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Alstar 2" UHC (Ultra High Contrast) Filter - Bundle with - Eyepiece Extension Tube Optical Length 35mm in Saudi Arabia Alstar 2" UHC (Ultra High Contrast) Filter - Bundle with - Eyepiece Extension Tube Optical Length 35mm in Saudi Arabia Alstar 2" UHC (Ultra High Contrast) Filter - Bundle with - Eyepiece Extension Tube Optical Length 35mm in Saudi Arabia Alstar 2" UHC (Ultra High Contrast) Filter - Bundle with - Eyepiece Extension Tube Optical Length 35mm in Saudi Arabia Alstar 2" UHC (Ultra High Contrast) Filter - Bundle with - Eyepiece Extension Tube Optical Length 35mm in Saudi Arabia Alstar 2" UHC (Ultra High Contrast) Filter - Bundle with - Eyepiece Extension Tube Optical Length 35mm in Saudi Arabia Alstar 2" UHC (Ultra High Contrast) Filter - Bundle with - Eyepiece Extension Tube Optical Length 35mm in Saudi Arabia

Alstar 2" UHC (Ultra High Contrast) Filter - Bundle with - Eyepiece Extension Tube Optical Length 35mm

SAR 398
Brand
A ALSTAR
Category
Telescopes
– 1 +

Special Features

  • Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter provide extra focuser back travel sometimes needed to achieve focus with certain eyepiece or telescope combinations. More back travel is often needed for short-range terrestrial viewing or with use of a field flattener, coma corrector, or focal reducer lens. 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
  • Extension tube provides extra focuser: back travel often needed for short range terrestrial viewing through a telescope; or for astrophotographic applications
  • 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
  • 2 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

Description

Alstar 2-Inch Telescope Eyepiece Extension Tube Adapter provide extra focuser back travel sometimes needed to achieve focus with certain eyepiece or telescope combinations. More back travel is often needed for short-range terrestrial viewing or with use of a field flattener, coma corrector, or focal reducer lens. Extension tube provides extra focuser "back travel" often needed for short-range terrestrial viewing through a telescope, or for astrophotographic applications. Fits in 2" telescope focusers, and accepts 2" eyepieces or accessories. Features two locking thumbscrews to secure any inserted astronomy accessory, with a brass compression insh to prevent the marring of your telescope accessories. Machined of high quality aluminum and anodized black, durable for long time use.

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