A:   Yes, we are a professional manufacturer of optical components, we have more than10 years experience in optical cold working.  
                     
                 
                    
                           A:   Generally we process the lens  according to the drawings, so there is no sample before placing an order.  
                     
                 
                    
                           A:   Yes, we can custom the material, specifications and optical coating for your optical components as your requirement.  
                     
                 
                    
                           A:   Usually 50% as deposit, and 100% before delivery. We would show you the photos of the products before you pay the balance.  
                     
                 
                    
                           A:   Generally, it takes 7 to 20 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.