Canon EF 40mm f/2.8 STM Lens Sharpness Tested on R5

Summary

Christopher Frost re-evaluated the Canon EF 40mm f/2.8 STM pancake lens on modern mirrorless bodies, specifically the Canon EOS R5 and R7. On the R5, the lens exhibits strong center sharpness at f/2.8, with corners improving significantly by f/5.6. The APS-C R7 shows good center performance from f/2.8, with corners resolving well at f/5.6 or f/8. While autofocus is slow and audible, especially for video, the lens offers pleasant bokeh and a useful 40mm focal length.

Key points

• Canon EF 40mm f/2.8 STM lens shows strong center sharpness on the EOS R5.
• Corner sharpness on the R5 is excellent by f/5.6.
• Autofocus is slow and audible, particularly for video applications.
• The lens offers a useful 40mm focal length and pleasant bokeh.