Frequently Asked Questions
Expert answers to your questions about high-performance optical filters and accessories.
How do I determine which filter size fits my lens?
You can find your lens's thread size printed on the front or side of the lens barrel, usually preceded by a diameter symbol (ø). For example, ø77mm means you need a 77mm STC filter.
What makes STC optical glass different from standard filters?
STC filters utilize high-quality Schott B270 glass and specialized CNC construction. Our filters feature double-sided NANO anti-smudge coating and are chemically strengthened to ensure maximum durability and light transmission.
Do you offer international shipping for optical gear?
Yes, we ship our optical products worldwide. Shipping costs and delivery times vary by destination and are calculated at checkout. Please note that international orders may be subject to local import duties.
What is your return policy for damaged or defective items?
We offer a 30-day return policy for any manufacturing defects. If your filter arrives damaged or shows optical irregularities, please contact our support team immediately with your order number and photos of the issue.
How should I clean and maintain my STC filter?
We recommend using a specialized lens blower to remove dust first, followed by a clean microfiber cloth. Thanks to our NANO coating, fingerprints and water spots can usually be wiped away easily without harsh chemicals.
Are STC Clip Filters compatible with all camera sensors?
Our Clip Filters are designed for specific camera mounts and sensor sizes (Full Frame or APS-C). Please check our compatibility chart on the product page to ensure the filter fits your specific camera body model.