Canon EF 85 mm f/ 1.2 L II USM Lens 技术手册
Tele-Tessar
®
T
* f/4 - 300 mm
The 300 mm Tele-Tessar
®
T
* f/4 lens offers a long
focal length, remarkably high speed, compact
design and easy operation at one and the same
time. It is a telephoto design where the distance
between the front lens vertex and the rear focus is
only about 80% of the focal length. It offers
virtually perfect monochromatic correction and
excellent image quality even at full aperture - a
decisive improvement over earlier telephoto
designs.
It is, however, the mechanical construction of the
lens that allows full utilization of its superb optical
performance. The lens is easy to handle despite its
long focal length, and the favourable
opto-mechanical transmission ratio of the focusing
helicoid offers the
design and easy operation at one and the same
time. It is a telephoto design where the distance
between the front lens vertex and the rear focus is
only about 80% of the focal length. It offers
virtually perfect monochromatic correction and
excellent image quality even at full aperture - a
decisive improvement over earlier telephoto
designs.
It is, however, the mechanical construction of the
lens that allows full utilization of its superb optical
performance. The lens is easy to handle despite its
long focal length, and the favourable
opto-mechanical transmission ratio of the focusing
helicoid offers the
photographer more flexibility. The lens hood which
is connected with the outer barrel can be pushed
back for transport. For shooting from a tripod, the
lens has a tripod socket positioned approximately at
the centre of gravity of the lens-camera
combination. The camera can be swung through
90% for the transition from horizontal to vertical
shots.
is connected with the outer barrel can be pushed
back for transport. For shooting from a tripod, the
lens has a tripod socket positioned approximately at
the centre of gravity of the lens-camera
combination. The camera can be swung through
90% for the transition from horizontal to vertical
shots.
This Tele-Tessar
®
lens is ideal for large-size pictures
of distant subjects and for photographing at long
distances without being observed. The relatively
long focal length makes the main subject stand out
distinctly against the background, an effect often
required by photographers.
distances without being observed. The relatively
long focal length makes the main subject stand out
distinctly against the background, an effect often
required by photographers.
Cat. No. of lens:
10 45 31
Filter connection:
clip-on filter, diameter 85 mm
Number of elements:
5
screw-in type, thread M 82 x 0.75
Number of groups:
5
Weight:
approx. 1170 g
Max. aperture:
f/4
Focusing range:
∞
to 3.5 m
Focal length:
300.0 mm
Entrance pupil:
Negative size:
24 x 36 mm
Position:
238.4 mm behind first lens vertex
Angular field 2w:
8.2º diagonal
Diameter:
75.0 mm
Mount:
focusing mount with bayonet;
Exit pupil:
TTL metering either at full aperture
Position:
31.9 mm in front of last lens vertex
or in stopped-down position.
Diameter:
32.8 mm
Aperture priority/Shutter priority/
Position of principal planes:
Automatic programs
H:
153.3 mm in front of first lens vertex
(Multi-Mode Operation).
H':
54.6 mm in front of first lens vertex
Built-in lens hood.
Back focal distance:
89.2 mm
Aperture scale:
4 - 5.6 - 8 - 11 - 16 - 22 - 32
Distance between first and
last lens vertex:
last lens vertex:
89.2 mm