Which prime lens is the best one for getting really sharp portraits on a Sony camera because I am totally lost? I just got the a7iii and I thought it would just take amazing photos automatically but they look kinda basic with the lens that came in the box. Everyone on YouTube says I need a prime lens for that pro look but there are so many numbers and I dont understand any of them. Is a bigger number better? I keep seeing 50mm and 85mm and I dont know which one is for portraits.

I have a budget of about 600 dollars maybe 700 if I really stretch it but I'm really anxious about spending that much and getting something that doesnt work for what I need. My sister is getting married next month in Chicago and I'm supposed to be taking her getting ready photos and some portraits of her in her dress. I am so scared I am going to fail her and the pictures will be blurry or just look like I took them on my phone. I honestly have no idea where to start and every time I search for sharpest lens I get these long articles with graphs that make my head spin.

I really need something that makes the eyes look super sharp and clear while making the background look like that soft cream stuff. Is that the f-stop thing? Someone mentioned a Sony 85mm lens but then someone else said Sigma is cheaper and better? I dont even know if other brands fit on my camera or if I need an adapter thingy or if it just clicks on.

• Do I need a 1.8 or a 1.4 or does that even matter for sharpness?
• Is 85mm too zoomed in if we are in a small room while she is getting her hair done?
• What is the easiest lens for a total beginner who has no idea what they are doing?

I'm sorry if these are really dumb questions but I'm just panicking a little bit because the wedding is so close and I still havent bought a lens yet...