Does maximum aperture matter?
You pay more for ‘fast’ lenses –but do you really need the speed?
The maximum aperture in the lens description can be an important consideration when you’re looking for a new prime or zoom. Some zoom lenses have a range of apertures instead of a single aperture.
This means that the maximum aperture gets smaller as you zoom. The Canon RF 24-105mm F4L IS USM offers aconstant f/4 maximum aperture throughout the zoom range for example, whereas the maximum aperture on the cheaper RF 24-105mm F4-7.1 IS STM decreases from f/4 at 24mm to only f/7.1 at 105mm.