The Astronomik CLS CCD is suitable under light-polluted skies for
DSLR Cameras, which have been remodeled for astronomical use. The
filter enhances the contrast between all deep-sky objects and the
background.
The Astronomik CLS is our inexpensive solution for the visual
deep-sky observation, b&w photography and CCD observation. The
Astronomik CLS filter is the right filter to gain the contrast of
nearly all objects under light-polluted skies with all sizes of
telescopes. Due to the design of the transmission curve the filter
reduces the sky background and gas nebulae planetary nebulae as well
as open clusters, globular clusters and galaxies are seen better. The
Astronomik CLS blocks the emission of Hg and Na streetlights as well
as all Skyglow-lines . All major emission lines from deep-sky objects
are passed without suppression. As you can see from the chart below
the most important part of the eye's night-sensitive region is passed
with maximum transmission.
The Astronomik H-alpha filter is a narrow band filter for CCD
photography. The filter lets the H-alpha light of emission nebulae
pass and blocks nearly the whole remainder of the spectrum where the
CCD is sensitive.
The full width at half-maximum (FWHM) of 12nm is optimized for
the use with common CCD cameras and allows the use of very fast
optics. It should be noted that the filter has a transmission of up
to 99%.
Another advantage of the 12nm filters is the availability of
guiding stars for cameras with a built-in-autoguider (SBIG). If you
use a very strong filter like our 6nm filter you often won’t
find a usable guidestar.
The range of application extends from 1:2.8 to 1:15. Transmission
losses and chromatic distortions, which arise with other filters,
only occur with Astronomik filters when extremely bright aperture
ratios of 1:2 and more come into play.
The Astronomik 6nm H-alpha filter is an extremely narrow
emission-line filter for CCD photography. The filter lets the H-alpha
light of emission nebulae pass and blocks nearly the whole remainder
of the spectrum where the CCD is sensitive.
The full width at half-maximum (FWHM) of 6nm is optimized for a
maximum contrast between the (H-alpha emitting) object and the
background. The contrast gain is much higher than with our 12nm
emission line filters but you won’t see as much stars in the
resulting images.
The design of the transmission curve makes it possible to use the
filters with instruments from 1:3.75 to 1:15. Selected filters for
faster system are available upon special request.
The Astronomik 6nm H-Alpha filter is offered in three qualities:
B, A and A+. Filters with a maximum transmission of 80%-85% are class
B, 85%-90% are class A, and filters with a transmission of more than
90% are class A+.
All transmission curves of the 6nm filter are measured
individually. Because of this procedure you can get the optimum
filter for your telescope: If you place a direct order please specify
the focal ratio of your instrument and we will select the best filter
for your setup. So you may get the best filter without paying for an
A+ filter.
The Astronomik H-beta filter is a narrow band emission-line filter
for CCD photography. The filter lets the H-beta light of emission
nebulae pass and blocks nearly the whole remainder of the spectrum
where the CCD is sensitive.
The Astronomik H-beta is a filter for visual observation, in
particular with instruments of larger aperture.
It lets the light of the H-beta emission line pass nearly
unhindered and blocks the remaining spectral range to the extent that
the eye is dark adapted. By the use of the Astronomik H-beta filter,
the contrast is increased so strongly, that even the observation of
the Horse Head Nebulae with telescopes of 10" - 12" reaches the realm
of the possible.
The Astronomik UV-IR Blocker lets the full range of sensitivity of the human eye (according to DIN 5031)
pass, and blocks all other parts of the spectrum in the UV and IR. The Astronomik UV-IR Blocker is the
ideal choice as a luminance filter for any kind of digital photography.
Because of the perfect blocking of UV and IR all optical problems in these parts of the spectrum are
avoided.
The filter is optimized for systems with focal ratios between f/0.5 and f/50. The typical transmission
is higher than 99%.
The transmission curves of the Astronomik RGB filters are optimized
for the CCD-astronomy: With these filter-set, we finally can offer
filters that make color proof pictures of all objects possible.
Continuum radiators like stars and galaxies as well as objects that
shine only in single lines (e.g. planetary nebulae), are reproduced
in their true colors. Because of the design of the band pass of the
filters, the color sensitivity of the human eye is optimal
reproduced. You get CCD- pictures, that show the object optimal in
his colors, just as if you would see it, if your eye would be
sensitive enough.
The Astronomik OIII CCD filter is a narrow band
emission-line-filter for CCD photography. The filter lets the light
of double ionized Oxygen of emission nebulae pass and blocks nearly
the whole remainder of the spectrum where the CCD is sensitive.
