About this product
Part Number: 1.25 UHC Filter
Astro Essentials UHC Filter 1.25" / 2"
The narrowband UHC filter, like the O-III filter, isolates the two doubly ionized oxygen lines (496 and 501nm) in addition to the hydrogen-beta line (486nm) emitted by planetary and most emission nebulae.
The UHC filter permits superb views of objects like the Orion, Lagoon, Swan and other extended nebulae. It performs well in smaller aperture instruments owing to its greater light transmission than the O-III, yet still suppresses light pollution well.
The UHC filter is the best all-round dark-sky nebula filter as it offers decent gains on a wider variety of emission nebulae than the more selective OIII Filter
|Average Rating (1 Review): |Astro essentials UHC filter 2inch and O111 filter 2inch
09 September 2023 | Julie
Very useful filters good light contrast and transmission
First Light as always excellent
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