Explore Scientific 2X Focal Extender with Adapter - 2" - FE02-020 Focal Extender fully multi-coated 2-element objective produces

fully multi-coated 2-element objective produces natural stellar and planetary color rendition even at the highest useful powers

Excellent Ergonomics: The innovative recessed volcano top provides clearance for eyelashes and enables a comfortably located eyepoint without the stray light problems of a full volcano top

rather than a thumbscrew that contacts the eyepiece barrel directly

Baader Semi-APO Filter - Round Mounted Features

Filter Type: Semi-APO

Explore Scientific 2X Focal Extender with Adapter - 2" - FE02-020 Focal Extender fully multi-coated 2-element objective producesAbout 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