Using filters with colour camera

[PKay (Peter)]

Hi Brains Trust

I recently purchased the ZWOASI1600MC-C
I had decided I was not going to complicate my learning by using filters ie: one step at a time.

However, in the future, can I use Ha, SII or OIII filters with a colour camera?

[multiweb (Marc)]

Originally Posted by PKay

Hi Brains Trust

I recently purchased the ZWOASI1600MC-C
I had decided I was not going to complicate my learning by using filters ie: one step at a time.

However, in the future, can I use Ha, SII or OIII filters with a colour camera?

Yes you can use an OSC to do narrow band. You just capture the Ha & Sii in the red channel and Oiii in the combined green and blue channel. Be aware that you will lose sensitivity as well as resolution as you record 1 pixel in 4 for the same surface area because of the bayer matrix.

[blink138 (Pat)]

Originally Posted by multiweb

Yes you can use an OSC to do narrow band. You just capture the Ha & Sii in the red channel and Oiii in the combined green and blue channel. Be aware that you will lose sensitivity as well as resolution as you record 1 pixel in 4 for the same surface area because of the bayer matrix.

hi mark and pkay
apologies if this is remotely considered a hijack, but mark if i use an NB Ha filter on my dslr or my OSC, do i expose normally as a coloured light frame? / how do we assign a red channel to it? before exposure or after (in DSS?)
i have been wondering for a long time and dr google has not helped me!
apologies pkay!
pat

[multiweb (Marc)]

Originally Posted by blink138

hi mark and pkay
apologies if this is remotely considered a hijack, but mark if i use an NB Ha filter on my dslr or my OSC, do i expose normally as a coloured light frame? / how do we assign a red channel to it? before exposure or after (in DSS?)
i have been wondering for a long time and dr google has not helped me!
apologies pkay!
pat

You image exactly as you would image color. When you debayer to R, G and B you keep only the red channel for a Ha/Sii filter and the green/blue combined for an Oiii filter. Then you stack your subs as you would for a mono.

[blink138 (Pat)]

ah thanks marc
pat

[rustigsmed (Russell)]

yep you sure can

Ha
https://www.flickr.com/photos/803366...blic/lightbox/

O3
https://www.flickr.com/photos/803366...posted-public/