7,500+ items available from stock
Best price guarantee
Your partner for astronomy
Filters > Nebulae filters > H-Beta Filters > Astronomik > H-beta CCD > Astronomik Filters H-Beta CCD EOS clip-filter
Product no.: 43807

Filters H-Beta CCD EOS clip-filter

$ 172.00 incl. VAT, plus shipping costs
too expensive?
long-term
Product not available anymore + lead time

Product description

One of the most important obstacles for the exploration of the night sky is the brightening of the night sky by artificial lights, such as streetlights. The night sky is not really dark in the vicinity of towns or cities, which reduces the visibility of objects beyond the Solar System enourmously.

Depending on the type of celestial object, it is possible to increase the contrast dramatically by blocking the annoying artifical light. This H-beta filter uses a characteristic property of the so called emmission nebulae. Those objekcts glow in special colors, the emmission lines. These emmission lines are linked to chemical elements - in this case hydrogen. A H-beta nebula filter blocks all other colors (and thereby nearly all of the artificial light) and only the emmission line of the hydrogen can pass the filter. The result is astonishing: Suddenly nebulae are visible at locations that were completely empty without a filter. In suburban skies for example the Horsehead Nebula is almost invisible with a 300mm telescope. By using this filter you can see the nebula and its structures without any problems. A must-have for every visual observer!

In contrast to purely visual filters, photographic CCD filters have built-in IR-blocking, which prevents the optical problems caused by infrared radiation.

Please note: In principle, all camera lenses can be used with the Clip-Filter - i.e. Canon EF lenses or camera lenses from other third party manufacturers such as Sigma, Tamron, Tokina, Walimex etc. However, the use of clip-filters with Canon EF-S lenses is NOT possible!

Specifications

Capacity


Connection
EOS Clip
Coating of optical system
multiple
Half-value width
120
Transmission
97

General


Series
H-beta CCD

Area of application


Useful for photographs
yes
Anti light-pollution
yes
Supernova remains
yes
Hydrogen nebulae
yes
Visually useful
no

Recommended accessories

Astrophotography (1)

Astronomik Adapter EOS-Clip / M48

$ 26.90*

*All prices include VAT plus shipping costs.

Astronomik Filters H-Beta CCD EOS clip-filter
How do I interpret these transmission curves?

  • the wavelength is plotted in nanometers on the horizontal axis. 400nm corresponds to deep blue, 520nm to green and at 600nm to red
  • transmission, in %, is plotted on the vertical axis
  • visual filters: The gray curve shows the relative sensitivity of the dark adapted human eye at night
  • photographic filters: The gray curve shows the relative sensitivity of a typical CCD sensor
  • orange: the main emission lines which contribute to artificial sky glow, e.g lines from mercury (Hg) and sodium (Na)
  • green: the most important emission lines from nebulae, such as the lines from hydrogen (H-alpha and H-beta) and the lines from oxygen (OIII)

Customer reviews

There are no customer reviews for this product yet.

Compose your own review

Do you have specific questions about your order or products? Please contact our customer service!