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Narrowband x Broadband in a doublet refractor

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#1 Andre Moutinho

Andre Moutinho

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Posted 30 June 2020 - 09:27 PM

Hello all,

 

I have noticed that lower band SII filter is located between the Green and Blue band. So I believe that a doublet would have a better performance in Narrowband Ha SII OIII technique compared to LRGB broadband. 

 

Is this correct?

Thanks for looking,

Andre Moutinho



#2 Tayson82

Tayson82

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Posted 01 July 2020 - 05:34 AM

SII (sulfur) behind Ha (hydrogen). 

Do You meen OIII (oxygen)?




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