TSN-EC3 eyepiece conversion ring
Required when using a TSN-82SV/TSN-660M/600 series eyepiece with a TSN-880/770 series.
When other model eyepieces are used with TSN-880/770 Series scopes, not only will the specifications including the magnification change, but there may be cases where an adequate optical performance cannot be obtained.
Ready to ship today,
delivery time approx:1-3 workdays