The Canon RF 28mm f/2.8 STM produces a heavy (4.1%), albeit not excessive, degree of barrel distortion in RAW images. As usual, auto-correction reduces the issue to a negligible degree. If you choose JPEG-only output, you can't even disable auto-correction in the camera. 28mm (corrected) Extreme corner sharpness isn’t quite as good at maximum aperture as it is on Canon’s EF-S 24mm f/2.8 STM – an extremely similar lens – and the manual focus ring is arguably a little thinner than is comfortable, but otherwise most aspects of this lens are very strong indeed. So, first of all. 24 f/2.8 STM and 28mm f/1.8 are wildly different focal lengths. The 24 is an EF-S lens, while the 28 is a EF lens. Since your gear list shows that you have a 70D, you have to think that your camera has a crop factor. Buy Canon EF-S 24mm f/2.8 STM Lens featuring EF-S-Mount Lens/APS-C Format, 38.4mm (35mm Equivalent), Aperture Range: f/2.8 to f/22, One Aspherical Element, Super Spectra Coating, STM Stepping AF Motor, Rounded 7-Blade Diaphragm. Review Canon null Optical properties. On Canon crop cameras, the EF-S 24 / 2.8 STM is a moderate wide or, rather, a universal staffer, with EGF 38 mm. Unlike full-frame 24mm lenses, the Canon EF-S 24/2.8 STM has a much less asymmetric optical design, which reduces field aberrations. In addition, the correction of optical distortion provides an aspherical rear The Canon EF-S 24mm f/2.8 STM is an impressive lens that is small in size and low in price, making it appealing for many photographers. It has a full frame equivalent of 38mm when mounted on a Canon EOS R7 camera, and its autofocus speed is fast, reliable and quiet thanks to its STM motor. Its build is also beautifully made with a metallic lens mount. The lens has quite good sharpness Re: Canon EF-S 24mm F/2.8 STM: best option of wide-angle prime lens for beginners? In reply to edgareler • Jul 21, 2019 Keep in mind that a 24mm lens isn't that wide on a Canon APSC camera, it corresponds to 38mm on fullframe. Canon RF 28mm f2.8 STM review so far; Zhongyi Mitakon Speedmaster 85mm f1.2 review; Canon RF 100-300mm f2.8L IS USM review so far; Canon RF 24mm f1.8 STM review; Canon RF 100mm f2.8L Macro IS USM review; Canon RF 14-35mm f4L IS USM review; Canon RF 100-400mm f5.6-8 review; Canon RF 16mm f2.8 STM review; Canon RF 5.2mm f2.8L Dual Fisheye See It Read Our Canon EF 50mm f/1.4 USM Review. 4.0 . Excellent . Carl Zeiss Makro-Planar T* 2/50. The EF-S 24mm f/2.8 STM and, if you prefer a slightly tighter field of view, the EF 40mm f/2. EF-S 24mm f/2.8 STM - photos, first impressions, and reviews Nov 13, 2014 The lens is starting to ship today, earlier than expected, and the images are beginning to trickle in. Y8rEf.