I only have 1 prime - the 50mm 1.8. It's generally fine, but I find it struggles with AF (both speed and accuracy) in low light, which is starting to bother me. Also I wish it was a tad sharper wide open. Generally, I'm looking for something that will give me better AF performance and slightly better IQ (not just sharpness but color rendering, microcontrast, etc.)
I primarily shoot people, for events/parties and such. I shoot mostly in a candid style rather than posed portraits. Probably 70% indoors, 30% outdoors. For budgetary/ practical reasons, I'm looking to just get one prime lens, and the following are what I'm considering, with my thoughts on each:
35mm f/2 IS : Definitely best IQ of the bunch I'm considering, cost fits in my budget. But 35mm is not usually a FL I like for my style of shooting people, I prefer it more as a general walkaround lens. But I might be able to make this work.
50mm 1.4 : 50mm is my preferred FL for the type of shooting I do. It's like a goldilocks FL, just right for basically everything. That being said I already have the 1.8, not sure if the 1.4 would be a huge improvement, and I don't have the budget for 1.2 or the new Sigma, and the older Sigma puts me off due to the reported inconsistencies with focusing.
85m 1.8: Would give me a slightly different FL and perspective to work with, great lens. But I probably won't use it as much, generally wouldn't be a "one-lens" solution that the 35mm or 50mm could be for my shooting.
Would love to gather opinions and thoughts on this issue.


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