E-49-774 12.7mm Dia. x 31.8mm FL, VIS 0° Coated, Achromatic Lens
E-49774 12.7mm Dia. x 31.8mm FL, VIS 0° Coated, Achromatic Lens
Diameter (mm): 12.70 +0.00/-0.025
Effective Focal Length EFL (mm): 31.75
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 28.83
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 11.70
Centering (arcmin): <1
Center Thickness CT 1 (mm): 4.00
Center Thickness CT 2 (mm): 1.75
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 21.13
Radius R2 (mm): -16.69
Radius R3 (mm): -61.73
Edge Thickness ET (mm): 4.45
Surface Quality: 40-20
f/#: 2.5
Numerical Aperture NA: 0.20
Coating: VIS 0° (425-675nm)
Coating Specification: Ravg ≤0.4% @ 425 - 675nm
Power (P-V) @ 632.8nm: 1.5λ
Irregularity (P-V) @ 632.8nm: λ/4
Bevel: Protective bevel as needed
Type: Achromatic Lens
Wavelength Range (nm): 425 - 675