


Custom Mattebox Clamp-On Ring / Donut
Crafted in-house in Europe and inspired by a passion for cinematic excellence, our lens gears deliver smooth, slip-free performance for any shoot. From dedicated focus and zoom rings to HardStop and universal fits, every piece reflects our commitment to precision, durability, and creative freedom.
A custom-fit adapter ring designed to eliminate glare and light spill while still allowing the use of circular filters. Precisely made for a seamless, secure fit, ensuring optimal light control without unnecessary bulk.
Key Features:
✔ Custom Fit for Your Lens – Tailored to your exact lens dimensions for a flawless, glare-free connection.
✔ Compatible with Circular Filters – Unlike standard clamp-on adapters, this allows you to continue using screw-on filters.
✔ Effortless Installation – Snaps on and off easily, making setup quick and hassle-free.
✔ High-Quality & Durable – Crafted with the same precision and attention to detail as our Follow Focus Rings for a perfect fit and long-lasting performance.
✔ Cost-Effective & Versatile – More affordable and adaptable than other options on the market.
🛑 Ordering the "Custom" Variation?
You need to measure the following:
1. Lens front diameter
2. Mattebox opening diameter
3. Required Thickness / Height
Be sure to measure the actual front diameter of your lens—filter thread size alone will not work!
Pairs well with

Custom Mattebox Clamp-On Ring / Donut
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
We ship worldwide with trusted carriers to deliver your items safely. You can see estimated delivery times at checkout, and once your order ships, we’ll email you a tracking link so you can follow its progress.
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Customer Support
Whether you need product advice or help with a return, check out our Contact Page or get in touch directly via the orange chat button. We’re happy to assist, no matter the query.
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FAQ’s
Want quick answers? Browse our FAQ section for common questions about orders, returns, and more. If you don’t find what you need, we’re just a message away!
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Contact Us
Still need help? We love hearing from you. Reach us by email at tom@filmatura.com or use our Contact Form. We’ll do our best to get back to you quickly.
FAQs
Please read our FAQs page to find out more.
How do i measure the required measurements?
We recommend a set of quality digital calipers - however, a ruler works as well.
Do you ship internationally?
Absolutely. We ship worldwide, and rates are calculated at checkout based on your location. We offer FedEx Express (2-7 Days) as well as Economy shipping.