If you have an account in one of the services listed below, you can use it to create an account and for the future sign in process.
If you have an earlier-created account you can merge it with the login details to your favorite site, for your own convenience. To do this, first sign in and go to your personal details edition, where you can find account merging tools.
I have used Mylenshop for a few years now. Service is always good and Customer service is really good (only had to use it once). Lenses are really good and prices are competitive. I had recommended it to my friends and will do so in the future.