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telecentric fixed focal length resource guide 122 +44(0) 1904 788600 | Edmund Optics® Specialty Lenses
Schneider Fast C-Mount Lenses
• Helical Focus Movement
• Click-Stop Free Iris Setting
• External Iris & Focus Lock
Designed for extremely low light situations, the high aperture (f/0.95) of these lenses provides excellent image quality
even under low light conditions. These lenses are designed to cover the visible spectrum (400 - 700nm). Locking
focus and iris prevent change in stressful environments. The front filter thread allows the use of color filters to increase
contrast, for increased accuracy of sorting, picking or measuring applications, or reducing glare with polarizing filters.
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Typical Transmission
• Simultaneously Images Top and Sides of an Object
• Can be used as a Long Working Distance Borescope
• Ideal for Component Inspection
TECHSPEC® Hypercentric Lenses provide a converging view of an object, focusing on the top and surrounding
sides simultaneously, and are used to eliminate the need for multiple camera and lens setups in machine
vision inspection or identification applications. TECHSPEC® Hypercentric Lenses are ideal for inspecting
parts such as pharmaceutical vials, batteries, or automotive parts. These lenses provide a conical-shaped
working area, and are optimized for use with monochromatic light. When 0.5 - 1.5mm spacers are positioned
between the lens and camera, these lenses can also be used as long working distance borescopes, simultaneously
focusing on the internal walls and bottom surface of an object. The borescope working distance is the
area past the convergence point (CP) of the standard working area. The use of larger spacers increases the
borescope focus distance. Note: All specifications are defined at 660nm.
TECHSPEC® Hypercentric Lenses *Circular Image is Produced on Maximum Sensor Format
Sensor Format (Vertical)* 1/3" 1/2" 2/3"
Convergence Point Distance (CPD) (mm): 28.2 28.2 28.2
T (Near Aperture) (mm): 37.2 37.2 37.2
B (Far Aperture) (mm): 9.4 10.4 11.5
Max. View Angle (MVA) (˚): 33 33 33
Max. Working Distance (WD) (mm): 21.1 20.1 19.5
Max. Depth of Field (mm): 18 14 9.5
Dimensions (Dia. x L) (mm): 55.9 x 167 55.9 x 160 55.9 x 158
Stock No. #86-584 #86-585 #86-586
Price £2,205.75 £2,252.50 £2,290.75
Schneider Fast C-Mount Lenses
Focal Length
(mm)
Max. Sensor
Format
Aperture
f/#
UV Fixed Focal Length Lenses
Image of a dice using a Hypercentric Lens
Angular
FOV (°)
Geometric
Distortion (%)
FOV at
Min. WD (mm)
Min. Working
Distance (mm)
Filter
Thread
Stock No. Price
25.0 1" f/0.95 - f/11 20 < -3 76.8 300 M39 x 0.5 #59-833 £1,763.75
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Wavelength (nm)
Transmission (%)
— #57-542
— #57-543
— Ordinary Lens
• Transmission from 230 - 1200nm
• Compact Size for Easy System Integration
• Ideal for Use with Mounted Color Filters
UV Fixed Focal Length Lenses are ideal for use in a variety of applications, including
the surface inspection of circuits or fiber optics, quality control of semiconductor
materials, or for locating oil contamination or leakage. Additional applications include
forensic, pharmaceutical, or biomedical imaging, fluorescence, security, or counterfeit
detection. UV Fixed Focal Length Lenses are manufactured from fused silica elements
to provide excellent transmission from the ultraviolet to the near-infrared.
Note: These lenses are not corrected for chromatic aberration, and require refocusing
when using an illumination source with a spectral bandwidth greater than 10nm.
A monochromatic light source and narrow bandpass filter are recommended to improve
the overall performance of the lens. The 78mm lens (#57-543) has a removable
C-mount adapter, enabling it to be used with M42 x 0.75 (T2) mounts.
UV Fixed Focal Length Lenses *Horizontal Field of View; calculated for 1/2" format sensor
Focal Length
(mm)
Max Sensor
Format Aperture f/# Angular* FOV
(Horiz.)
FOV* at
Min. WD
Minimum
WD
Spectral
Range (nm)
Dimensions (mm) Weight
(g)
Filter Thread
(Dia. x Pitch) Stock No. Price
Max Dia. Length
25 1" f/2.8 - f/16 14.0° 58.9mm 0.23m 230 - 1200 30.0 25.4 33 M25.5 x 0.5 #57-542 £1,270.75
78 1" f/3.8 - f/16 4.4° 36.1mm 0.44m 230 - 1200 62.5 109.3 446 M49.0 x 0.75 #57-543 £3,140.75
Hypercentric Lenses
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