The autofocus speed comparison between the Canon EF 50mm f/1.8 STM and the EF 50mm f/1.8 II reveals distinct characteristics for each lens:
Autofocus Speed
- EF 50mm f/1.8 STM: This lens features a stepping motor (STM) that provides smoother and quieter autofocus. While it is generally accurate, its speed is not significantly faster than the II version. The STM is designed to perform well in video applications and low-light conditions, allowing for a more fluid focus transition, especially when using Dual Pixel AF in live view mode. However, it may not be the fastest option available compared to lenses with ultrasonic motors (USM) [1][5].- EF 50mm f/1.8 II: This lens is known for its faster autofocus speed, although it is noisier compared to the STM version. It focuses quickly, making it suitable for capturing fast-moving subjects. However, the accuracy and smoothness of the focus may not match that of the STM lens, particularly in quieter environments or when shooting video [1][4].
Summary
In summary, while the EF 50mm f/1.8 II focuses faster, the EF 50mm f/1.8 STM offers smoother and quieter operation, making it more versatile for video and low-light conditions. The choice between the two may depend on the specific needs of the photographer, such as whether speed or quiet operation is prioritized.Citations:
[1] https://www.reddit.com/r/canon/comments/n3205f/whats_the_difference_between_the_50mm_18_stm_and/
[2] https://versus.com/en/canon-ef-50mm-f-1-8-ii-vs-canon-ef-50mm-f-1-8-stm
[3] https://snapshot.canon-asia.com/article/eng/rf50mm-f18-stm-vs-ef50mm-f18-stm-6-key-comparisons
[4] https://photo.stackexchange.com/questions/65116/canon-50mm-f-1-8-stm-vs-canon-50mm-f-1-8-ii
[5] https://dustinabbott.net/2015/06/canon-ef-50mm-f1-8-stm-review/