Q1: What cameras are compatible with the BTL-21 Series telecentric lens?
A: The BTL-21 Series supports large-format 2" sensors and is available with M42/M58 mounting options for industrial cameras.

Q2: What applications is this lens designed for?
A: It is designed for AOI, dimensional measurement, semiconductor inspection, PCB inspection, and precision machine vision systems.

Q3: What is the advantage of a bi-telecentric lens?
A: A bi-telecentric design maintains consistent magnification and minimizes perspective errors, improving measurement accuracy.

Q4: Does the BTL-21 lens support large field-of-view inspection?
A: Yes. The series provides FOV options up to 300mm for large-area inspection applications.

Q5: What is the distortion performance of this lens?
A: The BTL-21 Series achieves distortion below 0.1% for accurate image analysis and measurement.

Q6: Can the lens be customized for specific vision systems?
A: Yes. Different magnification, working distance, and mounting configurations are available to meet specific inspection requirements.

🧾 International Shipping & Import Duties
All orders are shipped from our warehouse in China. Import duties, taxes, and customs fees may apply depending on your country's regulations and are the responsibility of the customer. If your shipment requires a Tax ID, VAT number, EORI number, or other customs information, please email it to info@rapixeltech.com after placing your order to help avoid customs clearance delays.

Additional Requirements for U.S. Customers
Due to U.S. import tariffs and customs requirements, please provide your company name and your FedEx, UPS, or DHL account number to info@rapixeltech.com after placing your order. This helps ensure smooth customs clearance and delivery.

💳 Payment Processing Fees
Payment processing fees are non-refundable. If an order is refunded, a processing fee of 2.5%–6% (depending on your payment method) will be deducted. These fees are charged by Shopify Payment, not by Rapixel Tech.

✅ Made-to-Order Products
Most of our products are made to order or prepared specifically for your purchase. Please confirm your requirements before placing your order. If you have any questions, feel free to contact info@rapixeltech.com before purchasing.

● Please kindly be informed that we do not accept returns or exchanges for any reason other than product defects or quality issues. 

● Before placing the order, all customers need to take the responsibility to confirm that the selected product is suitable for your needs and meets your intended application, and we are not responsible for any customer's application. Accordingly please note the following return or exchange requirements will be rejected.
>Misunderstanding or incorrect product selection
>Mismatch for intended use
> Other reasons for personal dissatisfaction

● We are confident to ensure that all our products could reach 100% qualified in QC and QA when they are ready for shipping. But in case any product you receive is damaged, defective or does not match the description provided, you always have the objection period of 3 working days from the receiving date, among when you could submit all your queries or any other comments.

We appreciate your understanding and cooperation in supporting our return and exchange policy. Thank you for shopping, and we look forward to serving you any time.