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Line filters vs tri/quad band filters

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#1 stars n planets

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Posted 19 January 2021 - 02:08 PM

Hi

Would the Ha collect from a 12nm Ha only filter be better than any Ha collected by a tri/quad filter that collects O and S data?

#2 bobzeq25

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Posted 19 January 2021 - 02:22 PM

Easiest question ever.

 

The line filters are designed to work with mono cameras, the tri/quad band are designed to work with one shot color.  That is the determining factor.

 

Using line filters with OSC, or tri/quad band with mono, is a bad idea.  It can work some, but it's still a bad idea.  Inefficient use of each.

 

Mono plus line filters is better than OSC with tri/quad band.  But more expensive.  That's an easy determination, also.  And a personal decision, containing no cosmic truth.


Edited by bobzeq25, 19 January 2021 - 02:25 PM.

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#3 stars n planets

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Posted 19 January 2021 - 02:44 PM

Easiest question ever.

The line filters are designed to work with mono cameras, the tri/quad band are designed to work with one shot color. That is the determining factor.

Using line filters with OSC, or tri/quad band with mono, is a bad idea. It can work some, but it's still a bad idea. Inefficient use of each.

Mono plus line filters is better than OSC with tri/quad band. But more expensive. That's an easy determination, also. And a personal decision, containing no cosmic truth.

I guess my question was wrong­čść . if i use a osc camera, would i get better Ha data from a tri/quad band filter or a dedicated Ha filter? The multiband would multiple layers so not?

Edited by stars n planets, 19 January 2021 - 02:46 PM.


#4 t-ara-fan

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Posted 20 January 2021 - 03:10 PM

See my comment (#7) here: https://www.cloudyni...s2-filter-data/

 

There is crosstalk between all the bands with a tri/quad band filter.   The Ha is effected the least because the other elements are fainter than Hydrogen. But S-II gets massive crosstalk from Ha so that isn't good.



#5 bobzeq25

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Posted 20 January 2021 - 06:32 PM

I guess my question was wrong . if i use a osc camera, would i get better Ha data from a tri/quad band filter or a dedicated Ha filter? The multiband would multiple layers so not?

I suppose it depends on exactly:

 

what the target is

 

what your setup is

 

what you're trying to do.




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