From the start, the Astronomik OIII filter has been very
specifically designed for the visual observation of gaseous and
planetary nebulae. The extremely narrow pass band of the two OIII
lines brings a substantial contrast gain to these lines even under
best observation conditions. On faint super nova remnants and faint
planetary nebulae the Astronomik OIII filter will often make the
difference as to whether the object can bee seen or not!
The OWB filter would usually not be designated as an
"astronomical" filter. The intention is to enable converted DSLR
cameras (without inbuilt IR-filter) in order to be used for
'terrestrial' photography.
These new filters serve particularly the needs of the digital
photographer imaging the solar system with electronic cameras or
Webcams (with IR-block filter removed) at long-focus telescopes.
The Astronomik SII-CCD filter is a narrow-band-filter for CCD
photography.The filter lets the light of the ionized sulfur (SII)
pass, and blocks nearly the whole remainder of the visual spectrum as
well as IR, in which the CCD is sensitive.
The Astronomik UHC-E filter is our budget filter for deep-sky
observation of emission nebulae and comets under light polluted
skies. It’s particularly suitable for small ’scopes.
The Astronomik UHC is THE filter for visual observing.
You will enjoy using your Astronomik UHC filter because you will
see more stars and more details in deep-sky-objects compared to using
filters from all other manufacturers.
$ 48.95 $ 66.33 Reg.$ 79.95 SAVE $ 13.62 SAVE $ 31.00
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Denk Hi Def Filters
The 'Square' Transmission Curves of our Denkmeier Hi Def Filters that are illustrated above mean that
only the photons in the desired emmission bandpasses of the observed object are contributing to the
view. Therefore, red halos around stars will not be present. A more natural and contrasty view is the
result. Our Hi Def Filters are made to exacting standards through a coating technology known as Ion Beam
Sputtering (IBS). These filters are made on site at the Spectrum Thin Films Facility in NY with state of
the art coating chambers. Our filter glass is polished to better than Lambda/8 and coated with our best
anti-reflective dielectric material for less than 0.25% reflection. Note the amazing 98%+ transmission
percentages illustrated in the light curve profiles at the intended bandpasses of these filters.
Premium multi-layer interference filters, the finest obtainable. Use
broadband ("B") filters to block most forms of light pollution; use
narrowband ("N") filters in heavily light-polluted areas for for
extremely high-contrast observing of faint nebulae.
Premium multi-layer interference filters, the finest obtainable. Use
broadband ("B") filters to block most forms of light pollution; use
narrowband ("N") filters in heavily light-polluted areas for for
extremely high-contrast observing of faint nebulae.
Observe diffuse emission and planetary nebulae as you never thought
possible! Exclusive Meade 60-layer interference coating technology
isolates the 496nm and 501nm O-III lines to tremendously enhance
observable nebular structural detail in all telescopes.
Bandmate™ filters yield bright, sharp and contrasty images - even in the optically sensitive
position in front of the diagonal. Optical glass and red filtering allows for sharp and bright views of
nebulae with embedded star clusters - such as the Lagoon Nebula (M8).
Bandmate™ filters yield bright, sharp and contrasty images - even in the optically sensitive
position in front of the diagonal. Optical glass and red filtering allows for sharp and bright views of
nebulae with embedded star clusters - such as the Lagoon Nebula (M8).
Bandmate™ filters yield bright, sharp and contrasty images - even in the optically sensitive
position in front of the diagonal. Optical glass and red filtering allows for sharp and bright views of
nebulae with embedded star clusters - such as the Lagoon Nebula (M8).
For slight to moderately light-polluted areas.
Enhance your deep sky viewing with the latest in multi-layer coating
technology. Over three years in development. Our filters transmit
desired wave-lengths in a very steep slope vs. gentle transition
slopes in competitive brands. This means better contrast and overall
performance.
For Horsehead, California nebula and other faint nebulae.
Enhance your deep sky viewing with the latest in multi-layer coating
technology. Over three years in development. Our filters transmit
desired wave-lengths in a very steep slope vs. gentle transition
slopes in competitive brands. This means better contrast and overall
performance.
For heavily light polluted areas.
Enhance your deep sky viewing with the latest in multi-layer coating
technology. Over three years in development. Our filters transmit
desired wave-lengths in a very steep slope vs. gentle transition
slopes in competitive brands. This means better contrast and overall
performance.
For diffuse and planetary nebulae
Enhance your deep sky viewing with the latest in multi-layer coating
technology. Over three years in development. Our filters transmit
desired wave-lengths in a very steep slope vs. gentle transition
slopes in competitive brands. This means better contrast and overall
performance.
