posted a review of the new Panasonic 45-175mm X-series lens. It is not terribly worth mentioning --EPZ has terrible lens reviews; I don't know why they bother--- but a major review of this lens has been long awaited.
While the resolution charts are useless, the chromatic aberation charts are not, and the lens performs acceptably well on Panasonic bodies. Remember, these lenses all have automatic correct for this on Panasonic's bodies, so the real numbers are much higher. If the amount is near zero, that's fine, but at many lengths and apertures, the numbers are nowhere near it, meaning that the lens' actual, optical quality is very disappointing.
Unless another review produces some seriously good data, I'm not going anywhere near either X-series lens.