OPT
OPT-COB0828B C-Mount lens
Manufacturer part number: OPT-COB0828B
Series: Cobra-Festbrennweiten
- Focal length
- 8 mm
- Max. Sensorformat
- 2/3" (2.2 µm)
- Mount
- C-Mount
- Mindestobjektdistanz (MOD)
- 30 mm
- Aperture
- F2.8 - F16
- Filtergewinde
- M27 × 0.5
- Resolution
- 12 MP (berechnet)
- Fokusbereich (ab Objektivvorderseite)
- 30 mm up to ∞
- Fokuseinstellung
- Manual
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| Manufacturer part number | OPT-COB0828B |
|---|---|
| Focal Length(mm) | 8 mm |
| Adjustion Type | manuell |
| Aperture(F/#) | F2.8 – F16 |
| Image Circle Ø(mm) | Ø11 mm (2/3") |
| Working Distance(mm) | 30 mm – ∞ |
| Magnification（X） | 0.168 × at WD 30 |
| Image Resolution(µm) | 2.2 µm |
| TV Distortion(%) | <0.56 % at WD 300 |
| Back Focal Length(mm) | 13.06 mm |
| Effective Diameter Front(mm) | 22.6 mm |
| Effective Diameter Back(mm) | 13.1 mm |
| Chief Ray Angle | <5° |
| Mount | C-Mount |
| Weight(kg) | 0.08 kg |
| Size(mm) | Ø29 × 48.36 |
| Filter Thread | M27×0.5-6H |
| Working Temperature | -20 °C – +60 °C |
| Coaxial | no |
| Sensor Format | 2/3" |
| Flange Focal Distance(mm) | 17.526 mm |
| Max. Sensorformat | 2/3" |
| Auflösung | 12 MP (von uns berechnet) |
| Pixelgröße | 2.2 µm |
| Mindestobjektdistanz (MOD) | 30 mm |
| Spektralbereich | Nicht angegeben |
| Verzeichnung (max.) | < 0.56 % |
| Blendensteuerung | Nicht angegeben |
| Vibrationsfest | No |
| Baulänge | 48.36 mm |
| Durchmesser | Ø 29 mm |
| Lens type | Entocentric |
Data according to the manufacturer's documentation. The current manufacturer datasheet, quotation and order confirmation are authoritative. Errors and changes excepted.
Dimensional drawing
Documents
- Download datasheet
Datasheet mit Maßzeichnung OPT-COB0828B (PDF)
Datasheet · EN · 139 KB
- Download datasheet
Optische Daten (MTF) OPT-COB0828B
Datasheet · EN · 652 KB
- Download datasheet
Cobra-Festbrennweiten - Serienbroschüre OPT
Datasheet · EN · 5 MB
- Download
3D-Modell OPT-COB0828B (STEP)
Technical drawing · EN · 3 MB
Description
OPT-COB0828B is a fixed focal length lens from the series “Cobra Fixed Focal Length Lenses” by OPT: focal length 8 mm, aperture F2.8 - F16, image circle Ø11 mm (2/3"). Further key data: working distance 30 mm - ∞, C-Mount.
At Ø29 mm, the Cobra series is as slim as a compact camera and yet designed for pixels from 2.2 µm - up to 230 lp/mm across the full image field. The coating covers 400 to 1000 nm, TV distortion stays below 0.2 %, and a chief ray angle below 5° keeps the illumination uniform right into the corners. It fits wherever little space and high resolution come together: character inspection on plastic parts, chip and display inspection, particle control.
When choosing a lens, what counts is the interplay of sensor size, pixel size, field of view and working distance - the focal length alone says little. If you tell us your camera and inspection task, we check the combination and, if needed, suggest suitable lighting to go with it. The dimensional drawing and the STEP model are included.