Ну что еще за "однозначно"?
Вот сравнение разных фильтров
http://www.astrosurf.com/buil/filters/curves.htm#TeleVue%20NebuStarВот немного о фильтре:
I have used most of the UHC/Narrowband filters and in my opinion the
Astronomiks is superior to all the others with the Lumicon UHC and
the Orion Ultrablock tied for 2nd place and exceptionally good
filters BTW. For USA users the Orion Ultrablock realistically
represents the best value for money as it is considerably cheaper
than the others and it is a subjective call as to whether or not it
is just as good as the others. Many experienced observers that have
used all the narrowband filters except the Astronomiks rate the Orion
Ultrablock at the top of the list. Importantly the Ultrablock is only
1/2 the price, albeit now made in China or Korea or somewhere like
that. The Lumicon I believe is made in the USA and the Astronomiks is
made in Germany. I have yet to find anyone that has used the
Astronomiks UHC that does not rate it as the best UHC available.
The Astronomiks is extremely well constructed mechanically, the glass
used is extremely hard and highly polished making the external
surfaces very durable, it has an unconditional 5 year replacement
guarantee, they would not give that if they thought you could scratch
it easily. The other filters have a finite lifespan, the Lumicon
after a number of years absorbs moisture between the glass layers and
the filter material can become a little spotty, they are generally
accepted to last about 8 to 10 years. I believe that the Astronomiks
may last longer than this but of course this is yet to be tested as
it has only become available in Australia and USA fairly recently.
Optically the differences are not mind blowing but they are apparent.
I have never had them all side by side in the same scope so a lot of
my evaluation is from memory. To me the Astronomiks allows a little
more detail to be picked up than the others and importantly it does
not darken the surrounding background objects quite as much as the
others. It is very good on Emission Nebula incorporating clusters,
like M8, M20, M42 and NGC2239 because it increases the contrast of
the nebula significantly, while leaving the stars of the incorporated
clusters clearly visible. I have now owned the Astronomiks for about
6 months and I have given the filter a good try on the following
objects:-
"Однозначно" или нет - решать только вам.
У меня есть Astronomik UHC и сделан он действительно очень хорошо. Лучше, чем Baader. Но я не очень опытный наблюдатель и сказать о его потребительских качествах не могу
