The Narrow Tarantula

[MGTechDVP]

Hi Everyone.

Just sharing my latest "achievement"... this is the first narrowband image I've taken. After waiting for clouds to clear up and line up with my days off and still struggling with trailing in the main image when guiding, I decided to capture at my modded 300D highest ISO setting, which is ISO3200 (hacked firmware) but limited to only 3 minute subs.

The channels are R:G:B = SII:Ha:OIII and I've used OIII as the luminance.

Subs taken over 3 nights:

SII: 30 (Night 2) + 60 (Night 3) x 180s ISO3200
Ha: 30 (Night 1) + 30 (Night 2) x 180s ISO3200
OIII: 30 (Night 3) x 180s ISO3200

Each channel stacked and dark subtracted in Nebulosity 3 and channels processed & combined in PS.

Im sure that the subs will be sharper when I iron out my trailling (polar alignment issues). Looks like that even short 3 minute subs with slight Polar MIS-alignment is enough to soften the image a bit.

Thanks for looking.

Mariusz

[nebulosity.]

Nice image Mariusz, interesting about using a 300D, has it got cooling? If not how did you manage the noise?

I do my imaging with a very modded 350D, (full spectrum, mono sensor, super cooled) and would love to do some NB :thumbsup:

Have you thought about monoing you 300D? It more than doubles the sensitivity.

Cheers
Jo

[MGTechDVP]

Hi Jo,

Thanks for the compliment. My 300D is not cooled, just full specturm modded and I didn't think about monoing it until now :D
Looks like my weekend project if its cloudy, otherwise I'll be out there imaging.

The noise level was not too bad after stacking and stretching the seperate narrowband images (except the SII, that had a bit of noise), but I did use Noiseware pro on the luminance map (the OIII exposure/stack) after UNsharpening it in PS 100% 3pixel. I guess combined with down scaling the final image it kept the noise levels in check.

I did some research about de-bayering the DSLR, and I'm actually going to give it a go... wish me luck, but if the extreme-hack works, the extra sensitivity and resolution will come in handy.

Cheers,

Mariusz

[nebulosity.]

Awesome :thumbsup: love to hear how it goes, if it's any help you can check out my thread on cooling and monoing my 350D here. (http://www.iceinspace.com.au/forum/showthread.php?t=110554)

If you go to page two thats were I did the monofying, hope it works out well.

Jo