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      Usefull Tools

Focal length Calculator for singlet lens
    A useful tools for calculating focal length of singlet lens.
    Including 4 glass databases
    Calculated results including edge thk, bfl, ffl, weight.
    Automatically search similar products in our database.

Focal length Calculator for muti-lenses
    Max. 10 lenses.
    Calculated results including efl, bfl, ffl.

Centration

Sag & Radius

Optical Density & Transmission

Optical dictionary
    A useful dictionary for optical glossary

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