Our review. The EF 40mm F2.8 STM offers excellent image quality in a tiny, well-made package. For APS-C users it provides a great carry-everywhere complement to a kit zoom, and for full frame shooters it's an excellent general-purpose 'normal' lens. The STM motor means that autofocus is almost completely silent, but it's not super-fast.
Zoom in for larger view of Canon RF 24mm f/1.8 MACRO IS STM - 5.5 stops of shake correction, 6.5 when coordinated with your Canon EOS R camera's in-body image stabilization Canon RF 24mm f/1.8 MACRO IS STM - Stepping motor ensures smooth, quiet autofocus Review manufacturer specifications and detailed lab measurements for the Canon EF 50mm f/1.8 STM Lens. Compare the specs and measurements of this lens with other lenses.
Let's compare the EF 24mm f/2.8 IS USM lens to the EF-S 24mm f/2.8 STM lens. Both lenses will fit on a crop body, and will yield the same field of view and depth of field. If you were able to mount the EF-S lens on a full frame (and avoided hitting the mirror), you would find that both the EF-S and EF lenses yielded the same field of view and
50mm at f/1.8 is radically different from 50-55mm at f/5.6, so the prime has a decided advantage here. However, 24mm at f/2.8 is not so radically different from 24mm at f/3.5. One option you may wish to consider is the 10-18 STM + 24 STM + 50 STM (would be nice if Canon made a 10 / 2.8 STM and 15 / 2.8 STM -- perhaps they will, in time).
EOS M6 + EF 24mm f/1.4 USM II (left) and the EOS M + EF 22mm f/2 STM lens (right) I removed the even larger Canon brand lens hood and replaced it with this one (left) to cut down on size. The EF-M lens doesn't require a lens hood although canon make a strange little tubular one that nobody else seems to buy. cIvv. 242 153 103 261 215 279 19 169 128

canon ef 24mm f 1.8 stm