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Item:Optical Filter Astronomy Na & Hg Skylight Reject 48mm

Optical Filter Astronomy Na & Hg Skylight Reject 48mm

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4 available
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Price:US $69.99
Shipping:$5.00US Postal Service First Class MailSee more services 

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US Postal Service First Class Mail
5-8 business days
$5.00
*The estimated delivery time is based on the seller's handling time, the shipping service selected, and the payment method selected. Sellers are not responsible for shipping service transit times. Transit times may vary, particularly during peak periods.

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Other item info
Item number:350151139212
Item location:Brattleboro, Vt., United States
Ships to:Worldwide
Payments:
History:6 sold
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A Precision Interference Filter for  EBAY Astronomers that selectively rejects the Sodium (Na) 589.6nm prominance, as well as the Mercury 577 and 436 nm peaks, yet transmits 90% of the OIII and H beta as well as H alpha, and the continuium of visible light between these atomic emissions. Specifically produced for EBAY customers.

The filter is Mounted in a standard 48 mm eye piece ring (2.0 inch).

 

Note: This filter is getting very positive reviews. See attached photos of with and without. John P. says "m16 with and without filter - a huge difference in quality with filter"  Also note the spectrum overlay John provided of the accurately positioned rejection regions that center on the Sodium and Mercury emission that can cause background and loss of contrast. 

 
this filter is better(more value)  for CCD than visual -- but can help for visual also in light polluted skies
each shot is 15 seconds no enhancements )

Pictures and comments thanks to John Paladini.

(better shot of m13  notice better color corection with Nahg filter
 

Specifications follow:

Central Rejection Wavelengths 589 and 436nm (98%), secondary rejection at 577nm.(95%)

Primary Pass bands to pass 450 to 550nm, and 600 to 750 nm with typical 90%.

Size; 48mm eye piece (2.0 inch) threaded filter 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 Aug-31-09 at 17:33:33 PDT, seller added the following information:



00422
Shipping and handling
$1.00 shipping for each additional eligible item you buy from bjomejag.
Item location: Brattleboro, Vt., United States
Shipping to: Worldwide
Quantity:
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Shipping and handling
To
Service
Estimated delivery*
US $5.00
United States
US Postal Service First Class Mail®
5-8 business days
after seller receives cleared payment
*The estimated delivery time is based on the seller's handling time, the shipping service selected, and when the seller receives cleared payment. Sellers are not responsible for shipping service transit times. Transit times may vary, particularly during peak periods.
Domestic handling time
Will usually ship within 3 business days of receiving cleared payment.
Return policy
Item must be returned within
Refund will be given as
Return policy details
7 days after the buyer receives it
Merchandise Credit

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