No experience with that particular scope, but I had a hell of a time making up my mind between the 127mm F9.5 & the 152mm F8.
I wanted the 127mm for your reasoning precisely: less CA than the F8. I went the 152mm in the end, I just couldn't bring myself to pass up the opportunity to get the bigger aperture.
I'm glad I did now. The F8 has tolerable CA & the fringe killer filter pretty well nips the CA in the bud.
I'll be looking forward to a review on the 127mm if you decide to get it.
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