{HEAD ~ The relay lens system} comprises {TAIL ~ a plurality} of relay lens units at least one of which allows longitudinal chromatic aberration to remain in an undercorrected tendency and at least another of which allows longitudinal chromatic aberration to remain in an overcorrected tendency, thereby correcting longitudinal chromatic aberration favorably in the relay lens system as a whole 
comprises
{ HEAD ~ The relay lens system } comprises { TAIL ~ a plurality } of relay lens units at least one of which allows longitudinal chromatic aberration to remain in an undercorrected tendency and at least another of which allows longitudinal chromatic aberration to remain in an overcorrected tendency , thereby correcting longitudinal chromatic aberration favorably in the relay lens system as a whole
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