Dulens APO Cambrian Prime 77mm

Dulens APO Cambrian Prime Lenses – A New Standard for Medium & Large Format Cinematography

The Dulens APO Cambrian Primes are designed from the ground up for today’s large sensor cinema cameras. While cinematographers once relied on rehoused stills glass such as Mamiya Sekor, Dulens delivers a purpose-built cine lens series: modern, compact, and optically uncompromising.

Covering sensors such as the Blackmagic URSA Cine 17K, the Fujifilm Eterna 55, and even the legendary ARRI Alexa 65, the Cambrian Primes unlock the full aesthetic potential of medium and large format cinematography.

Key Features at a Glance

• Apochromatic design – virtually no chromatic aberration.

• No aspherical elements – smooth, onion-ring free bokeh and natural rendering.

• T2.0 aperture (≈ f/1.8) – exceptionally fast for medium format, fully usable wide open.

• Minimal vignetting on large format – even at T2.0, corners remain clean and sharp.

• Gentle coatings – low microcontrast with cinematic highlight roll-off.

• High MTF across the frame – edge-to-edge resolution without harshness.

• Cine-ready build – 270° focus throw, consistent gear positions, 80mm fronts.

• Compact & lightweight – around 700–850g per lens: remarkably small for medium format coverage.

• Matched set – consistent color, weight, and ergonomics across the entire range.

Dulens Cambrian primes edge mtf

What Makes Cambrian Primes Unique

Unlike most modern cine lenses, the Cambrians avoid aspherical elements entirely. This prevents onion-skinning and harsh artifacts in bokeh, preserving a natural, cinematic defocus.

They are also apochromatically corrected, eliminating chromatic aberration and delivering exceptionally clean color separation. Combined with gentle coatings, the lenses produce lower microcontrast and smooth highlight roll-off — technically pure yet never clinical.

And while their rendering feels soft and organic, the Cambrians achieve a very high MTF index from corner to corner: detail, sharpness, and resolution across the entire frame.

Superior to APO Mini Primes

Compared to Dulens’ own APO Mini Primes, the Cambrians offer:

• Larger image circle for true medium and large format coverage.

• Less vignetting and fewer artifacts wide open.

• Higher resolving power and cleaner color rendition.

• Greater consistency across the set in mechanics and ergonomics.

Complete Six-Lens Set

All six focal lengths share identical mechanics for maximum efficiency:

• Focal lengths: 24mm, 32mm, 40mm, 55mm, 77mm, 105mm

• Aperture: T2.0 – T16

• Focus rotation: 270°

• Front diameter: 80mm

• Filter thread: 72mm

• Iris blades: 11

• Housing: consistent gear positions for focus & iris

Close Focus & Weight

Each lens is designed to be ultra-compact and lightweight, between 750g and 850g, making the Cambrians among the smallest true medium-format cine primes available.

• 24mm: close focus 0.19m (object) / 0.35m (image) – weight ~850g

• 32mm: close focus 0.20m / 0.35m – weight ~800g

• 40mm: close focus 0.27m / 0.42m – weight ~780g

• 55mm: close focus 0.36m / 0.51m – weight ~750g

• 77mm: close focus 0.53m / 0.68m – weight ~790g

• 105mm: close focus 0.70m / 0.85m – weight ~810g

Optical Design

• 24mm: 14 elements in 10 groups

• 32mm: 14 elements in 12 groups

• 40mm: 13 elements in 10 groups

• 55mm: 11 elements in 10 groups

• 77mm: 11 elements in 8 groups

• 105mm: 10 elements in 7 groups

Designed for the New Generation of Cameras

The Cambrian Primes are not just full-frame capable; they are purpose-built for large-format workflows:

• Blackmagic URSA Cine 17K – coverage and sharpness across the oversized sensor.

• Fujifilm Eterna 55 – a true medium format cine camera, fully matched by Cambrian’s image circle.

• ARRI Alexa 65 – clean coverage even on the industry’s large-format reference.

Even wide open at T2.0, the Cambrians show almost no vignetting or edge artifacts, making them uniquely reliable for high-resolution large-format capture.

The Cambrian Look

• Natural skin tones with minimal grading effort.

• Smooth, artifact-free bokeh thanks to the absence of aspherics.

• Subtle flare characteristics that feel cinematic, not clinical.

• Gentle contrast with extremely high resolving power — a rare balance in modern glass.

Conclusion

The Dulens APO Cambrian Primes are:

• purpose-built for medium and large format,

• exceptionally small and lightweight,

• free of chromatic aberration and aspheric artifacts,

• and mechanically consistent across a six-lens set.

For cinematographers seeking a modern alternative to rehoused vintage glass — with optical purity, compact form, and true large-format coverage — the Cambrians are the clear choice.

Specifications – Dulens APO Cambrian Prime Lenses

Available Focal Lengths:

• 24mm, 32mm, 40mm, 55mm, 77mm, 105mm

Aperture:

• T2.0 – T16

Focus Rotation:

• 270°

Iris Blades:

• 11

Front Diameter:

• 80mm

Filter Thread:

• 72mm

Housing:

• Cine-ready build, unified focus & iris gear positions

Optical Design:

• 24mm – 14 elements in 10 groups

• 32mm – 14 elements in 12 groups

• 40mm – 13 elements in 10 groups

• 55mm – 11 elements in 10 groups

• 77mm – 11 elements in 8 groups

• 105mm – 10 elements in 7 groups

Close Focus (Object / Image Plane):

• 24mm – 0.19m / 0.35m

• 32mm – 0.20m / 0.35m

• 40mm – 0.27m / 0.42m

• 55mm – 0.36m / 0.51m

• 77mm – 0.53m / 0.68m

• 105mm – 0.70m / 0.85m

Weight (Approx.):

• 24mm – 850g

• 32mm – 800g

• 40mm – 780g

• 55mm – 750g

• 77mm – 790g

• 105mm – 810g

Footage will soon be released by Gafpa Gear, we will shoot some photos in the open gate of the Fujifilm GFX 100 2 and some video, soon availabe!

A lens test will soon be available exclusively made by Gafpa Gear, stay tuned!