Apochromatic Objectives

Special low dispersion glasses allow for the design of lenses which are chromatically corrected for a range of wavelengths. Such lenses are referred to as having minimal secondary spectrum. Camera lenses are an extreme example of apochromatic lenses.

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Model Description
54-8-35N Objectives Chromatically Corrected for a Specific Wavelength Range
Specs & Docs
Specifications
Aperture (mm) 8
Back Focal Length (mm) -35.9
Effective Focal Length (mm) -34.6
F/# -4.3
Outside Diameter (mm) 12.5
Wavelength Range (nm) 700 - 900
54-40-100 Objectives Chromatically Corrected for a Specific Wavelength Range
Specs & Docs
Specifications
Aperture (mm) 40
Back Focal Length (mm) 95.05
Effective Focal Length (mm) 99.9
F/# 2.5
Outside Diameter (mm) 50.8
Wavelength Range (nm) 700 - 900
54-54-540 Objectives Chromatically Corrected for a Specific Wavelength Range
Specs & Docs
Specifications
Aperture (mm) 54
Back Focal Length (mm) 523.0
Effective Focal Length (mm) 540.0
F/# 10.0
Outside Diameter (mm) 60.0
Wavelength Range (nm) 200 - 400
54-22-40 Objectives Chromatically Corrected for a Specific Wavelength Range
Specs & Docs
Specifications
Aperture (mm) 22
Back Focal Length (mm) 22.8
Effective Focal Length (mm) 40.0
F/# 1.8
Outside Diameter (mm) 28.6
Wavelength Range (nm) 480 - 550 & 1065
54-12-180 Objectives Chromatically Corrected for a Specific Wavelength Range
Specs & Docs
Specifications
Aperture (mm) 12
Back Focal Length (mm) 173.5
Effective Focal Length (mm) 179.2
F/# 15.0
Outside Diameter (mm) 25.4
Wavelength Range (nm) 300 - 365
54-25-350 Objectives Chromatically Corrected for a Specific Wavelength Range
Specs & Docs
Specifications
Aperture (mm) 24
Back Focal Length (mm) 362.0
Effective Focal Length (mm) 369.2
F/# 15.0
Outside Diameter (mm) 38.1
Wavelength Range (nm) 250 - 400
54-40-174 Objectives Chromatically Corrected for a Specific Wavelength Range
Specs & Docs
Specifications
Aperture (mm) 40
Back Focal Length (mm) 163.7
Effective Focal Length (mm) 173.0
F/# 4.3
Outside Diameter (mm) 50.8
Wavelength Range (nm) 700 - 900
54-2-7 Objectives Chromatically Corrected for a Specific Wavelength Range
Specs & Docs
Specifications
Aperture (mm) 2
Back Focal Length (mm) 5.9
Effective Focal Length (mm) 7.1
F/# 3.6
Outside Diameter (mm) 6.4
Wavelength Range (nm) 400 - 700
54-22-79 Objectives Chromatically Corrected for a Specific Wavelength Range
Specs & Docs
Specifications
Aperture (mm) 22
Back Focal Length (mm) 73.2
Effective Focal Length (mm) 79.0
F/# 3.6
Outside Diameter (mm) 28.6
Wavelength Range (nm) 400 - 700
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