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Optical Filter Astronomy 394NB4 CaK filter 1. 25" Eyepiece

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Optical-Filter-Astronomy-394NB4-CaK-filter-1-25-Eyepiece
Item Sold
Item condition:
New
Ended:
Aug 20, 2012 20:49:09 PDT
Price:
US $160.00
[
History:
6 sold
 ]
Shipping:
$5.00 Standard Shipping | See details
Item location:
Brattleboro, Vt., United States
Seller:

Description

Item number:
150811106688
Seller assumes all responsibility for this listing.
Last updated on  May 21, 2012 09:04:45 PDT  View all revisions

Item specifics

Condition:
New: A brand-new, unused, unopened, undamaged item (including handmade items). See the seller's listing for full details. See all condition definitions- opens in a new window or tab ... Read moreabout the condition
 

BJOMEJAG EBUYER STORE

Visit my eBay store  BJOMEJAG EBUYER STORE
FAQs Regarding Filter Use
Photonic Equipment
Fluorescence Emission
Fluorescence Excitation
Alpha Technology Filters

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A Precision Interference Filter for  EBAY Astronomers that selectively passes the 394 nm CaK. This filter is intended for solar flare photography, Specifically produced for EBAY customers fom NOS OEM customers.

The filter comes as a single component, mounted in a standard 28mm or 1.25" Eyepiece ring.

See the attached photos thanks to John Paladini. 

6 inch  B+W video stack 80 393 caK
notice arching spray in one of sunspots

Specifications follow:

Central Pass Wavelengths 394nm, when aligned and tuned for maximum contrast.

The filter is a narrow passband at 394, integrated with highly attenuating filters to remove longer wavelength light to 10e++7. Primary Pass bands and blocking filter in series allow typical 10% to 20% transmission of the CaK band.

Background attenuation OD 7+, UV to 1500nm

Size; 25mm in 18mm (1 1/4') eyepiece holder.

Filter supplied with actual spectral data.

If you don't find your need, try a wild card search. Go to my BJOMEJAG EBUYER STORE and add an * or so to the description, to get close matches.

For a most comprehensive assortment of filter solutions, follow the link at my store, under "Technical Data" to the Omega 'Build A Filter' tool. Millions of potential matches are available. Prices are very reasonable if you indicate "cosmetic seconds acceptable".


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On May-07-12 at 04:53:52 PDT, seller added the following information:

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