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Astronomik

CLS-CCD Filters


  • 9995

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


Description

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 CLS-CCD Filter enhances the contrast between astronomical objects and the background. Due to the wider transmission curve compared to UHC filters, a greater amount of light will pass the filter. Stars will be less dimmed. This filter has been optimized to block as much spurious light as possible and simultaneously provide the best performance for 'useful' light. A good filter for DSLR-, CCD- and film b/w-photography as well as observation of deep-sky-objects with telescopes or photo lenses of all aperture f/3 and above.

Main use

The filter blocks completely emission lines of artificial light sources like streetlights (e.g. sodium- and mercury-vapor) as well as the airglow. All 'important' emission lines as well as the spectral range of the night-adapted eye are beeing passed. The supplementary IR-blocking layer allows the use for DSLR- and Webcams without an integrated IR-block filter.

Other uses

  • Easier resolution of Double Stars.
  • With the EOS-Clip model, photography with DSLR cameras is feasible even unter extreme light-polluting conditions without shifting the white balance.
  • The 1,25" and 2" socket models can be used for observations from light-polluted areas.
  • If you plan to create color images from emission line data, our CLS-CCD filter is a great choice for the Luminance channel

Astronomik CCDSeries Filters offer the world's largest family of products for color, contrast, and line filters for astronomy. Our Quality Statement is quite simple: we make the best filters for astronomy!

With Astronomik CCD Photographic Filters you get highquality filters for each type of out-of-this-world photographic image you are shooting. When we say "photographic'' we think of each type of imaging sensor. Cooled CCD cameras, digital and analog video cameras, Webcams, digital SLRs (DSLRs), and also conventional chemical film are all in our vocabulary. Our Astronomik Photographic Filters are the photographic filters of choice by professionals and leading amateurs worldwide on all sizes of instruments.

Our selection of filters is broad enough to offer you the most suitable filter for almost every instrument and every imaging mission. Whether you are using a small instrument or enormous professional optics, whether you are imaging under the light polluted skies of a large metropolitan area or from atop high mountains, Astronomik has the filter which will provide you with the best results. Period.

Our Photographic filters are optimized for photographic applications so that each object can be recorded with maximum image quality. Our LRGB color filters can reproduce the correct color of emission line nebulae, as well as the correct color of objects with a continuous spectrum objects such as stars, star clusters, galaxies, reflection nebula. (Other manufacturers sell LRGB filter sets which suppress artificial sky illumination and expect you to accept a significant loss in color balance.)

The transmission curves of our emission-line filters are designed for maximum suppression of atmospheric light pollution and sky background which results in maximum contrast gain. In addition, when using the contrast filter CLS CCD the sky background (due to light pollution) will be suppressed and the colors of the object and the stars will be kept accurate. The curves of the transmission filters are optimized for contrast enhancement and color for instruments with an aperture ratio of f/3.8 to f/15. The use of even faster systems is possible, however we recommend a short consultation for some special instructions.

All Astronomik CCD filters are parfocal, no refocusing is necessary after changing filters. 

Alternatives

CLS: For cameras with an integrated IR-filter or for visual observation.

Specifications

Suitability

  • Visual observation (dark skies): Good, to reduce light pollution by mercury-vapour lamps (streetlight)
  • Visual observation (urban skies): Reasonable, an UHC-E or UHC filter is more suitable
  • Film photography: Very good, colour balance is near perfect
  • CCD photography: Very good, optimized rejection of light pollution
  • DSLR photography (original): Good, colour balance shifted but contrast enhanced
  • DSLR photography (astro modified): Very good, colour balance is near perfect
  • DSLR photography (MC modified): Very good, colour balance is near perfect
  • Webcam / Video (Planets): Unsuitable
  • Webcam / Video (Deep Sky): Very good, if light pollution is a big problem

Technical Data

  • 95% transmission at 486nm (H-beta)
  • 95% transmission at 496nm (OIII)
  • 95% transmission at 501nm (OIII)
  • 97% transmission at 656nm (H-alpha)
  • pass from 450 to 520nm and from 640 to 690nm
  • 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

Astronomik CCD Filter Quality Characteristics:

  • Superior Substrate: Astronomik filters consist of a precision polished substrate on which the actual filter, in the form of very thin dichroic layers, is applied. These high quality measures will in no way reduce the performance of your optical train. Contrary to common experience with other manufacturers’ filters, with Astronomik filters stars remain fine needle points of light! (read more...)
  • Coating: Astronomik filters consist of up to 130 layers deposited on top of the completely transparent carrier glass. These layers comprise both the actual filter and an antireflective coating. (more...)
  • Parafocal Filters: All Astronomik CCD Filters are parafocal. When changing filters, the focal point will not change; you will not have to refocus your camera. This is due to the high tolerance and very low thickness of the substrate and coating.(more...)
  • Durability: Astronomik filters are completely scratch resistant, and not sensitive to moisture, dew, or high humidity (touching a dewedup filter will, of course, not destroy it...if it is made by Astronomik!). With others´ filters, after a few years, you quickly notice their filters degrade and are not at their full, new capability. Not so with Astronomik filters which maintain their "brand new" transmission specifications. And, because of Astronomik´s extraordinarily resistant coating technology, our filters come with a 10year warranty. (more...)
  • Comparing Astronomik CCD Photographic Filters to our Visual Filters: Unlike Astronomik Visual Filters which do not require IR blocking, our Astronomik CCD Photographic Filters do include IR blocking filter layers to prevent any problems from Infrared Radiation (IR) when using CCD and chemical photographic devices.

Astronomik filters are highquality accessories for photographic imaging which will significantly expand your imaging opportunities while helping you create beautiful images. After many years of use your Astronomik filters will be an accessory which will be ready to give you the same joy you experienced many years earlier when they were new.

Now that's an investment worth making!

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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