LockCircle announces Prime Circle – A custom Zeiss ZF.2 ring kit

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Our friends over at LockCircle have just announced another product – the Prime-Circle! A series of custom lens kits for Zeiss ZF.2 lenses. If you happen to have a Zeiss ZF.2 lens, this should be a great addition.

PRIME-CIRCLE RingKits for ZF.2 Series Lenses and PRIME-CIRCLE XT Custom Lens Kits

The PRIME-CIRCLE project offers to ZF.2 Series users the choice to upgrade their still-photography lenses to a more performing cine-style mode.

Prime-Circle RingKits are available for every ZF.2 lens in the market and the DIY (do it yourself) concept makes it really easy to install.

The RingKit is based on a ultra-lightweight ergo-focus gear for follow-focus, featuring also an extra-grip ergonomic ring when using the camera on the run in hand-held focus mode, a Front Mount 95 standard ring-mount for matte-boxes and cine-style accessories (90mm filter thread) plus an aluminum cap with clear graphics displaying the lens size and f/aperture.

The PRIME-CIRCLE Front Mount is designed to match exactly the ZF.2 Lens and the circular grooves offers the best  solution to prevent internal reflections and flares when using large flat surface optical filters in matte-boxes: a solution used in expensive cinematography primes lenses.

The PRIME-CIRCLE Front-Mount is designed to offer full-frame 24X36 coverage with ZF.2 18mm f/3,5.

The choice to use ZF.2 Series Lenses (built only in Nikon F Mount) with the X-Circle lens mount (Nikon F-Mount to Canon EF Mount) opens your beloved ZF.2 to both worlds, ready to go in every direction the digital sensor race is going. Nikon or Canon F-Mount and EF Mount on the same lens!

The X-Circle Mount features Side Index View (pat.pend.) for focus and aperture scales on the side of the lens barrel and the sophisticated EF Cine-Lock Bayonet  (pat.pend.) for  cine-style locking of the lens on the camera.

A real important step ahead to cinematographers demanding  for precise follow-focus work with F-Mount and EF Mount  cameras.



The PRIME-CIRCLE XT are custom mounted ZF.2 lenses offering “in-house” assembling  by professional technicians.

The XT Custom Series also offers a Side Code Barrel displaying with clear graphics the lens size for immediate coding of the lens mounted on the camera!

Another solution inspired by cinematography primes! On movie production sets the lens size has always to be reported into the camera shooting log form,  that's why the lens size is displayed clearly on the side of the PRIME-CIRCLE XT  lens barrel.

Aperture ring de-click and dampening with an aperture gear coming soon for  a wonderful “shift on the fly” exposure control!

Prime-Circle XT offers double choice X-Circle (pat.pend.) bayonet:  interchangeable F-Mount and EF Mount in the same lenses set.

An aluminum custom cap with enhanced graphics for front  lens size coding and rear professional lens cap is supplyed with the lens.

An aluminum custom cap with enhanced graphics for front  lens size coding and rear professional lens cap is supplyed with the lens.

Several different XT Custom Lens Kits will be available with  PRIME-CIRCLE custom flight-cases (hand baggage size) for tough protection during transportation.

An innovative matte-box (MAT-BOX), that covers the 18mm/3,5 angle of view on Full Frame 24X36, featuring Sliding Compensation of ZF.2 lenses will be available soon, together with the exclusive PRIME-CIRCLE 90mm Series screw-in filters.

PRIME-CIRCLE RingKits can be ordered now, shipment starts from end of March 2012

PRIME-CIRCLE XT Custom Lens Kits are built only by special order!  Sales limitations in some countries.

For more information:  info@lockcircle.com            

PRIME-CIRCLE highlights

  • 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.
  • Front Mount with 95mm size mount for professional cinematographers matte-boxes and accessories
  • Filter thread 90mm for PRIME-CIRCLE 90 Series professional filters – coming soon!
  • Nikon F-Mount and Canon EF-Mount with the same lens.
  • Exclusive SIDE INDEX VIEW (pat.pend.) for easy to read focus/aperture settings – EF Mount only!
  • Innovative X-Circle Cine-Lock (pat.pend.) with improved locking mount for cine-style focus work.
  • X-Circle Side Index View and Cine-Lock features for Nikon F-Mount coming soon! (pat.pend.)
  • Easy to mount kits with “step by step” instructions (RingKits)
  • Front Mount with circular engraved grooves for superior flare and reflection control.
  • Full coverage Full-Frame 24×36 with ZF.2 18mm f/3,5 (we love FF Cinema – The Big Window!)
  • Side Code Barrel with engraved lens size – immediate lens coding for production crew reports  (XT only)
  • PRIME-CIRCLE is designed by a cinematographer on the field to improve shooting quality!
  • Aperture Gear in pre-production for wireless control of aperture ring (XT only)
  • Dedicated matte-box with sliding compensating base  (MAT-BOX) coming soon!
  • Custom Flight – Cases in flight hand luggage size!

Disclaimer: they are planet5D sponsors but we don't publish this news just because they're paying us. We publish gear news because our users have asked us to let them know when we find things that may help them improve their shooting. If you're a gear maker and would like us to publish your HDSLR related products, please contact planet5D

(cover photo credit: snap from the PR)

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