[baj (Brad)]

I going down the path of a 3 inch 0.85x reducer/coma corrector for a 10 inch F4 newtonian with a 3 inch focuser. My current secondary mirror is 88mm.



Any thoughts on whether the secondary will need to larger for a full frame sensor. If so what size secondary would be sufficient for a full frame sensor?


The 3 inch 0.85x corrector is expensive so I am wondering whether this is an option that just won't work. Large secondary mirrors also seem surprisingly expensive even on aliexpress



Regards,
Brad