TeleVue 2" Barrel Extender

TeleVue 2" Barrel Extender

The 2" Eyepiece Barrel Extender (EBX-2120) increases backfocus distance and provides a mounting location for 2" (48 mm) eyepiece filters. It can also help parfocalize eyepiece sets. Extender adds 1.2-inches to the 2" barrel.

Ethos
Models with dual 2" / 1.25" barrels can use the extender.

12 mm Nagler Type-4
The EBX-2120 makes the 12 mm approximately parfocal with the 17 mm and 22 mm Nagler Type-4 eyepieces when used in a Tele Vue 2" diagonal.

55 mm Plössl
Because the field stop is located near the bottom of the chrome eyepiece barrel, you will need to rack your focuser out further, relative to most other eyepieces. If you find that you cannot rack your focuser out enough to achieve focus, we strongly recommend you purchase our EBX-2120. This will make Tele Vue´s 55 mm Plössl eyepiece approximately parfocal with their 27 mm Panoptic eyepiece.


Note: When joining eyepieces with dual 2" / 1.25" barrels to the 2" Barrel Extender (12 mm Nagler Type-4 shown), remove the lock screw in the 2" barrel section of the eyepiece.

Safety informations: PDF Download