Cambo ACTAR-20 20mm f/4 Lens without Lens Plate
The Cambo ACTAR-20 is a 20mm f/4 lens designed for Lens Board (Technical Camera) mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.
Cambo ACTAR-20 20mm f/4 Lens without Lens Plate
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Lens Overview — Cambo ACTAR-20
Key Features — Cambo ACTAR-20
20mm Large-Format Prime: Fixed 20mm focal length designed specifically for large-format technical camera systems, providing an expansive ultra wide-angle field of view.
Large Image Circle: Covers the large-format frame, giving photographers the full image circle needed for movements such as shift and tilt on technical cameras.
f/4 Maximum Aperture: Wide maximum aperture of f/4 supports adequate light transmission across the large-format image circle at this focal length.
Lens Board Mount: Mounts via a technical camera lens board interface, making it compatible with Cambo and similar large-format technical camera systems.
Manual Focus Design: Fully manual focus operation suits the deliberate, tripod-based workflows typical of architectural, landscape, and fine art technical camera photography.
82mm Filter Thread: Front filter thread accepts standard 82mm filters, including polarizers and ND filters commonly used in controlled shooting environments.
Lens Specifications — Cambo ACTAR-20
| Spec | Detail |
|---|---|
| Use Cases | Studio |
| Lens Type | Prime |
| Format | Large Format |
| Zoom/Prime | Prime |
| Focal Length | 20mm |
| Maximum Aperture | f/4 |
| Camera System | DSLR |
| Lens Mount | Lens Board (Technical Camera) |
| Autofocus | No |
| Focus Type | Manual |
| Image Stabilization | None |
| Filter Thread | 82mm |
Description — Cambo ACTAR-20
The Cambo ACTAR-20 is a 20mm ultra wide-angle prime lens designed for large-format technical camera systems. It mounts via a Lens Board (Technical Camera) interface and is classified under the large-format lens category, making it purpose-built for technical camera workflows that demand wide coverage and image precision. The lens operates at a maximum aperture of f/4 and relies entirely on manual focus, supporting the measured, tripod-based approach that large-format photography demands.
With an 82mm filter thread, photographers can easily attach polarizers, graduated ND filters, or other accessories to manage exposure and light. Weighing 1200g, the ACTAR-20 is a solid, well-constructed optic appropriate for its format. No image stabilization is provided, which is expected for a lens of this type intended for use on a stable support. This listing does not include a lens plate, so buyers should confirm compatibility with their specific Cambo technical camera setup before purchase.
Pros — Cambo ACTAR-20
- ✓20mm focal length provides a notably wide field of view for large-format coverage
- ✓Large-format lens format ensures expansive image circle for technical camera use
- ✓82mm filter thread accommodates a wide range of standard photographic filters
Cons — Cambo ACTAR-20
- ✗No image stabilization (imageStabilization: None), requiring stable support for sharp results
- ✗Manual focus only (autoFocus: false), which may slow shooting for some workflows
- ✗Maximum aperture of f/4 offers limited light-gathering capability compared to faster primes
Frequently Asked Questions — Cambo ACTAR-20
What mount does the Cambo ACTAR-20 use?+
The ACTAR-20 uses a Lens Board (Technical Camera) mount. This means it is designed for use with technical camera systems that accept lens board-mounted optics, not standard DSLR or mirrorless bayonet mounts.
Does this lens support autofocus?+
No. The ACTAR-20 is a manual focus lens (autoFocus: false, focusType: Manual). All focusing must be performed manually, which is standard practice for large-format technical camera photography.
What filter size does the ACTAR-20 accept?+
The lens has an 82mm filter thread, so it accepts any standard 82mm screw-in filters including polarizers, ND filters, and UV filters.
How heavy is the Cambo ACTAR-20?+
The lens weighs 1200g. Given this weight and its large-format design, it is best used on a sturdy tripod or camera support system.
Is image stabilization included?+
No, the ACTAR-20 does not include image stabilization (imageStabilization: None). For sharp results, a solid tripod and careful technique are recommended.
Is this lens sold with a lens plate included?+
No. As indicated in the product title, this version of the ACTAR-20 is sold without a lens plate. Buyers will need to source a compatible lens plate separately for their technical camera system.