It was very difficult for me to initially decide how to choose a shop that sells optics and lenses. But in order to make the right choice I had to read reviews and customer reviews. I think you need to go to this
https://revain.org/reviews/suss-microoptics link to the website and read reviews and reviews of the first company to sell lenses and optics. I think you will find it very interesting and even useful to read these reviews.