First Narrowband Colour attempt...sorry it's NGC3372

[JohnH]

Hi,

Sorry for the unoriginal target choice - but I wanted to try my hand at narrowband synthetic colour processing and it is an easy target to go for. I have enjoyed the detail in the Ha shots I have taken but wanted to try for colour and have tried RGB, LRGB and HaRGB. I have had a lot of issues with all of those so I decided to try HaOiii (I do not have an Sii filter - yet) and James Cannistras Bicolour Narrowband technique - basically this maps Ha to Red, Oiii to Blue and synthesyses green. The result is attached. My result is not a good as I had hoped for but it is a start, it was about 30 mins of Oiii and 60 of Ha then the clouds came in...

[multiweb (Marc)]

Nice one John. You got some great details there. So did you do LHaRHaGOiiiBOiii inyour blend or RHa G(Ha+Oiii) BOiii? If you try the first blend you'll get a nice red and blue photo.

[JohnH]

It is RHa, G(HaOiii), BOiii - I will try your suggestion but I think I need more Oiii data...

[TrevorW]

Very unusual but nice what scope and camera ???

[JohnH]

Trevor, it was taken with a North Group 127mm APO refractor with an Opticstar 145m CCD, filters were Astronomics Ha and Oiii, about 30mins Oiii and 60 Ha.

[TrevorW]

So this would be a crop no ?? what does the full field look like

[JohnH]

I wish! That is full field, full res, the chip is the Sony EX HAD ICX285AL - 1360 x 1024 pixels (6.45um) and giving approx 1.4" per pixel in my setup...

[TrevorW]

Wow!!

I was basing my assumption on the fact I've got a 8" scope with a 7.8um pixel CCD and the FOV is way larger

I'll get used to how images should appear based on scope/camera eventually

[Omaroo (Chris Malikoff)]

Aussie, Aussie, Aussie...Oiii, Oiii, Oiii !!!!

Great work - nice image!