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An apochromatic lens system combines the high edge definition of a aplanatic lens with the chromatic aberration correction of an achromatic lens, making it particularly suitable for reproducing the "true" colour of an object while guaranteeing a very good, distortion-free image. It also provides a greater working distance and significantly better light conditions. These higher quality lenses are also the reason for the jump in price from the 8x to 10x version. A special feature of both the RL-B-6 and RL-B-8 versions, is that the lenses provide an 8° angular view of the graduation. By comparison the RL-B-10 has a vertical view. On all three magnifiers the inside of the stand base has a matt white finish to ensure uniform light distribution. The stable metal housing construction guarantees a long service life for these measuring magnifiers.
As with the basic RL version, the 0.1 mm graduation (brass reticule plate with matt chrome finish and laser engraving) is positioned at an angle of 30° in the base. This measuring instrument can be focussed with its height-adjustable lens systems (sliding focus). This crack magnifier is particularly suitable for inspection and measurement in the metal processing industry. Particularly for this type of application, the metal scale is superior to a glass scale, which can scratch easily. The angled layout allows ensures good light incidence while preventing reflection when the light is bright, making the scale very easy to read off. The limit for metal graduation is approx. 40 µm. If desired remeasurement is possible. This crack magnifier is preferred by technicians and appraisers in the construction field for measuring the width of cracks in concrete. The ocular can be removed from the holder for inspection without contact. Naturally the scales are available separately as replacement parts.