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Old 03-05-2020, 03:48 PM
yorkpf (Paul)
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yorkpf is offline
 
Join Date: Oct 2016
Location: Brisbane, Australia
Posts: 18
ZWO Narrowband Filter Set 7nm

ZWO Narrowband Filter Set 7nm
FOR SALE – as new

Narrowband filters do not eliminate the effects of light pollution or increase the object’s brightness. But, in many cases, they increase the contrast between nebula and night sky, not brightening the nebula.

They can reduce the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapor, and both high and low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (ie. skyglow).

This filter set comprises an OIII, an H-alpha and an SII in 7nm bandwidth for imaging in Hubble Palette (OIII 501nm, Ha 656nm, and SII 672nm).

• Thickness is 5.5mm + 2.5mm for the thread
• Size is 1.25 inch
• Original packaging

For more information, see https://astronomy-imaging-camera.com...nd-1-25-filter

Local pickup (Brisbane) preferred but postage, (+ insurance, tracking, if required) at buyer’s expense.

Selling for $517 ONO (retail for $739). Will consider selling filters separately.

Regards
Paul
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Last edited by yorkpf; 11-05-2020 at 12:54 PM.
 

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