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Home > AT FILTERS
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AT FILTERS
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ASTROTECH BROADBAND FILTER--1.25"
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List Price: $76.00
Our Price: $49.99
Savings: $26.01
(Out of Stock)

TEMPORARILY BACK-ORDERED: EXPECTED FEBRUARY 2013
This 1.25" Astro-Tech broadband filter has a moderately wide 690 Ångstrom FWHM (Full-Width at Half-Maximum transmission) passband for visual use on emission nebulae in slight to moderately light polluted areas.
ASTROTECH UHC FILTER--NARROWBAND--1.25"
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List Price: $90.00
Our Price: $59.99
Savings: $30.01
(Out of Stock)

TEMPORARILY BACK-ORDERED: EXPECTED FEBRUARY 2013
This 1.25" Astro-Tech ultra-high contrast filter has a narrow 250 Ångstrom FWHM (Full-Width at Half-Maximum transmission) passband for visually observing emission nebulae.
ASTROTECH O-III LINE FILTER--1.25"
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List Price: $90.00
Our Price: $59.99
Savings: $30.01
(Out of Stock)

TEMPORARILY BACK-ORDERED: EXPECTED FEBRUARY 2013
The 1.25" Astro-Tech Oxygen III line filter has a very narrow 110 Ångstrom FWHM (Full-Width at Half-Maximum transmission) passband centered on the nebula emission lines of doubly ionized oxygen at 4959Å and 5007Å where most nebulas radiate the strongest.
   
 
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