Can a kowa da10 used on kowa 660 eyepieces (1 Viewer)



In all the KOWA material the DA1 is recommended for 660 type scope.
It atttached to the thread of the scope at the point where the eyepiece is fitted to the scope.
The da10 , recommended for the 880 series eyepieces screws on the eye relief of the eyepiece.
The eye relief of 660 type eyepieces can be taken of too, so can the da10 used on that thread ( of the 660 eyepiece) too? If not why is there not a similar adapter for the 660 series as there is for the 880 series?


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