Q1: What cameras are compatible with the BTL-71M Series telecentric lens?
A: The BTL-71M Series supports large-format machine vision cameras with 39mm sensor size and is compatible with M42/M58 mounts for high-resolution AOI and measurement systems.

Q2: What are the main advantages of a bi-telecentric lens?
A: A bi-telecentric design provides constant magnification, minimal perspective distortion, and accurate dimensional measurement for precision inspection applications.

Q3: What applications are suitable for the BTL-71M Series?
A: It is ideal for AOI inspection, PCB inspection, electronic component inspection, precision measurement, and mechanical part inspection requiring high-resolution imaging.

Q4: Can this lens be used with high-resolution AOI cameras?
A: Yes. The BTL-71M Series is optimized for high-resolution area scan cameras, providing sharp imaging performance for detailed defect detection and automated inspection.

Q5: What working distance options are available?
A: The series offers multiple working distance options from 110mm to 465mm, allowing flexible integration into different machine vision systems.

Q6: Is the back focal length adjustable?
A: Yes. Models marked with (LM) feature an adjustable back focal length for easier camera matching and system calibration.

🧾 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.