2" Twist-lock Eyepiece Barrel Extension,
Self Centering, 35mm, 50mm and 80mm
These collet-type 2" extensions close with a twist of the top
and grips the barrel with a wide, self centering collet type band.
Self centering even with barrels that have safety grooves!
Threaded for 2" filters, interior is baffled and blackened.
Prices include shipping in the USA!