Arducam 4-12mm Varifocal C-Mount Lens for Raspberry Pi HQ Camera

In this review of the Arducam 4-12mm varifocal C-mount lens, the bottom line is simple: it is a compact, adjustable telephoto option for makers and developers who want precise framing with the Raspberry Pi High Quality Camera. The reviewer found the included C-CS adapter and the manual focus and aperture rings to be the most valuable features because they let users quickly adapt the camera to different scenes without swapping optics. For hobbyists, surveillance prototypers, and industrial projects needing a small, versatile lens, this lens delivers predictable, usable results.

Key Features

• C-CS adapter included: The supplied adapter lets the Raspberry Pi High Quality Camera accept the lens immediately, removing the need for separate mounts.
• Varifocal 4-12mm: The adjustable focal length gives a wide-to-telephoto range so users can fine tune framing without changing lenses.
• Manual focus ring: The focus ring provides tactile control to achieve sharp images at different working distances for both close and distant subjects.
• Aperture ring F1 to F16: The aperture ring enables exposure and depth-of-field control for improved image quality in varied lighting.
• Compact, lightweight design: At around 67.5g and small dimensions, the lens is easy to mount on rigs or small enclosures where space is limited.

Who It's For

The lens is aimed at Raspberry Pi enthusiasts, machine vision hobbyists, and small-scale surveillance or robotics projects that need a reliable, adjustable lens with a C-mount interface. Its manual controls make it well suited for experimenters who prefer hands-on optical adjustment instead of auto focus.

Those who need built-in IR filtering, autofocus, or ultrawide prime optics should look elsewhere; this lens is a manual, compact varifocal with no IR filter included and is best when paired with a High Quality Camera module and optional mounting accessories.

Pros & Cons

Pros

• Versatile 4-12mm focal range covers wide to telephoto framing without swapping lenses.
• Included C-CS adapter simplifies mounting to the Raspberry Pi High Quality Camera.
• Manual aperture and focus rings give precise control over depth of field and sharpness.
• Small size and 67.5g weight make it easy to integrate into compact builds.

Cons

• No IR filter is included, so users needing infrared cut should add one separately.
• Manual controls mean it is not ideal for users who require autofocus or remote aperture control.

Specifications

Mount	C-mount (C-CS adapter included)
Focal length	4-12mm varifocal
Field of view (H)	87.2-39 (on unspecified format), 80-32 on 1/2.3 IMX477
Aperture	F1 to F16
Optical format	1/2 lens optical format
Dimensions	33 x 43mm (approx)
Weight	67.5g

Our Verdict

The Arducam 4-12mm varifocal C-mount lens is a practical, value-oriented choice for Raspberry Pi High Quality Camera users who need manual control and a compact telephoto range. It is particularly good for prototyping, surveillance, and robotics where size and adjustability matter, though photographers who need autofocus or IR filtering will need additional accessories.

Frequently Asked Questions

Does this lens fit the Raspberry Pi High Quality Camera?
The lens fits via the included C-CS adapter so it can be mounted directly to the High Quality Camera module.

Is an IR filter included?
No, this lens does not come with an IR filter; add an IR cut filter separately if required.

Can the focal length and aperture be adjusted?
Yes, the lens has a 4-12mm varifocal range plus manual focus and an aperture ring from F1 to F16 for fine control.