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Saturday, March 8, 2008
Sh2-240, four more hours.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh_AmXE6nwtgis3Htx-fFJShX9C8DG77EEOuGmc4onS0WYSZlk5hB18wRG1XGALWMxrZ_fDWX0DamlpO6OsdsGu-9pmNsvdOm41Zfu8JSC2UNDSaTiP2dqL0Da8GoZS63JKnOPaKC7xUI1Y/s400/11111color%5B1%5D.jpg)
This is a false color image of the Sh2-240.
Image of the object with no stars was added as lighten mode to the Red channel,
under PS.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj297C1q4r1euAMVb_MoRxpGOmFldJRcY5OGtBPffVDaGk0WCkcmzujHIwqQoyFOOhqae3JDfVuoXSdqicpBbmo6RcIygc_xvdlpioDskC07T0cce6VA5c61FQN6lgHJS_1HLZ9GCNIA8uN/s400/Ha.jpg)
h-alpha image.
Inverted version
This is a version with no stars (image processing trick)
to bring out the structure better. This image was used to make a false color image.
This is really difficult target!
I can see effects of light pollution here, even with 7nm H-a
filter. Bad gradients etc...
This time I shooted 4 X 3600s = One hour subs!
My record so far. Longer subs are needed to bring out very
faint structure of this object.
So far there is about 7h exposures, I thin an other 10 hous is needed here.
I'll shoot more when weather allows.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEip6ekvBnUij5HhiNpIeeH-qcaB-7SKAPQ0SzNErNaUXsFoZgFS1a2dVG4Toxgg2rlZsGZJ19_BjV2-5_nKP0XLRU5stO1GPCA9WNqHNCIGDz9sGiZkm46wD1b852uXO-fYcLnGqsF6Dand/s400/Ha+invert.jpg)
Labels:
Canon FD 200mm f2.8 images,
nebula
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