Eliminate the need to make focus adjustments when changing telescope eyepieces.
With parfocal ring equipped telescope eyepieces you can change magnifications quickly and easily.
This set of 2 Alstar Parfocal Rings lets you make a set of non-parfocal 2" telescope eyepieces parfocal for more efficient observing.
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 2" Narrowband NBPF Hydrogen-a 12nm Filter - Enhances The Contrast Between Object and Sky - Allows You to Take Images Even Under Urban Skies
SAR 725
Alstar 12.5mm Illuminated Reticle Plossl Telescope Eyepiece - for Perfectly Guided astrophotos
SAR 162
Alstar 1.25" 17mm Plossl Telescope Eyepiece - 4-Element Plossl Design - Threaded for Standard 1.25inch Astronomy Filters
SAR 105
Alstar 9x50 Angled Finder Scope, Black - You Will no Longer Need to Strain Your Neck at Difficult Angles and are Also able to Search for Objects which are not so Easy to find
SAR 397
