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ARRI/ZEISS
12
master Prime
A Technological Challenge
Even five years ago, the creation of a 12mm
lens at T1.3 with Master Prime optical quality
would have been technologically impossible.
However, recent advances in high tech optics
design, testing and manufacturing have allowed
ARRI and ZEISS to start thinking about new and
innovative lens designs.
One of the main contributors to achieving such
a unique combination of qualities was the use
of aspherical lens elements. Aspherical lens
elements have been used for a while now in
many ARRI/ZEISS primes because of their ability
to reduce size and weight while improving
image quality. After a number of optical redesigns
it became clear that the Master Prime
12 required two aspherical elements in order
to reach the desired optical quality. Furthermore,
the aspherical front element had to be
of a size that exceeded anything incorporated
into cine lenses before. Luckily, the creation of
large aspherical lens elements is a technology
that has been aggressively developed by ZEISS’s
Semiconductor and Nanotechnology business
units. With their assistance it was possible to
create such a lens element and to develop the
necessary special testing instrumentation. A new
pinnacle in optical design and manufacturing
has been reached with the Master Prime 12.
The Master Prime 12 aspherical front element (left) in com -
parison to the Ultra Prime 8R aspherical front element (right)
while manufacturing.
T E C H N I C A L D A T A
ARRI/ZEISS Master Prime 12
Type 11 Distagon T* XP
Lens Mount 1 PL LDS
Aperture T1.3 – T22
Close Focus 2 0.40m / 16"
Magnification Ratio 3 1:16.5
Length 4 249mm / 9,8"
Front Diameter 5 156mm / 6.1"
Maximum Housing Diameter 156mm / 6.1"
Weight (Kg) 2.9
Weight (lb) 6.4
Entrance Pupil 6 38.09mm
Angle of view
Normal 35 8
ID = 27.20mm 7
DIN Super 35 9
ID = 30.00mm 7
ANSI Super 35 10
ID = 31.14mm 7
Main Features
• A One-of-a-Kind Lens
– Extreme wide angle – 12mm
– Straight image geometry – rectilinear
design
– Fast – T1.3
• A One-of-a-Kind Look
– Wide, straight and fast are a unique
combination
• A One-of-a-Kind Family
– 15x Master Primes from 12 to 150mm
– True T1.3
– Matched optical quality
– Color matched to Ultra 16, Ultra Primes,
Lightweight Zoom LWZ-1, Master Diopters
83.87° – 66.44° – 96.13°
H – V – D
88.85° – 72.70° – 101.97°
H – V – D
90.98° – 74.78° – 104.26°
H – V – D
Notes support post included
Operation Temperature: -20°C to +40°C / -4°F to +104°F
Storage/Transport Temperature: -40C to +70°C / -40°F to +158°F
1. Positive locking (PL) 54 mm stainless steel lens mount with Lens Data System
(LDS) contacts
2. Close focus is measured from the film/sensor plane
3. Magnification ratio is the relationship of the size of an object on film (first
number) to the size of that object in real life (second number) at the close focus
setting
4. Length is measured from the lens mount to the front of the lens housing
5. Diameter of the lens/matte box interface
6. The distance from the entrance pupil to the film/sensor plane at focus = infinity.
Positive numbers indicated an entrance pupil in front, negative numbers
indicated an entrance pupil behind the film/sensor plane.
The entrance pupil (often mistakenly called "nodal point") is the center of
perspective; moving the camera/lens system around the center of the entrance
pupil prevents parallax errors.
While largerly irrelevant for live action, this measurement is important for
special effects work.
7. The image diameter (ID) is the diameter of the image circle needed for the
respective format. These lenses are designed for the largest ID given here.
8. Horizontal (H), vertical (V) and diagonal (D) angles of view for a Normal 35
Academy camera aperture (aspect ratio 1.37:1, dimensions 22mm x 16mm /
0.8661" x 0.6299")
9. Horizontal (H), vertical (V) and diagonal (D) angles of view for a DIN Super 35
Silent camera aperture (aspect ratio 1.33:1, dimensions 24mm x 18mm /
0.944" x 0.7087")
10. Horizontal (H), vertical (V) and diagonal (D) angles of view for an ANSI Super
35 Silent camera aperture (aspect ratio 1.33:1, dimensions 24.9mm x 18.7mm
/ 0.980" x 0.7362")
11. T* XP is the trademark for the high end Zeiss anti-reflex lens coating that
reduces veiling glare and other reflections. XP stands for extended performance.
All data subject to change without notice.
C a m e r a
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