible aperture in a relatively small lens is pretty serious gun barrel distortions that is definitely recognized for any field with directly straight components. Without modification, it has potential to be a bit annoying.

Transmission or T-stop

The large number of complicated components and large vignetting mean that while the Sigma reviews a highest possible aperture of F1.4, the actual total amount of sunshine that goes through the lens winds up being T1.8.


In regards to bokeh, changing the overall perspective between Sigma and the Sony models reveals the included quantity of qualifications cloud the additional 2/3 quit allows the Sigma to generate (the a little bit nearer concentrate range must not create an significant difference). We can also see the Sigma generates a body ‘bokeh ball’ wide-open, with the Sony models making a bit of a rough advantage. This better form allows promote sleek bokeh in the real-world, with little in the way of fussiness as details falls out of the main concentrate aircraft. The Sigma also reveals more of a ‘cat’s eye’ impact where the bokeh changes from a circular contour around more of an ellipse: which can convert to a ‘swirl’ in the bokeh design, but in our encounter does not generate any annoying styles during use.

Auto-focus Performance

Historically, 3rd celebration contacts have not always been certified enough with the lens-mount conventional to able for making use of every bit of technical that own-brand contacts can, especially in conditions of autofocus. The very first Sigma DN collection of F2.8 primes for mirrorless are involved in this regard. They were only able to use the very core of the Sony models a6000’s phase-detect AF protection place, relying on contrast-detect AF outside this area.

Sigma 30mm F1.4 DC DN Autofokus
Sigma 30mm F1.4 DC DN Autofokus

Thankfully, with the 30mm F1.4 DN and the a6000 sequence, this has stopped being the situation. The lens is able for making use of all of the a6300’s PDAF protection place, although it are going to leap back to CDAF when concentrate is placed outside the PDAF place.

Sigma 30mm F1.4 DC DN Autofokus
30 mm, 1-60 sec, f-1.4, ISO 100

Vidio Performance

What the newly found interface includes is when used with the a6300 the Sigma can concentrate consistently in video, which makes it an easy shiny lens for videographers that want superficial detail of area but can’t manage attention puller, and need to rely on a digital camera’s AF program when capturing video. In terms of guide concentrate, both contacts function using a focus-by-wire program, but display different actions. The Sigma isn’t a straight line reaction, and instead will shift its factor based on the pace the gun barrel is converted, creating a fast holder from infinity to lowest concentrate range possible with a fast film of the hand, although trying to do it efficiently (as it would be in video) decelerates the generate rate quite significantly to about the same rate as the Sony models.

The Sony models is designed some thing in a straight line fashion, and takes quite a few movements of the hand to go from MFD to infinity. This implies videographers using guide concentrate will be able to better estimate roles of the main concentrate band when planning photos, although the slowly action doesn’t ensure it is an ideal choice either. Fortunately, both generate their concentrate components efficiently without any sort of jumpy actions that can be seen with some focus-by-wire primes, and also both review concentrate range next to the gap range on the digital camera’s screen. There are a couple other things videographers might consider. The Sony’s OSS and lowest aperture of F22 are both useful features. The OSS can help eliminate some tremble when capturing portable, and being able to stop down to F22 gives videographers a better chance to achieve the 1/framerate video ‘rule’ that could create video look sleek.

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