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Lens + FOV Table

This page provides comprehensive lens specifications, field of view calculations, and compatibility information for the OV20i smart camera system with S-mount (M12) lenses.

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note

The OV20i uses S-mount (M12 x 0.5) lenses with the Sony IMX296 sensor (1/2.9" format, 1440×1080 pixels, 3.45μm pixel size). All FOV calculations are based on the 4:3 aspect ratio.

Camera System Specifications​

Sensor Characteristics​

ParameterSpecification
Sensor ModelSony IMX296
Resolution1440 × 1080 pixels (1.6 MP)
Sensor Size1/2.9" (4.97 × 3.73 mm)
Pixel Size3.45 × 3.45 μm
Aspect Ratio4:3
Diagonal6.2 mm
Shutter TypeGlobal shutter

Lens Mount Specifications​

ParameterSpecification
Mount TypeS-mount (M12)
ThreadM12 × 0.5 mm
Focus MethodManual (rotation)
Back Focal LengthVariable (no fixed flange distance)
Filter ThreadNone (integrated optics)

Available Lens Options & FOV Table​

Standard Lens Range (6mm - 16mm)​

Focal LengthHorizontal FOV @ 100mmHorizontal FOV @ 1mHorizontal FOV @ 2mVertical FOV @ 1mDiagonal FOV @ 1mNotes
6mm45.6 mm456 mm912 mm342 mm570 mmUltra-wide angle
8mm34.2 mm342 mm684 mm257 mm428 mmWide angle
12mm22.8 mm228 mm456 mm171 mm285 mmStandard (factory)
16mm17.1 mm171 mm342 mm128 mm214 mmNarrow angle

Extended Range Lens (25mm)​

Focal LengthHorizontal FOV @ 100mmHorizontal FOV @ 1mHorizontal FOV @ 2mVertical FOV @ 1mDiagonal FOV @ 1mNotes
25mm11.0 mm110 mm220 mm82 mm138 mmTelephoto - requires spacer kit
note

The 25mm lens requires an additional 15mm faceplate spacer and M3×22 screws. Contact Overview support before purchase.

Field of View Calculation Formulas​

Basic FOV Formula​

Horizontal FOV = 2 × arctan(sensor_width / (2 × focal_length)) × distance

Where:

  • Sensor width = 4.97 mm (horizontal)
  • Sensor height = 3.73 mm (vertical)
  • Distance = working distance from lens to object

Practical Calculations​

FormulaApplication
FOV_width = (4.97 × distance) / focal_lengthQuick horizontal FOV estimate
FOV_height = FOV_width × 0.75Vertical FOV from horizontal
Diagonal_FOV = FOV_width × 1.25Diagonal FOV approximation
Angular_FOV = 2 × arctan(4.97 / (2 × focal_length))Horizontal angle in radians

Lens Selection Guide​

By Application Type​

ApplicationRecommended Focal LengthTypical Working DistanceFOV CoverageUse Cases
Wide Area Inspection6mm - 8mm200-500mmLarge parts/assembliesPCB inspection, packaging
General Purpose12mm (standard)300-800mmMedium partsComponent inspection, alignment
Precision/Detail16mm400-1200mmSmall featuresDefect detection, measurements
Microscopic/Fine Detail25mm500-2000mmVery small featuresSurface inspection, text reading

By FOV Requirements​

Required Horizontal FOVWorking DistanceRecommended LensTrade-offs
>400mm1m6mmHigher distortion, wide coverage
200-400mm1m8mmGood balance, moderate distortion
150-250mm1m12mmStandard choice, minimal distortion
100-180mm1m16mmSharp details, narrow coverage
<120mm1m25mmMaximum detail, requires kit

Lens Performance Characteristics​

Optical Quality by Focal Length​

Focal LengthDistortion LevelResolutionLight GatheringDepth of FieldBest For
6mmHigh barrelGoodExcellent (f/2.0)DeepWide surveillance
8mmModerateGoodVery good (f/2.0)DeepGeneral inspection
12mmLowVery goodGood (f/2.8)MediumPrecision work
16mmMinimalExcellentModerate (f/2.8)ShallowDetail inspection
25mmMinimalExcellentLimited (f/2.8)Very shallowMicroscopic work

Aperture Specifications​

Focal LengthMaximum ApertureMinimum ApertureDepth of Field @ f/2.8Low Light Performance
6mmf/2.0f/1650mm - ∞Excellent
8mmf/2.0f/1630mm - ∞Very good
12mmf/2.8f/1615mm - 200mmGood
16mmf/2.8f/1610mm - 100mmModerate
25mmf/2.8f/165mm - 50mmLimited

Installation Requirements​

Standard Lenses (6mm - 16mm)​

RequirementSpecification
Tools RequiredPhillips head screwdriver
Installation Time5-10 minutes
CalibrationManual focus adjustment
Additional PartsNone

25mm Telephoto Lens​

ComponentPart NumberDescription
M12 25mm LensContact OverviewTelephoto lens
15mm Faceplate SpacerIncluded with kitFront extension
Spacer RingsVarious thicknessesFocus adjustment
M3×22 Screws4 piecesMounting hardware

Working Distance Guidelines​

Minimum Focus Distances​

Focal LengthMinimum FocusOptimal RangeMaximum Useful Distance
6mm50mm100-300mm1000mm
8mm80mm150-500mm1500mm
12mm120mm200-800mm2000mm
16mm160mm300-1200mm3000mm
25mm250mm500-2000mm5000mm

FOV vs Distance Calculator​

For quick field of view estimates at any distance:

LensFOV FactorCalculation
6mm0.828FOV = Distance × 0.828
8mm0.621FOV = Distance × 0.621
12mm0.414FOV = Distance × 0.414
16mm0.311FOV = Distance × 0.311
25mm0.199FOV = Distance × 0.199

Lens Procurement Information​

Focal LengthPrimary SupplierAlternative SourceTypical Lead Time
6mmEdmund OpticsAmazon/Various1-2 weeks
8mmEdmund OpticsAmazon/Various1-2 weeks
12mmFactory installedOverview supportN/A
16mmEdmund OpticsAmazon/Various1-2 weeks
25mmOverview supportEdmund Optics2-4 weeks

Quality Grades​

GradeDescriptionPrice RangeApplications
IndustrialHigh precision, low distortion$$$Production inspection
SecurityGood performance, cost effective$$General monitoring
ConsumerBasic performance$Prototyping only

Lens Selection Considerations​

Optical Limitations​

  • Barrel Distortion: Increases with shorter focal lengths (6mm-8mm)
  • Chromatic Aberration: More noticeable at lens edges, especially wide-angle
  • Vignetting: Potential darkening at image corners with mismatched sensor coverage
  • Focus Uniformity: Wide-angle lenses may have focus variation across field

Environmental Factors​

  • Temperature Stability: Industrial-grade lenses recommended for ±40°C operation
  • Vibration Resistance: Secure mounting critical for telephoto lenses (16mm+)
  • Dust Protection: No sealed system - consider environment when selecting

System Integration​

  • Calibration Requirements: Wider lenses need more distortion correction
  • Processing Load: Higher distortion = more computational overhead
  • Storage Requirements: Larger FOV = more data per inspection

🔗 See Also​

Lens specifications and availability subject to change. Contact Overview support for current compatibility and technical assistance.