This is simply because the Sigma has a slightly narrower angle-of-view than the Sony lens, though I didn’t take the time to measure which one is more accurately a 24mm (if either of them are). However, I did compare the distance between some set points in two photos taken from the exact same location (in fact, I did this on two sets of photos, just to be sure). The 24mm f1.4 DG DN Art from Sigma is a wide prime lens designed for mirrorless cameras with L-mount or Sony E-mount and corrected for full-frame sensors. 24mm is a popular focal length for architecture, large interiors and landscape photography without being prone to some of the distortions that a 20mm lens can produce. On a cropped sensor the angle of view is equivalent to a 36mm lens which is often used for street photography. The 24mm f1.4 DG DN Art combines this coverage with a bright focal ratio that’s ideal for low-light use and can also deliver shallow depth-of-field effects, especially when the subject is positioned close to the minimum focusing distance of 21cm. The Sigma 24mm f1.4 DG DN Art costs 899 EUR / 799 USD / 779 GBP and is made in Japan. It was announced in August 2022 together with he Sigma 20mm f1.4 DG DN Art complementing the Sigma 24mm f2 DG DN and Sigma 20mm f2 DG DN of their Contemporary line. And Sigma still sells the 24mm f1.4 DG HSM Art and 20mm f1.4 DG HSM Art designed for DSLRs which can be used via adapter on a Sony E-mount camera. Still, this lens improves significantly upon its predecessor in this regard, and f/1.4 images look nice, at least until you compare them with the impressive results at f/2.8.

Weight: 665g. Pretty heavy, but that seems to be the standard for 24/1.4 lenses as the respective offers from Nikon, Samyang and Canon are around the same weight (and size). [0] Although this lens can be used with a close subject rendered large in the frame, lenses such as this one are often used at normal (or even long) subject distances. Comes with a 9 blade-rounded diaphragm which creates an attractive blur to the out-of-focus areas of the imageMinimising vignetting along with the improved efficiency at large apertures secures fantastic brightness and high contrast visible in the images produced by the Sigma 24mm f1.4 DG HSM. This includes indoor photography, astronomical photography as well as blue sky photography. Corresponding AF Mounts This button also acts as a custom button and can be programmed to another function using the camera's menu. By incorporating "F" Low Dispersion (FLD) glass as well as Special Low Dispersion (SLD) glass elements, the lens is able to minimise chromatic aberration of magnification that is mostly visible around the edge of the image. In addition to this correction of axial chromatic aberration is a possibility thanks to the aforementioned power layout. This lens achieves high image quality as well as sharp and high contrast image rendering without any colour blur. Minimised Distortion Sealing: Yes, both Sigmas and the Sony have a rubber grommet at the lens-mount plus further special weather-sealing throughout the construction. The Viltrox does not even have a rubber grommet. [+]

Made in Japan, each Art lens is tested with Sigma's proprietary MTF measuring system, ensuring a quality product. The Sigma 24mm F1.4 DG DN Art Lens is a good choice for those looking for the 24mm angle of view and an ultra-wide aperture at a reasonable price.The resolution chart is brutal/merciless on image quality, so let's take the testing outdoors with a series of center-of-the-frame 100% resolution crop examples.

The USPS love stamps shared above have an image area that measures 1.05 x 0.77" (26.67 x 19.558mm), and the overall individual stamp size is 1.19 x 0.91" (30.226 x 23.114mm). The 24mm F1.4 and 20mm F1.4 lenses sit alongside 35mm and 85mm models in Sigma's series of F1.4 primes in the company's designed for full-frame mirrorless 'DG DN' range. The weight of the Sony FE 24mm f/1.4 GM measures at an impressively light 445 grams / 0.98 pounds. This makes it the lightest 24mm f/1.4 available today. By comparison, the Canon EF 24mm f/1.4L II weighs 650 grams. The Nikon AF-S 24mm f/1.4G weighs 620 grams. The original Sigma 24mm f/1.4 Art (Sony E version) weighed 740 grams, and even the newer “DN” version of the Sigma 24mm f/1.4 Art, designed specifically for mirrorless cameras, is 510 grams. The f/1.4 refers to the maximum aperture, the ratio of the focal length to the entrance pupil diameter, available in this lens.Closest focus distance is 0.25m which gives you a working distance of around 10 cm when you don’t use the lens-hood. Maximum magnification is 1:5.3. That’s not much but is standard in this lens-class. [0] We’ve looked at distortion and vignette previously, but how about color rendition, flare resistance, bokeh, and coma? Some of these measurements are subjective, so in part you may need to trust my experience with a wide variety of lenses. Lateral (or transverse) CA (Chromatic Aberration) refers to the unequal magnification of all colors in the spectrum. F/11 brings on increased depth of field that provides significant improvement in corner image quality. If you can live with a maximum aperture of f/1.8 or even f/2.0 there are more alternatives: From Sigma for example the 18-35mm f1.8 DC Art (680 EUR), which is a very interesting zoom but covers only APS-C / DX sensors or the 24-35mm f2.0 DG Art (970 EUR). From Nikon there’s the new AF-S 24/1.8G lens (850 EUR) which earned a Recommended in my Nikon 24mm f1.8G ED review.