For Ultima Eyepiece we have a term and definition in Telescope.

Ultima Eyepiece (Telescope)

A specific eyepiece design. Ultima is a "house brand" of Celestron, who use it to label many other products besides eyepieces. Ultima eyepieces have moderate apparent fields of view, of about 50 degrees.
Ultima eyepieces are reported to consist of four to seven lenses, grouped into various combinations of singlets and cemented doublets.

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