SII with a DSLR - Eta @ 300mm f4

[dugnsuz (Doug)]

Hello all,
Received my Astronomik SII 12nm EOS clip-in filter for my 40D today.

Gave it a quick blast on a rapidly disappearing Eta to test it out on something bright - apologies for the softness of the image.

Image details...
90mins (6x15min subs), iso1600
Stretched and sharpened in PS4

This is the red channel - where most/all of the data is.

I didn't expect much from this filter but was pleasantly surprised to see that I'd captured anything at all!!

Higher Res...
http://s327.photobucket.com/albums/k...current=8d.jpg

Question is now do I try to incorporate SII data into my RGB images or just go for widefield Hubble palette grotesques!?


Comments from more experienced NB imagers would be greatly appreciated.
All the best
Doug

[jase (Jason)]

Doug, my hat goes off to you for giving SII imaging a whirl with a DSLR. You do realise however that resistance is futile - that mono chip is not as far away as you think. You're soon going to get tired of replacing the clip, especially if your intent is to perform some narrow and broad band imaging.
A pleasing result none the less. Now I assume you've already replaced the clip with an OIII and Ha filter so you should be able to push out a narrowband result soon right?

[dugnsuz (Doug)]

Originally Posted by jase

Doug, my hat goes off to you for giving SII imaging a whirl with a DSLR. You do realise however that resistance is futile - that mono chip is not as far away as you think. You're soon going to get tired of replacing the clip, especially if your intent is to perform some narrow and broad band imaging.
A pleasing result none the less. Now I assume you've already replaced the clip with an OIII and Ha filter so you should be able to push out a narrowband result soon right?

Cheers jase - you're correct, NB imaging with a DSLR is a chore, but it's the most cost effective way for me to get into it at present. In order to adequately fill the wells (hope that's the right term) I have to image for a minimum of 10-15mins per sub then replace the clip in filter and try to maintain orientation, often over consecutive nights.
All good fun!
I think I'll try the full NB run on something closer to the zenith though - Eta's made a dash for my neighbour's fence by 11pm.
Cheers
Doug

[leon]

Well, who am i to argue, you have advice from the best, I like it Doug.

Leon

[multiweb (Marc)]

Quite amazing the amount of signal you got with a DSLR in Sii. Kudos!

[Bassnut (Fred)]

Most impressive Doug, high contrast and low noise.

SII often gives the lowest signal of the NB frequencies, so thats quite a feat on a DSLR, and 15 min subs, geez, well done.

[dugnsuz (Doug)]

Originally Posted by leon

Well, who am i to argue, you have advice from the best, I like it Doug.

Leon

Cheers leon - and congratulations on the latest little 'leonite'!

Originally Posted by multiweb

Quite amazing the amount of signal you got with a DSLR in Sii. Kudos!

Originally Posted by Bassnut

Most impressive Doug, high contrast and low noise.

SII often gives the lowest signal of the NB frequencies, so thats quite a feat on a DSLR, and 15 min subs, geez, well done.

Thanks Marc & Fred - excuse the pun, but I'm a bit in the dark as to how much or how little signal the SII filter will let through. And, where is the best place to 'map' it to in a RGB blend?

All the signal was in the red channel, so do I blend it with Ha/Red to get a composite Ha/SII Red channel?
Any ideas?? I will experiment of course - but what's your experience?
Cheers for the comments
Doug