Andy Westlake finds out whether Canon’s inexpensive and tiny prime lens is a tasty option for APS-C users in our Canon EF-S 24mm f/2.8 STM Review

Product Overview

Overall rating:

Canon EF-S 24mm f/2.8 STM


Canon EF-S 24mm f/2.8 STM review


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Canon EF-S 24mm f/2.8 STM – Image quality

Canon EF-S 24mm f/2.4 STM at f/2.8

At f/2.8 it’s possible to get nicely-blurred backgrounds with close-up subjects

For a decidedly inexpensive lens, image quality is rather good. It’s slightly weak at f/2.8, with somewhat soft corners and visible vignetting, but stop down to f/4 and the lens performs very well. Pictures are consistently sharp across the frame, and remain so at apertures down to f/11. At f/16 diffraction blurs the image a little, and at f/22 it’s visibly soft when viewed on the pixel level. Of course, there’s a trade-off to be made against depth of field here, as sometimes the increased front-to-back sharpness can be more important than any loss of acuity when considering the image as a whole.

Some barrel distortion is present, with visible bowing of straight lines along the edges of the frame, but it’s not very objectionable and is easily corrected in post-processing. Red and cyan colour fringing from lateral chromatic aberration is visible if you go looking for it, and covers a larger area of the frame than I’d normally expect. However, with relatively narrow fringe widths, it’s never really intrusive.

With its f/2.8 aperture, this Canon lens can give quite nicely blurred backgrounds at close focus distances, and in general the bokeh is reasonably attractive. Complex backgrounds can sometimes appear hard-edged and ‘busy’ when viewed too closely, but considering this lens can be bought for around £150, it seems churlish to complain.

  1. 1. Canon EF-S 24mm f/2.8 STM Review – Introduction
  2. 2. Canon EF-S 24mm f/2.8 STM – Features
  3. 3. Canon EF-S 24mm f/2.8 STM – Build and handling
  4. 4. Canon EF-S 24mm f/2.8 STM – Image quality
  5. 5. Canon EF-S 24mm f/2.8 STM – Test results
  6. 6. Canon EF-S 24mm f/2.8 STM – Verdict
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