Privacy Policy
This page explains what personal data opsidor.com collects, why, and what you can do about it. We keep it short because we collect very little.
Who is responsible
The data controller for this website is Zero Opti LTD, Bulgaria, which operates opsidor.com. The handbook "Optics: from light to the lens" is published under the name OPSIDOR. You can contact us at info@opsidor.com.
What the site collects, and why
- Contact form. If you use the form, we receive your name, your email address and your message. We use them only to reply to you. Legal basis: our legitimate interest in answering your enquiry (Article 6(1)(f) GDPR).
- Email. If you write to info@opsidor.com, we receive your address and message, for the same purpose and on the same basis. The mailbox forwards to a private inbox.
- Calculators. The calculators on the page run in your browser. The values you type are not sent to us.
- Technical data. When you open the site, the host processes your IP address and basic request data to deliver the page and keep it secure. Legal basis: legitimate interest in running a secure website.
The site does not use advertising trackers or analytics, and it does not set cookies of its own. The fonts are served from this site, so your browser does not contact Google or any other font service.
Purchases
The guide is not sold on this site. It is sold through a third-party sales platform, which handles the order, the payment and the delivery. Your payment details are entered on the platform and are processed by it, not by us. The platform acts as a controller for that data, and its own privacy policy applies. We may receive limited order information from the platform, such as your name, email address and order details, to deliver the guide and answer questions about your order. Legal basis: performance of the contract, and legal obligations for accounting records.
Services that process data for us
- Netlify hosts the site.
- Web3Forms receives the contact form submissions when you send the form and passes them to our inbox. It stores submissions in its database for up to three years, and it sends the sender's IP address and email address to anti-spam services (CleanTalk and Akismet). See its privacy policy.
- Namecheap provides the domain and the email forwarding for info@opsidor.com.
Some of these providers are based in the United States, and Web3Forms operates from India. Where your data is transferred outside the European Economic Area, this relies on the EU-US Data Privacy Framework or on Standard Contractual Clauses, depending on the provider.
How long we keep data
We keep messages for up to 12 months after the conversation ends, and delete them afterwards, including the copy held by the form service. If we do not delete a copy earlier, the form service removes it automatically after at most three years. Records of purchases are kept for as long as accounting and tax rules require.
Your rights
You can ask us to show you the personal data we hold about you, correct it, delete it, or give it to you in a portable format. You can also object to how we use it or ask us to limit it. To do any of this, write to info@opsidor.com. You also have the right to complain to a data protection authority. In Bulgaria this is the Commission for Personal Data Protection (cpdp.bg); you may also contact the authority in your own country.
Changes
If we change this policy, we will update the date at the top of this page.