Frequently Asked Questions
Everything you need to know about our premium optical solutions.
What makes STC filters different from other optical brands?
STC utilizes state-of-the-art ion-beam sputtering (IBS) technology and premium SCHOTT glass to ensure high color fidelity, durability, and minimal light reflection for professional results.
Do you offer international shipping for optical gear?
Yes, we ship our filters and optical accessories worldwide. Delivery times typically range from 5 to 14 business days depending on your location and selected shipping method.
How do I determine the correct filter thread size for my lens?
You can find your lens thread size marked on the front or side of your lens barrel, preceded by a 'ø' symbol (e.g., ø77mm). Ensure you match this number with the filter size you order.
What is your return policy for damaged or defective items?
We offer a 14-day return window for products with manufacturing defects. Please contact our support team with your order number and photos of the issue to initiate a replacement.
Are STC Clip Filters compatible with all camera sensor types?
Our Clip Filters are specifically designed for various full-frame and APS-C mirrorless and DSLR bodies. Please check our compatibility chart to ensure the filter fits your specific camera model and sensor.
Does the optical coating interfere with autofocus performance?
No, our ultra-slim frames and high-transmission coatings are engineered to maintain full communication between your lens and camera body, ensuring zero interference with autofocus or image stabilization.