9526682

Focus length, mm: +330.0 (±3%) @ 633 nm
Surface quality, S1/S2: 20/10 S/D
Surface irregularity, P-V, S2: <λ/4@633 nm per CA
S1 Flatness, PV: <λ/4@633 nm per CA
Material: UVFS (Corning 7980 0F)
Edge thickness, mm: 2.0 (±0.1)
Diameter, mm: 25.4 (+0.0/-0.1)
Coatings: N/A
Clear aperture: >90%
Centration error: <3 arcmin
Protective chamfers: <0.25 mm x 45°