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Is this Antlia 4.5nm Ha filter useable?

Astrophotography
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#1 jesse 3

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Posted 17 June 2024 - 05:42 PM

From the included test report, the band is severely off center, in the wrong direction. Should I contact Agena Astro and request an exchange?

44fe25a461db29f0c62e0809414d34e3.jpg

#2 t-ara-fan

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Posted 17 June 2024 - 06:18 PM

 in the wrong direction. 

 

By that do you mean if you run it in a fast system then the  % light transmission will drop?

 

If this is the Antlia 4.5nm EDGE filter, they show (below) the centerline at 657nm. I believe that is a good place for the centerline in high speed optical systems.  And yes I would send it back.

 

Antlia edge 4.5nm ABUIABACGAAgo5SZkQYonP3zmgYwwQo4gQY.jpg
 



#3 jesse 3

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Posted 20 June 2024 - 06:54 AM

Antlia agreed to hand pick a filter and ship it to Agena for me to pick up. I am satisfied that both Antlia and Agena are responsive to my request.

#4 tosjduenfs

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Posted 20 June 2024 - 12:35 PM

Out of curiosity. In your sample of the Antlia Edge Ha filter, is one side silver and the other side deep red?



#5 jesse 3

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Posted 20 June 2024 - 01:12 PM

Out of curiosity. In your sample of the Antlia Edge Ha filter, is one side silver and the other side deep red?


Yes. Bottom side is deep red. I should have looked at test report before opening the envelope. It would make return much easier.
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