Why I bought a Sigma 30mm f/1.4 lens over a Canon EF 50mm f/1.4 lens

Chris asks:

You have a Sigma 30mm f/1.4, right? Why not Canon 50mm f/1.4? Was focal length the biggest deciding factor? I’m considering the 50mm f/1.4 and wanted to get your viewpoint.

Thanks for asking, Chris! I figured it be more helpful to post my answer here for all to see.

I wanted a lens that got close to representing the field of view from the human eye (50mm). On my Canon EOS 40D cameara, with a 1.6x crop sensor, a 30mm lens would have an effective focal length of 48mm. That’s the primary reason I chose the Sigma 30mm f/1.4 EX DC HSM lens.

The Sigma 30mm lens stays on my camera most of the time.

When I upgrade to a full frame camera (e.g. Canon EOS 5D Mark II), then I’ll be more likely to ditch the Canon EF 50mm f/1.8 II lens and Sigma 30mm f/1.4 lens, then get the Canon EF 50mm f/1.4 USM.

Why ditch the Sigma 30mm f/1.4 lens? That specific Sigma lens was meant for crop sensors, so there would be slight vignetting.

Of course, I’ve tried both lenses and I love them. I think you’ll be happy with either purchase.

I hope that helps, Chris! If you have any other feedback for him, please leave a comment.

Published by

Bryan Villarin

Bryan works at Automattic. Cat whisperer. Sometimes, a photographer and card magician.

3 thoughts on “Why I bought a Sigma 30mm f/1.4 lens over a Canon EF 50mm f/1.4 lens”

  1. Thanks Bryan, I figured that as much. Since it’s a focal length issue, I’ll go with the 50mm 1.4 since I don’t want to buy another lens when I upgrade to FF body.


  2. I couldn’t agree more. When I get a secondary camera (cropped sensor), I’ll repurchase the Sigma 30mm.

    You won’t be disappointed with either purchase, Chris.

    – JT


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