Explore Scientific 2X Focal Extender with Adapter - 2" - FE02-020 Focal Extender Baader Semi-APO Filter - Round

Baader Semi-APO Filter - Round Mounted Features

25x magnification porro prism binocular

Filter Type: Semi-APO

The TeleVue Dioptrx Adapter - DNA-6000 is recommended only for deep-sky use

Cleaning Cloth & Case: Keep the microfiber cleaning cloth stashed in your Celestron Observer''s Accessory Kit so that it will always be handy

Explore Scientific 2X Focal Extender with Adapter - 2" - FE02-020 Focal Extender Baader Semi-APO Filter - RoundAbout the Explore Scientific 2X Focal Extender w Adapter 2" An Explore Scientific Focal Extender does exactly what the name implies; it extends the effective focal length of the lens that it is used in conjunction with, thus producing higher magnifications for imaging and visual applications. Focal extenders are similar to a Barlow or tele negative lens, but there is one important difference between the two that you will want to take into