OPT
OPT-COB1228B C-Mount lens
Manufacturer part number: OPT-COB1228B
Series: Cobra-Festbrennweiten
- Focal length
- 12 mm
- Max. Sensorformat
- 2/3" (2.2 µm)
- Mount
- C-Mount
- Mindestobjektdistanz (MOD)
- 80 mm
- Aperture
- F2.8 - F16
- Filtergewinde
- M27 × 0.5
- Resolution
- 12 MP (berechnet)
- Fokusbereich (ab Objektivvorderseite)
- 80 mm up to ∞
- Fokuseinstellung
- Manual
Price and availability on request
Request this item directly by email
Not sure which model fits?
One of our staff will review your application and recommend the right configuration.
Have your application reviewedTechnical data
| Manufacturer part number | OPT-COB1228B |
|---|---|
| Focal Length(mm) | 12 mm |
| Adjustion Type | manuell |
| Aperture(F/#) | F2.8 – F16 |
| Image Circle Ø(mm) | Ø11 mm (2/3") |
| Working Distance(mm) | 80 mm – ∞ |
| Magnification（X） | 0.112 × at WD 80 |
| Image Resolution(µm) | 2.2 µm |
| TV Distortion(%) | <0.1 % at WD 300 |
| Back Focal Length(mm) | 13.03 mm |
| Effective Diameter Front(mm) | 23.2 mm |
| Effective Diameter Back(mm) | 12.5 mm |
| Chief Ray Angle | <5° |
| Mount | C-Mount |
| Weight(kg) | 0.09 kg |
| Size(mm) | Ø29 × 47.61 |
| 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) | 80 mm |
| Spektralbereich | Nicht angegeben |
| Verzeichnung (max.) | < 0.1 % |
| Blendensteuerung | Nicht angegeben |
| Vibrationsfest | No |
| Baulänge | 47.61 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-COB1228B (PDF)
Datasheet · EN · 167 KB
- Download datasheet
Optische Daten (MTF) OPT-COB1228B
Datasheet · EN · 645 KB
- Download datasheet
Cobra-Festbrennweiten - Serienbroschüre OPT
Datasheet · EN · 5328 KB
- Download
3D-Modell OPT-COB1228B (STEP)
Technical drawing · EN · 4757 KB
Description
The OPT-COB1228B is listed in OPT's series “Cobra Fixed Focal Length Lenses” with focal length 12 mm, aperture F2.8 - F16, image circle Ø11 mm (2/3"). Also: working distance 80 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.