Type
                                                    Circular Continuous ND Filters
                                                    
                                                 
                                            
                                                
                                            
                                                
                                                    Thickness Tolerance (mm)
                                                    ±0.25
                                                    
                                                 
                                            
                                                
                                            
                                                
                                            
                                                
                                            
                                                
                                                    Damage Threshold (pulsed)
                                                    7.5 J/cm2 (10ns/10Hz)
                                                    
                                                 
                                            
                                                
                                            
                                                
                                            
                                                
                                                    Spectral Range (nm)
                                                    250-2500
                                                    
                                                 
                                            
                                                
                                                    Metallic Coating Area Angle (degree)
                                                    0° - 270°
                                                    
                                                 
                                            
                                                
                                            
                                                
                                                    Hole Diameter Tolerance (mm)
                                                    +0.25/-0
                                                    
                                                 
                                            
                                                
                                            
                                                
                                                    Optical Density Range
                                                    0.04-4.0
                                                    
                                                 
                                            
                                                
                                            
                                                
                                                    Outside Diameter Tolerance (mm)
                                                    +0/-0.25