# Canon EF 50mm f/1.8 STM

Source: https://www.ranked10.co.uk/tech/best-50mm-lenses/canon-ef-50mm-f1-8-stm
Ranked #1 in "Best 50mm Lens 2026: 10 Ranked, Spec Sheets Cross-Checked": https://www.ranked10.co.uk/tech/best-50mm-lenses

- Price: £129.00 (checked on Amazon UK on 2026-09-18)
- Amazon rating: 4.8 from 12,464 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B00XKSBMQA?tag=ranked10-21

The Canon EF 50mm f/1.8 STM is a fixed 50mm prime for Canon's EF mount, listed at £129.00 with a 4.8 rating from 12,464 ratings — the largest review count in this guide, and the reason it sits at number one. Its own bullet points describe a 160 g lens measuring 40 mm, with an f/1.8 maximum aperture, an STM stepping motor for quiet continuous focusing, and 49 mm filter thread.

The spec table underneath is where it gets interesting. The Fixed Focal Length row reads '50 Angstrom', in the same table where Maximum Focal Length and Minimum Focal Length both read '50 Millimeters'. An Angstrom is a unit of distance, not a focal length, so those rows cannot both be right. The table also carries no maximum aperture row at all — only a Minimum Aperture of '22 f' — so the f/1.8 the listing leads on appears in the bullets and nowhere in the specs. It also lists a Battery Average Life of 30 minutes and a Screen Size of 2.54 Inches for a lens. Everything on this page comes from the Amazon listing, not from any testing of our own.

## Specification

| Field | Value |
|---|---|
| Price | £129.00 |
| Rating | 4.8 out of 5, from 12,464 ratings |
| Maximum Focal Length | 50 Millimeters |
| Fixed Focal Length (as listed) | 50 Angstrom |
| Maximum Aperture (from the bullet points) | f/1.8 |
| Minimum Aperture | 22 f |
| Weight | 160 g, 40 mm long |
| Image Stabilization Type (as listed) | no image stabilization |

## Questions people ask

**Does the Canon EF 50mm f/1.8 STM fit Canon EOS DSLRs?**

Yes. The listing says it is compatible with all Canon EOS DSLR cameras, and the Compatible Camera Models field reads 'Canon EOS SLR cameras'.

**What maximum aperture does the listing give?**

f/1.8, and only in the bullet points. The spec table has a Minimum Aperture of 22 f but no maximum aperture row at all.

**What is the fixed focal length of this lens?**

The table disagrees with itself. Minimum Focal Length and Maximum Focal Length both read 50 Millimeters, while the Fixed Focal Length row reads 50 Angstrom.

**Does the Canon EF 50mm f/1.8 STM have image stabilisation?**

No. The Image Stabilization Type field says 'no image stabilization'.

**Will it work on an EOS R camera?**

Two bullets disagree. One says the lens is compatible with Canon EOS R series mirrorless cameras via EF-RF Mount Adapters; the next says it is not compatible with 'EOS R' models such as EOS R100, R50, R10, R6, R7 and R8 unless you purchase the Mount Adapter.

**How heavy is it and what filter does it take?**

The listing gives 160 g and 40 mm in length, with a Photo Filter Size of 49 Millimeters.