How does the Canon EF 50mm f/1.8 STM compare to other lenses in low-light scenarios

1. Compared to kit lenses:
The 50mm f/1.8 STM has a significant advantage over typical kit lenses like the 18-55mm f/3.5-5.6. At 50mm, the kit lens would be at f/5.6, while the 50mm prime opens up to f/1.8. This difference allows the 50mm f/1.8 to gather about 8 times more light[5]. In practical terms, this means you can use much faster shutter speeds or lower ISO settings in the same lighting conditions.

2. Light gathering ability:
The f/1.8 aperture gathers approximately 4 times more light than an f/3.5 aperture and 8 times more light than an f/5.6 aperture[2]. This translates to significantly better low-light performance.

3. Shutter speed advantage:
The wider aperture allows for much faster shutter speeds in low light. For example, a shot that might require 1/20s at f/5.6 could be taken at around 1/160s or 1/200s at f/1.8[5]. This helps reduce motion blur and camera shake in low-light situations.

4. ISO performance:
The ability to use lower ISO settings in low light results in less noise and better overall image quality[2]. This is particularly beneficial for older or entry-level cameras with limited high-ISO performance.

5. Versatility in shooting conditions:
Users report being able to experiment with shooting at different times of day, including darker conditions, without as much concern about available light[2].

6. Comparison to higher-end lenses:
While the 50mm f/1.8 STM performs very well in low light, it's worth noting that there are even faster lenses available, such as the Canon 50mm f/1.4 or f/1.2 versions. These lenses gather even more light but come at a significantly higher cost[4].

In summary, the Canon EF 50mm f/1.8 STM offers a dramatic improvement in low-light performance compared to kit lenses and many zoom lenses. Its wide maximum aperture allows for faster shutter speeds, lower ISO settings, and better overall image quality in challenging lighting conditions. This makes it an excellent and affordable option for photographers looking to improve their low-light shooting capabilities[4][5].