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Askar C1/C2 vs D1/D2 filter set... which one?? [Deep Sky] Acquisition techniques · peng155 · ... · 3 · 296 · 0

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messierman3000 7.22
Oscar
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IMO,

I think it's risky to use any of those with the Hyperstar (besides the IDAS)

the IDAS was especially designed for fast systems

if you want SII, I can only recommend getting an Astronomik MaxFR SII

I may not be remembering if there is a fast FR dual band OIII/SII filter, but if there is, I'm sure someone will point it out

and yes, narrower filters will give you better contrast; the narrower the better
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Alexn 12.25
Alex Nicholas
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D1/D2 are SIGNIFICANTLY better than C1/C2, however, you will get bandpass shift using them on a hyperstar or rasa…

I'm in bortle 5 and the difference between my d1 and the c1 I used to use is wild.
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