NGC 3372 in Tri-Color

[ejcruz (Eddie)]

I wanted to see what the QHY8 can do with narrow band filters namely Ha, Oiii, and Sii, so I ended up with Baadar Ha7nm, Sii8nm, and Oiii8.5nm, also wanted to learn more about tri-color. Over the last 3-4 nights looked good to try them, so I lined up on ETA and would like to share the results.

The setup:
OTA: WO FLT110 f7
Mount: HEQ5 Pro
Cam: QHY8 (Neb2)
Guide Cam: QHY5 (PHD)
Cam Temp: ~22C
Process: IP 3.75
All capture:
Ha = 1h 20m
Sii = 7h 40m
Oiii = 1h 20m

The following is my attempt using various combination, had to crop because the framing didn't line up:
1) Using L=Ha R=Ha G=Oiii B=Oiii
http://mywebsite.bigpond.net.au/ejcr...BOiii-Crop.JPG
2) Using L=Ha R=Sii G=Ha B=Oiii
http://mywebsite.bigpond.net.au/ejcr...BOiii_Crop.JPG
3) Using L=Ha R=Ha G=Oiii B=Sii
http://mywebsite.bigpond.net.au/ejcr...iBSii_Crop.JPG
4) Using L=Ha R=Oiii G=Ha B=Sii
http://mywebsite.bigpond.net.au/ejcr...aBSii_Crop.JPG

I hope the above will be helpful to others who are thinking tri-color.

Please fill free to advise as I'm always looking to improve.

Cheers
Eddie

[troypiggo (Troy)]

Very nice clarity. I like the first one. Some of the others seem to be oversharpened? The stars look like it in 2) ? Or maybe it's just me.

[multiweb (Marc)]

Wow Eddie. That's awesome. I like the first one but they're all excellent. I'm getting SII and OIII too this week. It's in snail mail right now can't wait

[strongmanmike (Michael)]

Well Eddie they are all excellent really...hard to choose a favourite actually.

I have recently acquired narrow band filters too and hope to have a go with'em this weekend for the first time, if I end up with images as good looking as yours I will be very satisfied .

Would be good to see your images at a larger size though.

Mike

[peter_4059 (Peter)]

Eddie,

A great set of images - I also like the first one best - it would be great to see a true colour one for comparison.

[ejcruz (Eddie)]

Thank you for the advise, I'll go easy on the sharpening next time round.

Marc the Sii was very weak on the ETA, Ha and Oiii had really good s/n.

Strongmanmike looking forward to your results.

Peter_4059 I'm all setup to capture RGB tonight, but it looks like the clouds are rolling in.

Cheers
Eddie

[AlexN]

Eddie, I love the SHO shot! Fantastic !

[allan gould]

Great shots. Great COLOUR and its amazing what the QHY8 can do in narrow band imaging.

[telecasterguru (Frank)]

Eddie,
Most interesting how they are all different yet not different. Amazing.
Frank

[bluescope]

Number one stands out for me ... very 3D look and subdued stars ... ofcourse nice scope as well Eddie

[jase (Jason)]

Good job at the different palette types Eddie. Never really been keen on the CFHT (HOS) palette, but your Hubble (SHO) palette looks great. Probably a little too green given its a strong Ha target, perhaps back it off a little to bring more of the OIII through. Really nice details in all renditions. Well done.

[ejcruz (Eddie)]

Thank you for the advise Jase much appreciated, yes the Ha SN is much better then Oiii and Sii.

Cheers
Eddie

[pgc hunter]

number 1 and 4 do it for me!

[atalas]

Nice work Eddie.