Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter provide extra focuser back travel sometimes needed to achieve focus with certain eyepiece or telescope combinations.
Extension tube provides extra focuser: back travel often needed for short range terrestrial viewing through a telescope; or for astrophotographic applications
Features two locking thumbscrews to secure any inserted astronomy accessory; with a brass compression insh to prevent the marring of your telescope accessories
The four-lens design with multi-coated surfaces eliminates most of the chromatic aberrations that show up with Barlow lenses having fewer components; A Barlow lens can therefore be a great supplement to your eyepiece collection
The Alstar Barlow lens provides 2.5 times greater magnification; allowing you to observe objects at a significantly closer apparent distance
Alstar 1.25" Color/Planetary Filter - #80A Blue
SAR 84
Alstar 12.5mm Illuminated Reticle Plossl Telescope Eyepiece - for Perfectly Guided astrophotos
SAR 162
Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter - Optical Length 80mm - with Standand 2-Inch Filter Threads
SAR 188
Alstar 1.25" 25mm Plossl Telescope Eyepiece - 4-Element Plossl Design - Threaded for Standard 1.25inch Astronomy Filters
SAR 120
