wide-angle lens--A lens whose effective focal length ( EFL) is considerably shorter than the diagonal dimension of the image it forms.
Changchun Fortune Optronics, Inc. is located in Changchun city, North China.We are specialized in manufacturing precision optical components, such as lens, achromatic lens, cylindrical lens, ball....
( Type 1: JNT-NT-1; Chemical Composition: Fe ( 25-35% ) , C ( 1.5% maximum) , O ( 3% maximum) , Ni ( balance) ; granularity: 0.5-2.0um.) ( Type 2: JNT-NT-2; Chemical Composition: Fe ( 60-70% ) , C ( 1.5% maximum) , O ....
Our company is the biggest base for producing nickel salt, carbonyl nickel powder and carbonyl iron powder in China and the largest nickel sulfate manufacturer in the world at present. Relying on the....