• Maximum contrast and resolution over the entire focal range.
• Uniform and constant position of the scales.
• The scales can easily and clearly be read from both sides, as can be the focal length.
• Scales in m or ft can be easily exchanged.
• Uniform overall length of the main focal lengths.
• Uniform weight of the main focal lengths.
• Service-friendly modular design with easily exchangeable front and back elements.
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