Seagull Nebula in 3nm NII

[avandonk]

Managed to collect six frames for sixteen minutes each in 3nm NII before dawn. I am surprised at all the detail I have never seen before.

Large full res. image FoV 3.5 X 3.5 degrees. 6MB

http://d1355990.i49.quadrahosting.co..._11/SG_NII.jpg


Bert

Astrograph is an Officina Stellare RH200 which has a focal length of 600mm and is F3, yes F3! Clear aperture is 200mm.
FLI Atlas Focuser.
FLI ten position filter wheel CFW-3-10 with 50mm square filters.
Astrodon E series LRGB and HA, NII, SII and OIII 3nm NB filters. Also a continuum filter 5nm.
Camera is a FLI PL16803 which has a sensor size 36.8 X 36.8 mm.
The FoV of this system is 3.5 X 3.5 degrees.
Mount is a Software Bisque PMX.

[prokyon (Werner Probst)]

Very nice, so many details, an amazing object.

Werner

[dvj (John)]

Fabulous. Such a short exposure. I can only imaging what my 40 minute subs are going to look like. OS finally got me my camera adapter for the RH after waiting 8 weeks. Now the collimation and array squaring fun begins.

[Larryp (Laurie)]

That is superb, Bert! So much detail.

[strongmanmike (Michael)]

Geeeeez Bert, too right about the detail never seen before! me neither! and in NII as well ...this little pocket rocket scope is starting to come into its own now

Mike

[multiweb (Marc)]

Far out! That's deep. Never seen that before either. Very cool.

[avandonk]

Here is the zipped corrected stacked fit file if you want to try to extract more information yourself. 13MB

http://d1355990.i49.quadrahosting.co...RZ_SG_NII_.zip

Bert

[avandonk]

Originally Posted by prokyon

Very nice, so many details, an amazing object.

Werner

It did surprise me I can assure you.

Originally Posted by dvj

Fabulous. Such a short exposure. I can only imaging what my 40 minute subs are going to look like. OS finally got me my camera adapter for the RH after waiting 8 weeks. Now the collimation and array squaring fun begins.

John you are a greedy person 40 minutes indeed. Just do not touch the factory collimation and alignment until you are sure you have to.

Originally Posted by Larryp

That is superb, Bert! So much detail.

Thanks Larry

Originally Posted by strongmanmike

Geeeeez Bert, too right about the detail never seen before! me neither! and in NII as well ...this little pocket rocket scope is starting to come into its own now

Mike

It could be that all the hard work is finally paying off Mike. This night was the first night it was clear from dusk to dawn since I have had the new system. This image was just a fill in for the last hour. I have also found that with 3nm NB filters you can happily image a good half hour or more into twilight after astro dark.

Originally Posted by multiweb

Far out! That's deep. Never seen that before either. Very cool.

It did really surprise me too Marc

Bert

[naskies (Dave)]

Nice one, Bert. I see you've been capturing lots of NII data recently. Have you tried to combine it against H-a data for false colour mapped images?

[avandonk]

Originally Posted by naskies

Nice one, Bert. I see you've been capturing lots of NII data recently. Have you tried to combine it against H-a data for false colour mapped images?

Most objects are about 50:50 NII:HA. The only way to tell is to image. The NII data seems to have more detail than the HA.

Here is M16 with the red channel NII and green HA 8MB


Red and green in additive colour is yellow!


http://d1355990.i49.quadrahosting.co..._HA_G_M16+.jpg


Bert