Beatsy, Pau,. . .now I'd like an N.A. 0.75+ epi objective with at least 8mm working distance. Preferably around 64x or less. Fat chance
Not quite what you're asking for, but maybe close enough: The Mitutoyo 100x/0.70, with 6mm working distance, mounted on a 125mm converging lens to achieve 62.5x? Granted that we don't know if this combo would work--lower NA Mitties seem to tolerate converging lenses of shorter focal length than the intended 200mm, but we'd expected this tolerance to decrease with increasing NA.
I have the 100x Mitty, but no prime around 125mm to try it with. The Raynox DCR-250 Macroscan Conversion lens has a 125mm focal length, and would appear ideal. (This, of couse, is the shorter brother to the 208mm focal length Raynox DCR-150 commonly used as a converging lens.)
--Chris