onsemi AR0521 · 5.0MP 1/2.5" rolling-shutter CMOS image sensor
AR0521 Sensor Specifications & Compatible M12 and C-Mount Lenses
The AR0521 from onsemi is a 1/2.5-inch rolling-shutter CMOS image sensor for industrial and embedded imaging. It produces 2592x1944 (5.0 MP) at 48 fps using 2.2um pixels across a 7.13mm diagonal, with HiSPi, MIPI CSI-2, or parallel output in color or mono. Pick an M12 Lens for the 7.13 mm image circle from the table below, built on measured lens data rather than focal-length-only estimates.
AR0521 specifications
| Part number | AR0521 |
|---|---|
| Manufacturer | onsemi |
| Family | AR0521 |
| Resolution | 2592x1944 (5.0 MP) |
| Optical format | 1/2.5" |
| Active area | 5.7 × 4.28 mm |
| Sensor diagonal | 7.13 mm |
| Pixel size | 2.2 µm |
| Shutter | Rolling |
| Max frame rate | 48 fps |
| Interface | HiSPi / MIPI CSI-2 / Parallel |
| Color / mono | Color / Mono |
Manufacturer datasheet: onsemi AR0521 product page
Lens selection for the AR0521 with calculated field of view
Each field of view below is calculated for the AR0521 active area (5.7 × 4.28 mm) from Commonlands’ per-lens field-of-view data, which reflects each lens’s real distortion rather than a focal-length-only estimate. Alongside the horizontal, vertical, and diagonal field of view, each row lists focal length, mount, aperture (F#), and coverage. Follow the product links for distortion, ingress protection, dimensions, and resolution specifications. Coverage compares the lens image circle with the 7.13 mm sensor diagonal. Entries marked Circular image do not cover the full diagonal; part of the sensor lies outside the image circle. Run working-distance and object-size numbers through the field of view calculator.
Engineering picks for the AR0521
- 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 AR0521: 31° H × 23° V (38° diagonal). The image circle covers the full sensor (verified 2026-07-02).
- Best ~60° HFoV: Low Distortion 5.2mm M12 Lens (CIL052) (5.2 mm, f/3.4). Why: the closest covering option to 60° horizontal, chosen for general-purpose machine-vision framing. Field of view on the AR0521: 58° H × 45° V (69° diagonal). The image circle covers the full sensor (verified 2026-07-02).
- Best ~120° HFoV: Low Distortion 1.8mm M12 Lens (CIL018) (1.8 mm, f/2.8). Why: the closest covering option to 120° horizontal, chosen for wide navigation and room-scale coverage. Field of view on the AR0521: 120° H × 103° V (133° diagonal). The 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 AR0521: 66° H × 52° V (78° diagonal). The 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 AR0521: 39° H × 30° V (48° diagonal). The image circle covers the full sensor (verified 2026-07-02).
Every covering option below comes from the M12 Lens collection or the C-Mount Lens collection, from 1.5 mm to 100 mm focal length, spanning 3° to 190° horizontal field of view on the AR0521.
Covers in the table means the lens image circle is at least as large as the 7.13 mm sensor diagonal. Confirm corner illumination and MTF at your aperture, wavelength, and working distance. A complete circular fisheye image fits inside the sensor only when its diameter is no larger than the sensor's short side. Need a focal length or coverage that is not listed here? Ask our engineers to confirm a match.
How to choose a lens for the AR0521
Start from the field of view and working distance your application needs. Confirm that the lens image circle covers the active sensor diagonal and that the mount provides the required focus travel and rear clearance. A lens megapixel rating alone does not establish resolution on this sensor. Compare measured MTF at the spatial frequencies your task needs, at the intended aperture, wavelength, distance, and field position, accounting for the 2.2 µm pixel pitch. Estimate framing with the Commonlands field of view calculator.
Sourcing a camera module around the AR0521? Commonlands manufactures M12 lenses and C-mount lenses and ships from San Diego, with same-day shipping on in-stock lenses ordered before 12 PM PST. We also design and build custom MIPI CSI-2 camera modules that integrate the lens, the AR0521 sensor, and the carrier board, available from 1,000 units per year, and assemble consigned AR0521 boards with Commonlands lenses in our San Diego ISO 6 cleanroom from 100 to 100,000 units per year. Talk to an applications engineer.
Related guides and tools
AR0521 lens and camera module FAQ
What lens fits the AR0521 sensor?
A lens match requires sufficient image-circle coverage, suitable MTF, and mechanical clearance. Use the coverage column and calculated field of view to shortlist lenses, then verify the operating conditions on each product page.
What is the AR0521 sensor size?
The AR0521 is a 1/2.5" format sensor with a 5.7 × 4.28 mm active area and a 7.13 mm diagonal, built on 2.2 µm pixels at 2592x1944 resolution.
Does Commonlands build a custom MIPI camera module for the AR0521?
Yes. Commonlands designs and builds custom MIPI CSI-2 camera modules that integrate the lens, the AR0521 sensor, and the carrier board, available from 1,000 units per year with active lens-to-sensor alignment and 100% MTF testing. Consigned assembly of your AR0521 boards with Commonlands lenses runs from 100 to 100,000 units per year in our San Diego ISO 6 cleanroom. Talk to an applications engineer to scope a module.
Match a lens to your AR0521 camera
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