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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​

No hard maximum inspection distance

There is no absolute maximum inspection distance for Overview cameras. The effective working distance depends on your lens choice, the size of the feature you need to detect, and what percentage of the camera's field of view that feature occupies. As distance increases, each pixel covers a larger area, so smaller defects become harder to detect. The distances below are practical guidelines based on typical applications, not hard limits.

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.