Carl Zeiss Otus 85 mm f/ 1.4 Lens Mode D'Emploi

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Planar
®
 T* 1.4/85
         
80
90
48 to film
CONTAX
®
 N
High speed lenses with a somewhat longer focal length 
are among the most popular in top class 
35 mm SLR camera systems.
For the Contax N system, Carl Zeiss has designed an 
all new Planar® 1,4/85 lens . This lens excels with very 
high image quality over the entire frame, clearly visible 
in the SLR viewfinder. The full speed of f/1.4 can be 
utilized not only for composing and focussing, but for 
actual picture taking, too. At f/1.4, the wide open 
aperture enables image compositions with selective 
focus, that is very pleasing for portraiture. As a novelty 
in such a fast lens, the high performance is maintained 
over the entire focusing range from infinity down to 
minimum object distance.
Carl Zeiss achieves this with a new internal focussing 
design IFD, which moves 6 of the 10 elements for 
focussing. This lens, with its large amount of optical 
glass, and attendant mass provides high stabilization 
during the exposure. Thus, significantly longer 
exposure times can be obtained handheld with good 
results.  These exposure times, combined with a fully 
open aperture of f/1.4 and high speed films enable 
unusual images. 
Preferred use: photojournalism, portraits under 
available light, kids, sports, theatrical and stage 
photography under available light, interiors without 
flash, dynamic subjects requiring fast shutter speeds. 
Cat. No. of lens
10 22 33
Close limit field size
221 mm x 335 mm
Number of elements
10
Max. scale
1 : 8.9
Number of groups
9
Entrance pupil*
Max. aperture
f/1.4
Position
99.7 mm behind the first lens vertex
Focal length
83,0 mm
Diameter
57.5 mm
Negative size
24 x 36 mm
Exit pupil*
Angular field 2w*
width 25°; height 17°;
Position
28.3 mm in front of the last lens vertex
diagonal 29°
Diameter
50.9 mm
Min. aperture
16
Position of principal planes*
Camera mount
Contax N
H
82.7 mm behind the first lens vertex
Filter connection
M 82 x 0.75
H'
43.7 mm in front of the last lens vertex
Focussing range 
infinity to 0.83 m
Back focal distance
40.6 mm
Working distance (between mechanical front end of
Distance between first
lens and subject)
0.70 m
and last lens vertex
85.1 mm
Weight
800 g
* at infinity