Optical Vision 1.25 Inch Ultra High Contrast (UHC) Filter
Order in the next 8hrs 35mins for delivery on Wednesday, 19 March, when you select next or named working day delivery in the checkout (charges apply).
Free standard delivery (within 2-3 working days) also available - more info
The Sky-Watcher 1.25 Inch Ultra High Contrast (UHC) Filter is the best all-around dark-sky nebula filter. This 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. Supplied with storage case. More
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Learn moreThe Sky-Watcher 1.25 Inch Ultra High Contrast (UHC) Filter is the best all-around dark-sky nebula filter. This 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. Supplied with storage case.
Sky-Watcher 1.25 Inch Ultra High Contrast (UHC) Filter:
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.
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| Effect | Type | Contrast Enhancement |