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Short Back Focus |
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Features
- Corrected and coated for
900-1700 nm
- 25, 35, 50, 75, 100 mm focal
lengths
- f/1.4 maximum aperture
(Canon types)
- Reflection <1% per surface
- Front thread for use with
filters
- Canon FD (short) or C-mount
- No toxic glasses
- Manual focus and iris
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Specifications All
Types
- MTF – 40% (min) at 15 lp/mm
- Image Diameter – 18 mm
- Chromatic Aberration - <10
µm
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Options
- Motorized focus and iris
- Coated for 1700-2500 nm
- Special mounts
- Narrowband and ND filters
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Learn more about NIR imaging.
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Type Number
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9820
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9829
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9830
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9831
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9821
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Focal Length
(mm)
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25
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35
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50
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75
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100
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Maximum
Aperture*
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1.4/1.4
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1.4/1.5
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1.4/1.5
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1.4/1.8
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1.4/2.0
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Diagonal FOV
(deg)
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40
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29
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20
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14
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10
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Minimum
Focus (m)
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0.3
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0.7
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1.5
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2.5
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3.0
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Transmission
(%)
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>85
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>85
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>83
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>82
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>80
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Distortion
(%)
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<2.5
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<2.0
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<1.5
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<1.5
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<0.5
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Vignetting
(%)
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<25
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<25
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<25
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<22
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<15
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Size (dia/length
mm)
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87/90
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87/86
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100/94
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128/121
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120/145
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Weight (kg)
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0.6
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0.7
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1.0
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1.4
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1.2
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* Shown as Canon/C-mount
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Visit the Optec
website |
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[ Home ] [ Up ] [ 75-500 mm ] [ Short Back Focus ] [ f/2 Standard Canon Mount ] [ Special Situations Lenses ] [ Near Infrared Technology ]
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