bk 7 half ball lenses

{"cid":"91201126","title":"43mm Optical Glass Lens For Underwater Photography , 1.5 To 300mm Half Ball Lenses","imgUrl":"https:\/\/img.chinax.com\/nimg\/3d\/c1\/a321e492f3e9d57d56b8aac8bb25-200x200-1.jpg","attrs":{"Price":"$0.2~$100","Brand Name":"Advance","Model Number":"as requirements","Minimum Order Quantity":"1","Delivery Time":"3~30days after order","Place of Origin":"China","Packaging Details":"EVA+Vacuum","Supply Ability":"1000k\/per month","Customized support":"OEM, ODM","Usage":"Optical","Structure":"custom","Material":"Optical Glass","Diameter tolerance":"+\/-0.005mm","Focal Length":"150mm","Distortion":"<2%","Damage Threshold":"50J\/C\u33a1","Screw Thread":"As Requirement","Application area":"Imaging,Lighting,Laser etc","Certification":"ROHS\\Reach","Payment Terms":"T\/T&L\/C","Interface Type":"Canon EF-S","Diameter":"25 mm","Centerthickness":"5 mm","Width Tolerance":"+\/-0.01mm","Style":"Antique","Application Area":"Lighting,Laser etc","Shape":"Spherical","Focal Length Tolerance":"+\/-1%","Operatingtemperature":"-20 to 70 \u00b0C","Filter Ring Color":"Black,Sliver,Gold","Coating Choice":"Green","Refractiveindex":"1.52"}}

{"cid":"91213983","title":"60 Scratch Dig Half Ball Lens Easily Positioned Biconvex Optical Lens","imgUrl":"https:\/\/img.chinax.com\/nimg\/64\/18\/9fb53e840217baa548309f89eb2e-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"STAR OPTIC","Model Number":"BALL","Minimum Order Quantity":"5pcs","Delivery Time":"Negotiable","Certification":"RoHS, ISO9001","Place of Origin":"Wuhan, China","Payment Terms":"T\/T, Western Union, Paypal","Supply Ability":"50000pcs\/Month","Packaging Details":"Safe and dust-free packing","Product Name":"Half Ball Lens","Material":"BK7, UVFS, ruby, sapphire and other high index glass, and germanium, ZnSe, ZnS.","Clear Aperture":">90%","Usage":"Coupling between fibers, emitters, and detectors","Diameter":"0.5mm to Custom Size","Application":"Endoscopy"}}