Carl Zeiss Jena, 221904

Model FZE

Large microscope with interchangeable tubes and centering slide condenser, c. 1929

The F series of microscopes was produced by Zeiss during the years 1927-1935. The series consisted of a group of large microscopes that came with interchangeable tubes. The various models in the series differed with respect to the tubes, stages, and condensers supplied with the microscopes. The FZE model was the most elaborate and expensive microscope in the series. It represents a top-of-the-line microscope offered by Zeiss during that time period. The example shown here appears to be in nearly unused condition.

Carl Zeiss Jena, 221904. Model FZE Microscope

Carl Zeiss Jena, 221904. Model FZE Microscope

Carl Zeiss Jena, 221904. Model FZE Microscope

Carl Zeiss Jena, 221904. Model FZE Microscope

Carl Zeiss Jena, 221904. Model FZE Microscope

Carl Zeiss Jena, 221904. Model FZE Microscope

Carl Zeiss Jena, 221904. Model FZE Microscope

Carl Zeiss Jena, 221904. Model FZE Microscope. Large mechanical stage

Carl Zeiss Jena, 221904. Model FZE Microscope. Storage case

Carl Zeiss Jena, 221904. Model FZE Microscope. In storage case

Carl Zeiss Jena, 221904. Model FZE Microscope. The accessories

In addition to the binocular and monocular tubes, the accessories supplied with the microscope consist of six Zeiss apochromatic objectives with canisters marked 4, 10 (0.30), 20 (0.40), 40 (0.65), 50 (0.85), and 90 (1.25), three pairs of matched oculars 5x, 10x, and 15x, a slide-in aplanatic condenser, a centering slide, and an assortment of adjusting tools.

The substage of the FZE model consists of a slide-in condenser with  NA 1.4  optics. The iris diaphragm can be offset for oblique illumination. The condenser has centering adjustments.

Carl Zeiss Jena, 221904. Model FZE Microscope. Substage

substage

 

The microscope was purchased for this collection in Canada. The case bears a brass tag indicating it was retailed by the Hughes Owens Co, based in that country.

  Hughes Owens Co.

The arrangement of the prisms in the binocular tube is discussed in "The Binocular Microscope its Development, Illumination and Manipulation" by F. C. Wise, F. E. J. Ockenden and P. K. Sartory, Monograph of the Quekett Microscopical Club No. 5, 1950 as follows:

Fig. 20 shows another system introduced by Zeiss about 1926. Here again interocular adjustment is made by rotation of the uppermost pair of prisms involving no alteration in tube length. In spite of the fact that there are four reflexions on each side no deterioration of the image can be detected when compared with the image in the interchangeable monocular body. In common with all Continental models parallel tubes are used.

prism arrangement

Zeiss FZE model microscope

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