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Photo

The Horsehead with a Baader Ultra-Narrowband H-alpha 3.5nm filter

astrophotography filters imaging
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#1 ClownFish

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Posted 21 January 2021 - 11:17 AM

I finally had a chance to test the Baader Ultra-Narrowband H-alpha 3.5nm filter on a night of exceptional seeing.  I captured this image with my C11 EdgeHD at f/7 on an iOptron CEM120 EC2 mount.  Total RMS was 0.24 arc seconds during the 40 180-second exposures with an ASI 1600Mm Pro at -10c.  30 darks, but no flats or bias.

 

Horse-cn.jpg

 

Horse2-closeup-CN.jpg

 

 

 


  • peleuba, BRCoz, Neptune and 16 others like this

#2 Berny

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Posted 21 January 2021 - 11:41 AM

Great picture.

Here is an interesting article about Ultra-Narrowband Filters.   

https://www.baader-p...and-filter-why/



#3 Older Padawan

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Posted 21 January 2021 - 11:46 AM

Great picture of an incredible object




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