Kowa Eyepiece Converter/Adaptor for using a TSN-82SV/660/600 Series Eyepiece with TSN-820/820M Scope

Required when using a TSN-660/600 series eyepiece with a TSN-820/820M series scope. When other model eyepieces are used with TSN-820/280M series scopes,not only will the specifications including magnification change, but there may be cases where an adequate optical performance cannot be obtained. 
Compatible products;
TSN-601 60mm angled body 
TSN-602 60mm straight body
TSN-663 66mm angled body
TSN-664 66mm straight body
TSN-82SV 82mm angled body