I don't disagree that Izar can be seen with a 60mm. There is an old thread in here about how small a scope can actually still see it. But a 60mm scope has the center of the first diffraction ring at about 2.9 arcsec and the outside of that same ring perhaps at 3.1-3.2 arcsec. So, Izar (2.8 arcsec) hasn't got a chance of being placed on the outside of the diffraction ring as seen in a 60mm scope. It's right smack dab near the middle of it, in fact, leaning towards the inside. Perhaps the confusion lies in where you think the ring is???
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