bk 7 optical glass spherical 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":"91191224","title":"customized rough sapphire optical cube blocks for optical spherical cover","imgUrl":"https:\/\/img.chinax.com\/nimg\/dd\/2c\/5fa93c585bce2ac7516aec69e524-200x200-1.jpg","attrs":{"Price":"2200usd\/pcs","Brand Name":"zmkj","Model Number":"168x103x105mmt","Minimum Order Quantity":"1pcs","Delivery Time":"1-3weeks","Place of Origin":"CHINA","Payment Terms":"T\/T, Western Union, MoneyGram","Supply Ability":"100-500pcs per month","Packaging Details":"packed in Capacitor paper +Sponge paper+paper case","material":"sapphire optical grade","Orientation":"C-axis A-axis M-axis","Surface S\/D":"lapped","Tolerance":"\u00b10.1mm","application":"for Aspherical dome","grade":"optical grade without bubble;color","size":"168x103x105mmt"}}