For Unit-magnification Finder we have a term and definition in Telescope.

Unit-magnification Finder (Telescope)

A finder which operates without magnification, as do many rifle 'scopes. Such a device is in essence a miniature head-up display: It projects a cross-hair, illuminated bulls-eye, or similar pattern on the sky, where the observer may view it easily with both eyes open. Unit-magnification finders make it very easy to find objects which are bright enough to be seen with the naked eye, or which are close enough to naked-eye stars.

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