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Deep Sky UHC deepsky filter for 2" eyepieces
incl. 27% VAT
83.80 €
Including 27% VAT:
83.80 € (33 100 HUF)Net price (for non-EU customers):
65.98 € (26 063 HUF)
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Product code: Duhc2
Deep Sky UHC deepsky filter for 2" eyepieces
More about the product
The UHC filters are general purpose deepsky filters which blocks the light from Hg and Na lamps, but transmits all of important wavelengths, such as H-alpha, H-beta and O-III. UHC filters are available from many different manufacturers, checking the image below might help to choose the right one. As it is evident there is no such thing as UHC "standard". All of the filters transmits most of the light around H-alpha (656nm), Oxigen-III (501nm) and H-beta (485) lines.
There are wider and narrower filters. But what might be the difference between them in practice? It depends on heavily the selected targets.
A general rule is that the narrowed the transmission is the higher the contrast is, meaning that they work excellently for emission, planetary nebulae and supernova remnants. They don't work that well on objects with wider spectrum, like stellar clusters, galaxies, open- and globular clusters. To photograph these a wider transmission, light pollution reduction filters are recommended.
So: for emission and planetary nebulae, and supernova remnant use a narrowband filter, like Astronomik or Castell UHC.
V.Laci's opinion
Have been using it for years
Optical quality
Mechanical quality
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Deep Sky UHC deepsky filter for 2" eyepieces
Pros
2009. december 15-én vásároltam ezt a kiváló terméket. Nem vagyok túlzott szűrő rajongó, mégis ez a filter lenyűgözött képességeivel. 30 mm-es 2\"-os GSO SuperView okulárhoz használom, ezért a hatalmas látómező adta lehetőségekhez igazítom a megfigyeléseimet. Kiterjedt mély-ég objektumokhoz használom. A környező csillagok fényét és a fényszennyezést kiváló eredménnyel csökkenti, az égi hátteret bársonyfeketére varázsolja még 60x-os nagyításnál is. A diffúz ködöknek rendkívüli kontrasztot ad, az M42 szálas szerkezetét annyira jól megjeleníti, hogy szinte rajzolhatatlanná teszi a részletgazdagság miatt. Lenyűgöző szépségében tárja elénk a mélyeget.
Cons
Véleményem szerint nincs hátránya.
Summary
Sokkal többre képes, mint amire számítottam. \"Leesik az állam\" jellegű érzéssel ajándékoz meg. Szívből ajánlom!
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