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First light with L-Extreme & Redcat (Halo! Halo!)

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#1 SkyfallerTac

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Posted 30 November 2021 - 01:36 PM

These were captured in less than 2 hours each of data at 90 gain (I know, I should be using 120+), -4F with ASI294MC pro using Redcat 51 and the L-Extreme filter installed in the redcat's internal filter slot. 

Uses 10x darks, no flats or biases (I've yet to build a library of those)

 

Stacked in ASIDEEPSTACK with minor saturation and contrast modification. 

 

Not bad for a first light quickie but the halos on the bright stars I don't like... from what I've read it could be a defective filter... or it could be internal reflection of the filter since its 'too far' from the sensor (some state using a filter drawer rather than the redcat's filter slot brings it closer to sensor and that fixed it). 

 

What say you?

 

IC434 Horsehead Nebula  62x120s lights , 10xdarks

 

zrXNpag.jpg

 

 

Rosette Nebula (I think it was just 20x120s lights, with 10 darks)

 

jXUirNU.jpg

 


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#2 Raginar

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Posted 30 November 2021 - 01:56 PM

The bright stars surrounding the flame and horsehead are notorious for this.  It's a struggle for almost any filter.  You could try putting it closer?



#3 pyrasanth

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Posted 30 November 2021 - 02:06 PM

The bright stars surrounding the flame and horsehead are notorious for this.  It's a struggle for almost any filter.  You could try putting it closer?

I would try a change of filter- sadly it seems your filter is not well suited to your optical setup- I know this is easier said than done knowing the considerable investment required. I think there is a brightness tipping point on the LE-enhance when halo's will appear.

 

On my RASA the IDAS NBZ filter shows no halo's even on this region of the sky- it most certainly is a filter issue as the RASA has even more potential to produce halo's than most other systems- the NBZ filter is a game changer and is guaranteed halo free.



#4 wxcloud

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Posted 30 November 2021 - 04:15 PM

I second the idas NBZ filter...

 

AT80EDT with reducer and asi533 two minute subs (though it's definitely not the best data...) I didn't touch the stars...

 

 

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#5 SkyfallerTac

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Posted 01 December 2021 - 07:38 PM

I've set the return of the filter ..not only 'just in case' its defective but also because of the new Antlia 5nm dual band filter being at similar price range. I will be getting a filter sleeve anyway and see if that was causing it. 

 

I would assume the Antlia will be superior to the NBZ filter?



#6 Blackhawk163

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Posted 01 December 2021 - 08:38 PM

I have this issue with my L-extreme as well. When I paired it worth the Rasa it was horrible. Same on the edgehd 925 with hyperstar. The only reason I don't sell it is I'll occasionally take the hyperstar off and shoot with the .7 reducer. The L-extreme doesn't seem to handle fast systems well. I have the idas nbz and it's fantastic.

#7 Ibuprofen200mg

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Posted 01 December 2021 - 09:20 PM

I just wrapped up shooting the Horsehead in HOO, I did not have any halo with a ZWO 7nm Ha filter but it was rather prominent with the ZWO 7nm OIII filter, both shooting at f/4. I guess it may make sense since I would assume Alnitak and Alnilam are brighter towards the blue side of the spectrum the in the deep red. It wasn't anything that couldn't be zapped out in post though. 



#8 licho52

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Posted 01 December 2021 - 09:32 PM

This is normal and well-known for the L-Extreme, along with many other OIII filters.




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