pdf Brochure of B4 Mount Lenses

Super-16 at Abakus
.Abakus
Viewfinder Extender
Abakus 132 Converter
Converts video lens to super-16
This Abakus Unit is for the direct optical
conversion of 2/3" video lenses into Super-16
format. The stainless steel B4 mount at the front
of the unit fits onto the rear of B4 video lenses
and at the rear of the unit interface with super-16
cameras using an Arri PL mount. This maximises
the use of video lenses for super-16.
Abakus Super-16 Stadium Lens
The Abakus Super-16 Stadium Lens is the widest
ultra-wide F-theta lens available for Arri PL
mounts. The diagonal angle of view is a massive
210°. Unlike fish-eye lenses the F-theta lens have
minimal distortion in any one sector of the shot
and can be panned during use without ill effects.
Although the Stadium lens for video was
designed for sports use in large spaces, the super16 film version is ideal for creating an atmosphere
(e.g. claustrophobic) in small spaces. The lens is
designed to take one or two fixed standard
40.5mm internal filters e.g. star filters, making it
an ideal artistic/fun lens to use. A rotatable filter
holder is now supplied as standard.
Design and Manufacture of
Lenses and Optical Systems
The Abakus Viewfinder Extender relays the
viewfinder image closer to the operators eye,
even when panning and tilting, just like a
35mm setup. It has been designed to increase
the comfort and ergonomic efficiency of
professionals using most broadcast cameras,
including HD cameras from Sony, Panasonic,
Ikegami and Thomson. It now has an increased
eyepiece adjustment of +/- 6 diopters (original
was +/-4 diopters) so it is comfortable all for
camera operators. The Eyepiece Extender
interfaces with the camera via an adapter
available from Chrosziel’s and a levelling arm,
available from Arri or Ronford-Baker.
Abakus
High Definition
and Standard Definition
“B4” Mount lenses
For further information contact:
Abakus Scientific,
Grange Farm, Bourne Road, Carlby,
Stamford. PE9 4LU, UK
Tel: +44 (0)1778 590 117
Fax: +44 (0)1778 590 118
E-mail: [email protected]
www.abakus-scientific.com
Shot (courtesy of Lemac) shows the arc of vision through an
Abakus Stadium lens at Melbourne Cricket Ground Australia
Abakus Stadium Lens
Abakus Arena Lens
Picture Diagonal
210°
Focal length
3.5 mm
Picture height 4x3 (SD)
113°
Picture height 16x9 (HD)
90°
Picture width 4x3 (SD)
156°
Picture width 16x9 (HD)
170°
Closest Focus from front
0 mm
Focus movement
85°
Max relative aperture
T2.0/f1.8
Front glass to flange distance
195 mm
Front Glass Size
108x74 mm
Picture diagonal
140°
Length
208 mm
Focal length
5.5 mm
Weight
2.1 kg
Picture height 4x3 (SD)
72°
Picture height 16x9 (HD)
58°
Picture width 4x3 (SD)
101°
Picture width 16x9 (HD)
114°
Closest Focus from front
100 mm
Focus movement
85°
Max relative aperture
T2.0/f1.8
Front glass to flange distance
165 mm
Front Glass Size
90 mm
Length
188 mm
Weight
1.7 kg
The inspiration for this lens was the Football
World Cup 1998, when it was realised that there
were no lenses available that could cover the
whole of a stadium in a single shot. The Abakus
Stadium lens solved the problem with its 210 °
diagonal view. It won the SATISFACIT 2000
award for lens innovation and has its debut at the
2000 Sydney Olympic Games where it was
suspended above the main arena to show the
culmination of set pieces during the opening
ceremony. It is used extensively for views of the
whole pitch of soccer matches.
The Abakus Arena lens is as wide as is possible to
enable sensible front lens protection with a
105mm screw-fit window. This robust lens with
its wide angle of 140° was used extensively when
the scores were shown on TV during the
Manchester Commonwealth Games 2002. It has
also been used for cricket Test Matches, rugby &
football to show the whole of the ground in a
single shot.
Abakus Theatre Lens
Picture diagonal
100°
Focal length
6.5 mm
Picture height 4x3 (SD)
60°
Picture height 16x9 (HD)
48°
Picture width 4x3 (SD)
80°
Picture width 16x9 (HD)
88°
Closest Focus from front
200mm
Focus movement
85°
Max relative aperture
T2.0/f1.8
Front glass to flange distance
165mm
Front Glass Size
90 mm
Length
192mm
Weight
1.6kg
The Abakus Theatre wide angle F-theta lens
has minimal distortion. Its inspiration was to
enable difficult TV shots in places such as
the Albert Hall in London. It was designed
for used in large internal environments.
All the F-theta lenses can be used for both
Standard and High Definition TV. All take
standard 40.5mm internal filters.