PRIME CIRCLE XT Cine-Mod for ZEISS ZF.2 Lenses (including lens)

Still photography ZF.2 lenses mets professional cine-style features.
Ultra Lightweight design, engineering and precision grade manufacturing.
Teflon Impregnating Hard Anodizing (TIHA) for heavy duty, scratch resistance and lifetime work.
Ergo-Gear, innovative follow-focus gear featuring also handheld ergonomics grip.
Aperture gear de-clicked and dampened for smooth aperture action.
Front Mount with 95mm size mount for professional cinematographers matte-boxes and accessories
Filter thread 90mm for PRIME CIRCLE 90 Series professional step -down filter rings.
Canon EF-Mount with stainless-still heavy duty professional bayonet.
Exclusive SIDE INDEX VIEW for easy to read focus/aperture settings!
Innovative X-Circle Cine-Lock bayonet with improved locking mount for cine-style focus work.
Front Mount with circular engraved grooves for superior flare and reflection control.
Full coverage Full-Frame 24x36 mm
Side Code Barrel with engraved lens size - immediate lens coding for production crew reports
PRIME CIRCLE XT is designed by a cinematographer on the field to improve shooting quality!
Dedicated matte-box with sliding compensating base (MAT-BOX)
Custom Flight - Cases in flight hand luggage size!


PrimeCircle XT 21mm/f2,8 is a cine-mod of ZEISS Distagon T* 2,8/21 world class optics.

Virtually distortion-free optics

Dramatic perspectives and a view from extraordinary image angles – ZEISS lenses open up
new composition possibilities. Distortion would disrupt the composition because straight lines,
whose image does not go through the image center, would be reproduced with a curved shape.
This annoying effect is accordingly and largely compensated through elaborate optical designs at all focal lengths.

Elaborate stray light reduction

Rich, vibrant colors are vital to creating a lasting impression. Stray light in the lens, however, would lead to
a brightening of the image, which is particularly visible in shadow areas. Image contrast is lowered;
the image appears dull and bleached. We combine various, elaborate techniques to reduce unwanted stray light.
For example, all lens elements are coated with the famous ZEISS T*® anti-reflective coating.
Additionally, a jet black special paint is applied by hand to all lens element edges to ensure
that reflections are prevented from the start.

Floating Elements Design

Today’s camera technologies and high-resolution sensors demand continuous improvement of lens performance.
Thanks to the use of the latest floating element design principles, optical aberration effects in ZEISS lenses
are reduced to a minimum throughout their entire focusing range.
This is achieved by variation of the axial distance between individual lens elements or groups.
This adjustment of the lens-to-lens distance is coupled to the distance setting
to ensure correct compensation at all times. The mechanical construction of these lenses is extremely complex
and they must be assembled with utmost precision – both of which are key competencies of ZEISS.

Excellent image quality

The ZEISS range of T*® lenses offers the highest possible standards in terms of performance, reliability and,
of course, image quality. Quite simply, they are superior in every way. You can count on highly advanced flare control
for crisp and brilliant images, for example. And virtually zero geometric distortion, ensuring precise accuracy when
reproducing shapes – especially useful when photographing products and architecture.

Precise manual focus

Manually focusing a lens means controlling the image result from your fingertips. A good ergonomic design makes
all the difference. ZEISS lenses stand out with their large rotation angle which enables precise focusing.
Changes are immediately visible in the viewfinder. The high-quality focusing mechanism moves smoothly without play,
thus also supporting the intuitive interaction with the focal plane. The precise engraving in meter and feet, and the depth
of focus scale provide additional support for manually focusing.