I'm currently shooting with a Canon EF 1.8 50mm. I like this lens — it's pretty sharp and the shallow depth-of-field at F1.8 is great.
But I always face a problem using auto-focus: almost every shot is not sharp when taking photos at f/1.8. So I have to stop it down to 3.5 or even more to get the subject really sharp.When taking shots of people in low-light, this is useless. I have to do manual focusing (in live-view) which takes to much time for quick shots of people.
Because of this I'm thinking about switching to the Canon EF 50mm f/1.4. Here are my questions:
- Has anyone experience with auto-focus (maybe even in comparison to the 1.8)? How precisely does it work, especially at 1.4?
- What is the difference between 1.4 and 1.8 (has someone an example picture with 1.4 and 1.8 to see the depth-of-field and may also the exposure times?)
- Would you recommend I switch at all, or stick with the 1.8 since it doesn't make much sense for my purposes?