Astronomik H-Beta 12nm CCD EOS Clip 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 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 better availability of guiding stars for cameras with a built-in-autoguider (SBIG). If you use a very strong filter like our H-alpha 6nm filter you often won’t find a usable guidestar.

Together with the other three Astronomik emission-line filters you can do great color images even from very light polluted places!

The filter has a built-in IR-blocker up to 1150nm. You don’t need an additional IR-blocker with this filter.
Main use
The Astronomik H-beta-CCD increases the contrast between objects, in this case between the H-beta emission line and the skyglow background. Our Astronomik H-beta-CCD completely suppresses the emission lines of artificial lighting (mercury (Hg) and sodium (Na)) and skyglow. The optimal aperture ratio for this filter is 1:3.5 to 1:6. 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.
Other uses
When using the Astronomik H-beta CCD filter together with the H-alpha CCD, OIII-CCD and the SII-CCD filters you can obtain three-color images of emission line objects (gas nebulae) from locations with very strong light pollution. To do so, you would take an image in three different wavelengths, select each one as a color-channel in Photoshop and paste them together as a color image.
When using the Astronomik H-beta filter together with the H-alpha-CCD you can create charts of the ionization energy in nebulas by creating an image from the ratio of H-alpha vs. H-beta.
If you plan to create color images from emission line data, our CLS-CCD filter is a great choice for the Luminance channel
The H-beta-CCD is also great for visual observation. If you plan to get filters for visual observation and for astrophotography get the CCD filter: You may use this filter visual as well as in front of you camera. The built-in IR-blocker doesn’t disturb visual observation but you need an additional IR-blocker if you want to use the visual filer with your camera.

Suitability
Visual observation (dark skies): Very good, but only suitable for a few objects
Visual observation (urban skies): Unsuitable
Film photography: It depends, very long exposure time
CCD photography: Very good, but only suitable for a few objects
DSLR photography (original): Very good, but only suitable for a few objects
DSLR photography (astro modified): Very good, but only suitable for a few objects
DSLR photography (MC modified): Very good, but only suitable for a few objects
Webcam / Video (Planets): Unsuitable
Webcam / Video (Deep Sky): Unsuitable
Technical Data
98% transmission at 486nm (H-beta)
full width at half maximum 12nm
complete blocking from 350nm to 470nm and 500nm to 1100nm
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

Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or sales@rothervalleyoptics.co.uk.

The delivery times for most items is 1 - 2 days but again, please double check stock levels on important orders before placing an order via the website.

The delivery costs for courier next day are for mainland UK only. If you live in the Scottish Highlands/Islands, Channel Islands or Northern Ireland, then a shipping surchage will apply. please contact us for prices. Smaller items can still go 1st class via Royal Mail.

Please note that if you are wanting to take advantage of our Saturday and Sunday timed services or next day pre 12 or pre 10:30 services, you MUST check that the stock is here at the shop before placing orders. Also, orders using the Saturday and Sunday services must be placed before 2pm the previous working day. Also, please remember to check that the stock is here at the shop before placing orders. If the stock is not at the shop, we won't be able to ship on any of the timed services. 

Please note International customers will need to contact us for a shipping price prior to ordering via the website. This all depends on the size and weight of the items. Please get in touch with us for any postage costs. Please note we do NOT ship telescopes or heavy items outside of the UK. This is due to massive postage costs and problems regarding returns.

If you have any questions regarding stock levels or delivery, please get in touch.

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Even if you collect most of your items from our shop, you can still order via the website and select the "shop collection" delivery option. Then you can come to our shop, collect your item and still get your points!

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So happy shopping and if you have any questions about the scheme or any other queries, please get in touch.

Rother Valley Optics

01909774369
sales@rothervalleyoptics.co.uk

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- - - Rother Valley Optics Ltd

01909 774 369
sales@rothervalleyoptics.co.uk