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Superconducting magnets is not commonly used in magnetic lenses, e.g. in EM (electron microscope) systems, even though they can provide a high magnetic field. The reason is that the superconducting coils can not generate a narrow (highly confined) field distribution. Recently, superconducting shield lenses using the Meissner effect have been used to make the narrow magnetic field [1]. However, the technology for the production of such lenses was very difficult and inappropriate for commercial production.

[1] Lefranc, G., Knapek, E., and Dietrich, I. 1982. Superconducting lens design, Ultramicroscopy, 10(1/2), 111–123.