Adapter 2''a / T-2a plug-in anslutning för insättning i alla 2" fokuserare

Telescope-side 2"a inner diameter, focus-side T-2a external thread (effective optical path only 3mm), telescope-side with 48mm filter thread for 2" colour and nebula filters and with safety groove on the 2" outside outer diameter - so that even the heaviest accessories cannot fall out!