Specialobjektiv

Specialobjektiv (special objective) is a lens designed for a particular imaging task, in contrast to general‑purpose lenses. The term is commonly used in German‑language technical literature and in optical engineering to describe objective lenses for cameras, microscopes, or industrial imaging systems that are optimized for a specific working distance, magnification, field of view, or wavelength range.

Common examples include macro and micro objectives used for high‑magnification close‑up work; telecentric objectives favored in metrology for perspective accuracy; tilt‑shift goals that control perspective and plane of focus in architectural and product photography; fisheye and ultra‑wide‑angle objectives for extreme field of view; and chromatically corrected apochromatic or specially coated lenses that minimize aberrations across the spectrum. In microscopy, many special objectives are designed with fixed magnification and standardized thread mounts (for example RMS) to fit dedicated instrument stands.

Design considerations for specialobjektive include focal length, working distance, magnification or image circle, optical correction (chromatic, spherical, field curvature), coatings to reduce flare, and compatibility with sensor size and mounting systems. Some require specialized illumination or adapters, and accurate calibration is often necessary to realize their intended performance.

Applications span scientific research, medical and dental imaging, industrial inspection and metrology, astronomy, and artistic or documentary photography that benefits from controlled optics or unusual perspectives.

Although the term is generic, the exact specifications and naming vary by manufacturer and field; users should consult product pages or datasheets for a given objective to understand its intended use and compatibility.