NEW Thorlabs AC254-500-A1 Ø1″ Unmounted Visible Achromat Doublet f=500.0mm ARC=4
Specifications are from Thorlabs and may vary slightly due to upgrades, options, or revisions this unit may or may not have. Design Wavelengths for A1 Coating: 486.1, 587.6, and 656.3 nm. avg < 0.5% from 400-700 nm (A1 coating range).