Contax AX
MAJOR FEATURES
- Automatic Back Focus System allows use of existing Carl Zeiss interchangeable
manual focus lens range.
- The ideal move into AF for existing Contax SLR owners.
- No compromise on lens quality.
- Straightforward manual focusing capabilities.
- Choice of auto focusing modes.
- True macro focusing with enhanced macro capability for all lenses.
- High quality, bright viewfinder does not compromise manual focusing.
- Precise exposure control through aperture priority auto, shutter priority
auto, program or manual modes.
- User programmable custom functions.
- Full system integration.
- High quality construction.
Contax AX - the full story A radical new approach to autofocus SLR photography,
is offered by the Contax AX, which incorporates the revolutionary new Automatic
Back Focusing System (ABF). Through the development of a camera with all
the focusing functions inside the body, the Contax AX has retained the legendary
high quality capabilities of Carl Zeiss manual focus interchangeable lenses,
while offering the convenience of a sophisticated AF system. The photographer
may choose between automatic or traditional manual focusing, with no compromise
in either quality or ease of operation.
Alloy chassis, top and bottom plates ensure maximum durability and a wide
range of exposure options plus supreme accuracy ensure that the highest
standards of photography can be attained. The Automatic Back Focusing System
consists of two main components, the rigid camera body and standard Contax/Yashica
lens mount, plus a movable module containing the reflex mirror, pentaprism
assembly and film plane. Manual focusing is accomplished in exactly the
same manner as on any other Contax SLR, by rotating the focus ring on the
lens mount.
The autofocus system is engaged by pressing a button on the rear of the
Contax AX body and a choice of three modes, single autofocus, continuous
autofocus or macro, is then available. In the single autofocus (SAF) mode,
the camera sets and locks focus instantly, the user being free to make any
manual fine adjustment via the lens focusing ring, should it be deemed desirable.
This gives complete freedom of creative expression through manual depth
of field control.
When set to continuous autofocus (CAF) mode, the Contax AF focuses continually,
updating the focusing point and using its predictive programming to ensure
sharp focus of moving subjects. The speed at which this operation is carried
out means that the photographer is much less likely to miss out on fleeting
opportunities. Selection of the macro mode implements repositioning of the
movable module to a maximum rear position, ten millimetres behind the standard
focal plane point. The increased lens extension thus achieved allows extreme
close range photography beyond the minimum focusing distance of any attached
lens, without the need for any attachments or accessories.
For macro use, the autofocus is disabled and manual focusing employed, because
changing the lens to film distance alters magnification, while changing
film plane to subject alters focus in macro photography. Because the Contax
AX will be used by discerning photographers who will understand that both
manual and automatic focusing have their own specific advantages, the viewing
system is designed for ease of use in both modes.
The camera incorporates the bright viewfinder and built in dioptre correction,
similar to that found on on other Contax models, while the large pentaprism
required by the Automatic Back Focusing System provides further refined
optical benefits, large field of view and enhanced brightness.
The Contax AX retains many of the favoured features of its manual focus
predecessors, including the now traditional solidity. The top cover plate
is titanium alloy, the bottom cover is hardened aluminium and both the main
chassis and movable module are constructed from diecast aluminium alloy
to combine durability with minimum weight. For simplicity and functional
design, main control operations are carried out by traditional knobs, a
system which has found much approval from existing Contax owners.
One touch operation of the metering selection lever switches between centre
weighted average metering, for general photography, and spot metering for
strict exposure determination. The spot metering area corresponds to a five
millimetre circle in the centre of the viewfinder. The exposure control
modes provided are aperture priority auto, shutter priority auto, programmed
auto and manual exposure.
The high precision shutter has a comprehensive range of speeds, from a longest
exposure of 32 seconds to a fastest of 1/6000, dependent on the exposure
mode selected. Flash synchronisation is available up to 1/200 second. In
recognition that different photographers attach differing priorities to
camera controls, the Contax AX has been equipped with a series of programmable
functions. These include exposure check button functions, multi exposures,
automatic bracketing control (ABC) sequence, constant or intermittent selection
of depth of field preview, film leader position after rewind, rewind start
method, AF auxiliary light on/off selection and the activation or de-activation
of audible electronic focus indication.
