# Canon RF 50mm F1.8 STM

Source: https://www.ranked10.co.uk/tech/best-50mm-lenses/canon-rf-50mm-f1-8-stm
Ranked #2 in "Best 50mm Lens 2026: 10 Ranked, Spec Sheets Cross-Checked": https://www.ranked10.co.uk/tech/best-50mm-lenses

- Price: £183.00 (checked on Amazon UK on 2026-09-18)
- Amazon rating: 4.7 from 1,850 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B08MQBVFVW?tag=ranked10-21

The Canon RF 50mm F1.8 STM is a prime lens for Canon's EOS R mirrorless bodies, listed at £183.00 with a 4.7 rating from 1,850 ratings. It sits at number two in this guide. Canon's description calls it the new version of the Nifty Fifty: a fixed 50mm f/1.8 with STM focus, 160g in the hand and 40.5mm across.

The spec table on the same page does not agree with itself. Maximum Aperture is recorded as "1.8 Millimetres" — a distance rather than an aperture — while Minimum Aperture is given as 22.0 and Fixed Focal Length as 50 Millimetres. Image Stabilisation Type reads "Optical", yet none of the product bullets mentions stabilisation; the Stepping Motor is the only mechanism described. The star breakdown supplied with the listing adds up to 100 reviews across four star levels, against the 1,850 ratings stated on the page. Everything here comes from the Amazon listing, not from testing we carried out.

## Specification

| Field | Value |
|---|---|
| Price | £183.00 |
| Rating | 4.7 out of 5 from 1,850 ratings |
| Maximum Aperture (as listed) | 1.8 Millimetres |
| Minimum Aperture | 22.0 |
| Fixed Focal Length | 50 Millimetres |
| Image Stabilisation Type (as listed) | Optical |
| Photo Filter Size | 43 Millimeters |
| Weight (as stated) | 160g |

## Questions people ask

**What is the maximum aperture of the Canon RF 50mm F1.8 STM?**

The Maximum Aperture field in the spec table reads "1.8 Millimetres", while the description says the wide F1.8 aperture is what produces the blurry backgrounds and the low-light performance.

**Does the Canon RF 50mm F1.8 STM have image stabilisation?**

The spec table lists "Optical" under Image Stabilisation Type, but none of the six product bullets mentions stabilisation. The STM Stepping Motor is the only focusing mechanism the description refers to.

**Which cameras does the Canon RF 50mm F1.8 STM fit?**

Canon states it is compatible with all Canon EOS R series mirrorless cameras, and one bullet names the EOS R100, R50, R10, R6, R7 and R8 as the EOS R models it works with.

**How much does the Canon RF 50mm F1.8 STM weigh?**

A description bullet gives 160g and 40.5mm, describing the lens as one that slips in the bag or stays discreet on the camera.

**What is the price and rating of the Canon RF 50mm F1.8 STM?**

The listing shows £183.00, with a rating of 4.7 from 1,850 ratings.

**What filter size does the Canon RF 50mm F1.8 STM take?**

The spec table gives a Photo Filter Size of 43 Millimeters, while a description bullet states 40.5mm for the lens itself.