Objectives - Zeiss SV 6 Operating Instructions Manual

Objectives
A wide range of objectives is available. Their dovetail ring
mounts makes them easy to change. The objectives differ in
their focal lengths and magnifications, i.e. their free working
distances and resolving powers. As the table shows, one
parameter runs contrary to the other.
Objective / f WD R Cat.No.
Magnification mm mm um
Achromat S 0.63x 160 147 6.1 45 50 63
Achromat S 1.0x 100 90 3.9 | 455060
Achromat S 1.6x 63 48 25 | 455061
Achromat S 2.5x 40 27 1.5 | 455069
Planachromat S 1.0x | 100 87 3.9 | 455070
Duo DS 1.0x 『 100 86 3.9 | 455068
f = focal length of objective WD = working distance
R-= minimum distance between periodic lines which can still just be resolved. (Data valid
for SV 11, maximum zoom and fully open aperture diaphragm, data for SV 6 lower.) -
All objectives S and DS, except S 2.5x, feature an internal thread
E 49x0.75 on the front of the mount. Here, filters available from
camera dealers or the slit-ring illuminator (see page 13) can be
attached using the relevant holding ring (45 51 84). These
objectives have 53mm outside diameters.
Objectives with long working distances
To attach these objectives to the stereo body, the adapter Med
(45 51 61) is reguired.
The adapter ring consists of 2 parts. For mounting unscrew the
front part, screw in Med objective and screw on front part again.
M WD Cat.No.
mm
Objective f=200 mm 0.5x 200 | 3051 32
Objective f=250mm 0.4x 250 | 305705
Objective f= 300mm 0.33x 300 | 305137
Objective f= 350mm 0.28x 350 | 305707
Objective f=400mm |0.25x | 400 | 305146
f = focal length M = magnification WD = working distance
Further objectives up to f = 2,000 mm are available.
The different objectives are used in the following specific fields:
Achromat S 0.63x (45 50 63)
Objective with extremely good field flattening.
They image large object fields with edge-to-edge sharpness and
pronounced depth of field.
The long working distance of 147 mm makes the object easy to
handle.
Achromat S 1.0x (45 50 60
Standard objective for all types of routine work.
Its working distance of 90 mm offers enough room for
manipulation of the object.
Achromat S 1.6x (45 50 61)
Objective with a high magnification and a high resolving power.
Achromat S 2.5x (45 50 69)
Objective with a highest magnification and a highest resolving
power. The field of view will be vignetted with zoom n settings
below 0.8x. ve
Planachromat S 1.0x (45 50 70)
This flat-field objective is ideally suited for the examination nand
photography of specimens with a flat surface, such as wafers,
metal sections and large specimens. The holding ring for
accessories may be unscrewed.
Duo DS 1.0x (45 50 68)
This objective is particularly well suited for low-contrast, three-
dimensional specimens which are to be imaged in their natural
coloring. This objective combines the properties of the
Greenough system with those of the telescopic system.
Intermediate plate (45 51 60
for axial imaging, monocular viewing and optimum image
quality.
The intermediate plate is placed between the objective and the .
stereo body. As the effect of the plate is that the object willino
longer be in the field-of-view center, the stereomicroscope Must
be repositioned by turning it on column 32. This plate is mainly
used in photomicrography, TV microscopy, length
measurements and polarisation.
To obtain a higher total magnification, it is advisable to increase
the magnification of the objective instead that of the eyepiece.