Does the Canon EF-S 24mm f/2.8 STM Lens offer any significant advantage over the Canon 18-55mm IS II at a 24mm focal length (the kit lens for my T3i)?

I'm looking for a cheap lens that offers a wide angle and a wide aperture for shallower depth-of-field and better night shots, and this one seems promising. Just wondering if the difference in image would be worth the price, considering this lens offers a wider aperture at 24mm than the kit lens.

Here is the 24mm lens: http://amzn.com/B00NI3BZ5K


1 Answer 1


We can't tell you whether the difference in image quality is worth the price, because that's a personal decision based on your circumstances.

What we can tell you is the advantages the EF-S 24mm will give you over your kit lens:

  • A stop of aperture (the 18-55 has a maximum aperture of f/4.0 at 24mm). That's never something to be sniffed at.
  • Physically much smaller and lighter.
  • Non-trivially better (but by no means top of the range) image quality.
  • STM autofocusing as opposed to the micromotors in your 18-55. The main advantage here is going to be they're much quieter - a significant advantage if you ever want to do autofocus with video.
  • No rotation of the front element when focusing. If you ever shoot with polarised or graduated filters, this is a big advantage.

[ The last two points would go away if the comparision were with the latest STM kit lens ]

And one potentially big disadvantage:

  • No image stabilization. If you're used to relying on that for your shots, this lens isn't for you.

The other point to note is that 24mm on an APS-C camera isn't very wide - equivalent to 38mm in full-frame terms. However, as you're already shooting with a lens that can manage 24mm, you probably know what you'll be getting here.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.