As many celestial objects; such as nebulae; radiate at other wavelengths; a considerable increase in contrast can be achieved by this; The background sky appears darker and all at once; faint details become visible
1.25 inch filter thread; each Alstar Ultra High Contrast Filter is individually inspected and proudly inscribed with the percentage of light transmittance of the O III and H beta emission lines
Can be used at both light polluted and dark sky sites; Blocks the light from mercury and sodium vapour lamps
Wider 58 Degree Field of View: The Alstar 1.25 Inch 58-Degree 7 mm wide angle telescope eyepieceis designed for astronomy enthusiasts; Offering a focal length range of 2.5 mm to 25 mm and a 58-degree wide field of view to capture more celestial details
Standard 1.25 Inch Barrel and Thread: Compatible with any telescope equipped with 1.25 inch focuser and the 1.25 inch female thread can also be connected with 1.25 inch telescope filter or other 1.25 inch telescope accessories; Whether for planetary observation or deepsky exploration this eyepiece delivers sharp and clear images meeting your high standards for stargazing
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 1.25" 2.5mm 58-Degree Planetary Eyepiece for Telescope
SAR 261
Alstar 1.25" 17mm Plossl Telescope Eyepiece - 4-Element Plossl Design - Threaded for Standard 1.25inch Astronomy Filters
SAR 105
Alstar 1.25" 10mm Plossl Telescope Eyepiece - 4-element Plossl Design - Threaded for Standard 1.25inch Astronomy Filters
SAR 89