An optional multi-function Data Back D-8, specifically designed for the
AX, allows convenient recording of information between frames, including
dates, times, shutter speeds, apertures, exposure mode and two letters,
in addition to counter numerical values and user selected numbers. The photographic
data may also be be imprinted on the fist and second frames. As well as
data imprinting, the Data Back D-8 provides an intervalometer function,
with time delays ranging from two seconds to over four days. Available from
late May, the Contax AX body will sell for around £1899.99 including
VAT, the optional Data Back D-8 at around £499.99.
CONTAX AX SPECIFICATIONS
- TYPE 35mm Autofocus SLR body with focal plane shutter
- BAYONET MOUNT Contax/Yashica
- SHUTTER Electronically controlled, vertical travel metal focal plane
type
- SHUTTER SPEEDS Auto: AV & P - 32 seconds - 1/6000, TV - 4 seconds
- 1/4000 Manual: 4 seconds - 1/4000, B and X settings.
- FLASH SYNCHRONISATION 1/200 second or slower
- SHUTTER RELEASE Electromagnetic with additional cable release socket
- SELFTIMER Electronic with 2 or 10 seconds delay
- VIEWFINDER Eye-level pentaprism finder, 95% field of view, 0.7x magnification
- FOCUSING SCREEN FW-1 interchangeable, horizontal split image/microprism
type, with 4 further types being available as optional accessories
- DIOPTRIC ADJUSTMENT +0.5 Dioptres to -2 dioptres
- VEWFINDER DISPLAY Aperture value, shutter speed, exposure warning,
flash indicator, exposure compensation, exposure counter, focus, back focus
scale
- EXPOSURE MODES AV, TV, P, M
- METERING SYSTEM TTL SPD centre weighted average or spot meteringªzone
approx 5mm circle, AE lock.
- METERING RANGE (at ISO 100 and f/1.4) Centre weighted average metering:
EV 0 - 21 Spot metering: EV 3 - 21
- FILM SPEED RANGE ISO 6 - 6400 for manual settings, ISO 25 - 5000 for
DX coded films
- EXPOSURE CHECK By half pressing the shutter release button
- EXPOSURE COMPENSATION +/- 2EV in 1/3EV increments
- AE LOCK Available
- ABC MODE Auto bracketing control, +/- 0.5EV to +/- 1EV
- FLASH TTL Direct flash control, auto X setting with Contax TLA flash
units
- AUTOFOCUS Automatic Back Focusing System, TTL phase difference detection,
focus modes: focus priority - SAF with electronic audible signal available,
release priority - CAF, moving object prediction function available in CAF
mode, audible AF function signal (may be switched off), AF auxiliary light
on demand, AE lock available. Depth of field button fitted.
- LENS MOUNT Standard Contax/Yashica mount
- FILM LOADING Automatic film advance to first frame
- FILM ADVANCE Automatic with built in motor, single or continuous advance
at approximately 5 f.p.s., multiple exposure mode.
- FILM REWIND Automatic, auto stop
- EXTERNAL LCD DISPLAY ISO, DX indicator, multiple exposure indicator,
film indicator, frame counter, battery warning
- POWER SOURCE One 6 volt lithium battery (2CR5), optional external
Power Pack P-8 (4 x AA batteries)
- DIMENSIONS 162mm (W) x 123.5mm (H) x 72mm (D)
- WEIGHT 1080 grams (without battery)
- CONSTRUCTION Aluminium alloy diecast chassis, titanium alloy top cover
plate, hardened aluminium bottom cover. Removable back may be exchanged
for optional data back.
CONTAX DATA BACK D-8 SPECIFICATIONS
- TYPE Multi-function data back
- RECORDING MODES · Year/month/day (sequence may be changed) plus
2 different letters · Day/hour/minute plus 2 different letters ·
Photographic data (photographic mode or 2 letters · Number of exposed
frames · Random fixed numerical values (six digits plus 2 letters)
· Data imprinting switched off Data characters: A to Z and 0 to 9 Photographic
data: Aperture value, shutter speed, exposure compensation, exposure mode
- INTERVALOMETER Starting times may be set in day, hour minute. Intervals
from 2 seconds to 99 hours 59 minutes 59 seconds, from 1 to 99 exposures.
- DATA POSITION Imprint available between frames and on first and second
frame
- FILM SPEED SETTING Automatic
- POWER SOURCE Two 3 volt lithium batteries (CR2025)
- DIMENSIONS 150mm (W) x 56mm (H) x 32mm (D) WEIGHT 150 grams (without
battery)
Photon review, April 1996
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