Bad Lens for Astrophotography: Canon EF 50mm f/1.4 USM

I do not usually make reviews of photographic material, but recently a friend told me excited that he had bought a Canon EF 50mm f/1.4 USM to take astronomy photographs and after doing some tests he realized that he had been wrong.

What’s wrong with the Canon EF 50mm f/1.4 USM for Astrophotography

The most striking when it begins to be used, especially at f / 1.4, is the coma:

Brutal coma in Canon EF 50mm f/1.4 USM

This defect causes this objective to be inappropriate for astrophotography at apertures close to f / 1.4, since the image fragment that remains without defects is very small.

In order to prevent more excited people from wasting time and money with another disappointing Canon objective such as the EF 50mm f / 1.4 USM, I wanted to publish an example of what this objective can offer you:

Canon EOS 5D Mark III + Canon EF 50mm f/1.4 USM @ 1.4, 10 sec, 6400 ISO, piggybacked

Click here to see the full size resolution image

Try the Sigma 50mm F1.4 DG HSM Art for Canon. It is heavier and more expensive, but if you are looking for image quality then you have to go to other brands other than Canon when you look for a 50mm for your camera. The Sigma 50mm F1.4 DG HSM Art is impressive for astrophotography, even at 1.4.

Conclusion about this Canon 50mm 1.4


  • Poor image quality.
  • Coma: when the stars looks like flying birds. In this lens is very accused, especially in the corners. It cannot be corrected with software.
  • Old, it was introduced in the market in 1993. So the design of this optics can be greatly improved.


  • It is light and small.