Walther Diopter extension

Strictly necessary cookies are those that enable the basic functions of a website. Without them, the website will not work properly.

To view YouTube contents on this website, you need to consent to the transfer of data and storage of third-party cookies by YouTube (Google). This allows us to improve your user experience and to make our website better and more interesting. Without your consent, no data will be transferred to YouTube. However, you will also not be able to use the YouTube services on this website.

To view Vimeo contents on this website, you need to consent to the transfer of data and storage of third-party cookies by Vimeo.. This allows us to improve your user experience and to make our website better and more interesting. Without your consent, no data will be transferred to Vimeo. However, you will also not be able to use the Vimdeo services on this website.

To submit forms on this page, you need to consent to the transfer of data and storage of third-party cookies by Google. With your consent, reCAPTCHA, a Google service to avoid spam messages via contact forms, will be embedded. This service allows us to provide our customers with a safe way to contact us via online forms. At the same time, the service prevents spam bots from compromising our services. After you gave your permission, you might be asked to answer a security prompt to send the form. If you do not consent, unfortunately you cannot use the form. Please contact us in a different way.

To send data to Brevo, you need to consent to the transfer of data and storage of third-party cookies by Brevo. This allows us to improve your user experience and to make our website better and more interesting.