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Astronomik

Blue Type 2c Filters


  • 7995

This item is out of stock but you can place an order now and we’ll ship when it becomes available.


Description

The transmission properties of the L-RGB Typ 2c filters are optimized for CCD astrophotography. The set allows to take images in correct colour for all types of objects. Where other brands make strange compromises, we do the best colour reproduction possible. Both stars as well as objects that emit only in spectral lines, are reproduced in their true colors. You get CCD images with perfect colors, as if the objects where bright enough to be seen with photopic vision. This feature is the main difference between Astronomik filters an those of other manufacturers.

The following aspects have been most important for the design of our filterset:

- simple image processing for the user

- highest transmission (nearly 100%) for short exposure times 

- adjusted transmissions of the individual filters for optimal colour reproduction

- the use of industry standards

Astronomik doesn't stop thinking at the step of taking the picture. More important a tool should be given to the astrophotographers that offers a simple and elegant editing process. To maintain the colour, we calculated our filterset for the sRGB color space, that is used as an industry standard from most manufacturers of monitors, printers and imaging software. As a user you do not need to spend time to learn about colourimetry and colour spaces. We have solved the special problems of astrophotography for you.

Due to the high-precision machining of the carrier substrate, our filters are parfocal with wedge errors below all usual margins. In order not to be the bottleneck in a high-quality optical system Astronomik filters are of course diffraction limited. Issues concerning focal distances as well as the exact location of the images of each colour image are not a problem at all!

Specifications

Suitability

  • Visual observation (dark skies): Good, used as colour filter for planetary observations
  • Visual observation (urban skies): Good, used as colour filter for planetary observations
  • Film photography: Unsuitable
  • CCD photography: Very good, excellent colour separation with RGB and L-RGB pics
  • DSLR photography (original): Unsuitable
  • DSLR photography (astro modified): Unsuitable
  • DSLR photography (MC modified): Unsuitable
  • Webcam / Video (Planets): Good, used as colour filter for imaging planets
  • Webcam / Video (Deep Sky): Good, used as colour filter for imaging planets

Technical Data

  • Parfocal with other Astronomik filters
  • Glass thickness: 1mm
  • Completely resistant against high humidity, scratches and aging effects
  • Diffraction limited, the filter will not reduce the optical performance of your telescope!
  • Astronomik filters are delivered in a high-quality, long lasting, filter box
  • Since 2008 we do ship filters with a completely new design. Any kind of halo or strange reflection is a matter of past

    The table gives you a short Overview about the suitability of our filters for various applications:

    Filter/Ability

    Visual dark skies

    Visual urban

    Film

    CCD

    DSLR (Original)

    DSLR (Modified)

    DSLR (MC)

    Webcam/ Video (Planets)

    Webcam/ Video (Deep Sky)

    OIII CCD – 12nm

    ++

    ++

    -

    ++

    ++

    ++

    ++

    --

    0

    Hβ CCD

    ++

    --

    -

    ++

    ++

    ++

    ++

    --

    --

    Hα - 12nm

    --

    --

    0

    ++

    +

    ++

    ++

    --

    +

    Hα - 6nm

    --

    --

    --

    ++

    +

    ++

    ++

    --

    --

    OWB  CCD Type 2

    --

    --

    --

    --

    --

    ++

    ++

    --

    --

    CLS CCD

    +

    0

    ++

    ++

    ++

    ++

    ++

    --

    ++

    Pro-Planet IR 742

    --

    --

    -

    0

    --

    --

    ++

    ++

    ++

    Pro-Planet IR 807

    --

    --

    --

    0

    --

    --

    +

    ++

    ++

    IR-Black

    -

    -

    -

    ++

    -

    -

    ++

    ++

    ++

    UV-IR-Block

    -

    -

    -

    ++

    -

    -

    ++

    ++

    ++

    LRGB Type 2C

    +

    +

    --

    ++

    --

    --

    --

    +

    +

    MC Klarglass - 12nm0

    0

    0

    0

    +

    0

    0

    0

    0

    0

    SII CCD

    --

    --

    -

    ++

    --

    ++

    ++

    --

    --

    Legend:

    ++        The filter is excellent for this application, the dramatic better image!

    +          The filter is good for this application, the much better image!

    0          The filter is suitable for this application, the slightly better image!

    -           The filter is usable for this application.

    --          The filter is not suitable for this application


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