OmniVision image sensor · PureCel
OS05A20 sensor specifications and
compatible M12 lenses & C-mount lenses
OS05A20 is an OmniVision 1/2.7-inch rolling-shutter CMOS image sensor from the PureCel family, suited to security and surveillance cameras needing detail in dim scenes. It resolves 2688x1944 (5.2MP) on 2um pixels with NIR sensitivity at 60 fps over MIPI CSI-2 or LVDS. Commonlands matches M12 Lenses and C-Mount Lenses to its 6.63mm image circle and reports the calculated horizontal, vertical, and diagonal field of view.
OS05A20 specifications
| Part number | OS05A20 |
|---|---|
| Manufacturer | OmniVision |
| Family | PureCel |
| Resolution | 2688x1944 (5.2 MP) |
| Optical format | 1/2.7" |
| Active area | 5.38 × 3.89 mm |
| Sensor diagonal | 6.63 mm |
| Pixel size | 2.0 µm |
| Shutter | Rolling |
| Max frame rate | 60 fps |
| Interface | MIPI CSI-2 / LVDS |
| Color / mono | Color |
| NIR response | Enhanced near-infrared |
Manufacturer datasheet: OmniVision OS05A20 product page
Compatible Commonlands lenses for the OS05A20. Field of View calculated with Distortion.
Each field of view below is calculated for the OS05A20 active area (5.38 × 3.89 mm) using our MCP server and Field of view calculator. The rectilinear formula FoV = 2 × arctan(dimension ÷ (2 × focal length)) is incorrect for many lenses as it doesn't include distortion. Coverage shows whether the lens image circle covers the 6.63 mm sensor diagonal. Fisheye and f-theta lenses do not follow the rectilinear formula, so their entries link to the product page for the mapped field of view.
Engineering picks for the OS05A20
- Best ~30° HFoV: Telephoto 10.4mm M12 Lens (CIL104) (10.4 mm, f/3.8). Why: the closest covering option to 30° horizontal, chosen for tight inspection framing and long read ranges. Field of view on the OS05A20: 29° H × 21° V (36° diagonal); image circle covers the full sensor; verified 2026-07-02.
- Best ~60° HFoV: Wide-Angle 5.3mm M12 Lens (CIL353) (5.3 mm, f/2). Why: the closest covering option to 60° horizontal, chosen for general-purpose machine-vision framing. Field of view on the OS05A20: 60° H × 43° V (76° diagonal); image circle covers the full sensor; verified 2026-07-02.
- Best ~120° HFoV: Fisheye 2.7mm M12 Lens (CIL227) (2.7 mm, f/2.5). Why: the closest covering option to 120° horizontal, chosen for wide navigation and room-scale coverage. Field of view on the OS05A20: 119° H × 84° V (151° diagonal); image circle covers the full sensor; verified 2026-07-02.
- Lowest distortion: Low Distortion 4.4mm M12 Lens (CIL043) (4.4 mm, f/3.2). Why: measured -0.5% TV distortion, the flattest image among covering lenses. Field of view on the OS05A20: 63° H × 48° V (74° diagonal); image circle covers the full sensor; verified 2026-07-02.
- Best low light: 8mm C-Mount Lens (CIL521) (8 mm, f/1.5). Why: the fastest covering aperture (f/1.5), which collects the most light per pixel. Field of view on the OS05A20: 37° H × 27° V (45° diagonal); image circle covers the full sensor; verified 2026-07-02.
Commonlands offers 65 lens options for the OS05A20: M12 Lenses and C-Mount Lenses from 0.8 mm to 100 mm focal length, spanning 3° to 195° horizontal field of view on the OS05A20 active area.
Coverage key: covers = lens image circle ≥ sensor diagonal; crops = image circle smaller than the diagonal (expect vignetting at the corners); verify = image circle not published for this lens — ask our engineers to confirm coverage.
How to choose a lens for the OS05A20
Start from the field of view your application needs, then read across to the focal length that produces it on the OS05A20. Confirm the lens image circle covers the 6.63 mm diagonal so the corners are not cropped, and check the lens resolution is rated for 5.2 MP or higher so it resolves the 2.0 µm pixels. For exact working-distance and object-size numbers, run the figures through the Commonlands field of view calculator.
Sourcing a MIPI camera module around the OS05A20? Commonlands can provide customized MIPI modules with our lenses; MoQs apply. Commonlands provides M12 lenses and C-mount optics and ships from San Diego, with same-day shipping for in-stock lenses ordered by 12 PM PST. We also assemble and align lens-to-sensor modules. Talk to an applications engineer.
Related guides and tools
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