Dulens AMP21B-EF APO Mini Prime 21 T2.6 EF Mnt Color: Black

Dulens AMP21B-EF APO Mini Prime 21 T2.6 EF Mount, Black | Vintage character, precise cine control

A vintage-leaning image with lively flares and reduced chromatic aberration is the distinctive balance of the Dulens AMP21B-EF APO Mini Prime 21 T2.6 EF Mount. It’s a cinema prime for cinematographers who want the character of a classic lens, but with an apochromatic design intended to control colour fringing. Dulens pairs that optical approach with its V coating, which creates multicoloured flare patterns while retaining the lens’s transmission and colour accuracy. The result has a softer-contrast look than a clean, modern rendering, without relying on the pronounced chromatic aberration associated with less-corrected vintage optics. Its compact cinema housing, fixed front and smooth, backlash-free focus movement make it well suited to small crews and carefully controlled production work. The short barrel is useful when the camera package needs to stay compact, including on a gimbal or drone; the fixed front also avoids barrel extension or rotation during focusing. For wider establishing shots, interiors and moving-camera sequences, this prime brings a broad view and a consistent cinematic character. It’s a particularly interesting option for productions that want visible flare as part of the image, rather than treating every light source as something to suppress.

Why this focal length works

• 46 mm image circle: The generous coverage is stated to suit large-format cameras, including RED Monstro and ARRI LF systems, giving productions room to work with larger sensors.
• 11 iris blades: A high blade count helps keep out-of-focus highlights rounded as the aperture is stopped down, including at T5.6 or T8.
• 80 mm front diameter: This compact front end is a useful fit for smaller cinema builds where bulky lens dimensions can complicate the camera package.
• 72 mm filter size: The standard filter diameter gives you a direct way to add filtration at the lens, without relying on a larger matte-box setup.
• 68 mm length: The short barrel keeps the lens profile compact, a welcome detail when balancing a camera for gimbal or drone work.
• Fixed, non-rotating front: The front stays put as you focus, so filter positioning remains consistent during a take.
• V coating: Dulens’ coating produces colourful flare character rather than the more monochromatic flares common to many modern coatings.

On your camera

This version has an EF mount. Dulens states that the series’ 46 mm image circle is compatible with large-format cameras, including RED Monstro and ARRI LF systems. Focus is handled through the lens’s long, smooth travel, with no backlash; that gives a focus puller a consistent mechanical movement to work with during a take. The front remains fixed rather than extending or rotating as focus changes.

What's Included

• Dulens Mini Prime cinema lens, EF mount

Technical Specifications

• Brand: Dulens
• Model: AMP21B-EF APO Mini Prime
• Type: Cinema prime lens
• Focal length: 21 mm
• Maximum T-stop: T2.6
• Mount: EF
• Image circle: 46 mm
• Iris blades: 11
• Front diameter: 80 mm
• Filter size: 72 mm
• Length: 68 mm
• Weight: 550 g