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Old 10-09-2019, 02:35 PM
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Merlin66 (Ken)
Spectroscopy Wizard

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Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 6,965
Baader quality ND filters

Thinking of using a quality ND filter? Maybe a home made Herschel wedge?
I have two, as new in boxes
Baader,1 1/4",1.8 ND #2458345
Baader,1 1/4",3.0 ND #2458346 ****sale Pending****

Purchased for a project which didn't go ahead....

Asking $50 each plus post.....

Last edited by Merlin66; 10-09-2019 at 06:37 PM.
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Old 10-09-2019, 03:37 PM
Martin_S
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Location: Wellington Point , SE, QLD ,Australia
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Pm sent Re 3.0 ND filter
  #3  
Old 11-09-2019, 02:36 PM
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Merlin66 (Ken)
Spectroscopy Wizard

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Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 6,965
The ND 1.8 is a great option to add to a Herschel wedge (especially when used with a Continuum filter) for solar white light imaging.
Allows shorter exposures, faster frame rates - cutting through the seeing....
NOT recommended for visual solar observing.
 

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