A method for fitting a hearing compensation device comprises selecting a plurality of loudness levels for a plurality of frequencies and comparing each loudness level for each frequency for perceived sameness. The system may comprise a diverging charged particle beam part, in which the lens structure is included. A second electromagnetic solenoid is provided to operate the shifting mechanism to a second shifted position. In the case where there are some failures, decision circuitry determines whether it is more efficient to repeat the tests or repair the semiconductor device, if it is repairable. The mullion assembly includes a base comprising a top surface and a bottom surface, a first light element coupled to said base for producing light above said top surface, and a second light element coupled to said base for producing light below said bottom surface. The objective designs presented have the optical axis of the Mangin mirror image relay at ninety degrees to the optical axis defined by the focusing lenses, or an in-line or straight objective having one ninety degree bend of light rays.