Category Archives: Nebulae

Another DumbBell – Sony IMX224

Dumbbell Nebula – 60 minutes (450×8 sec) at 1241 Gain, RT Sony IMX224, TV-85 at F/5.6, SharpCap 2.9.

I let the camera take sub-images for an hour for this picture.   I used 8 second subs with no darks at a low gain setting of 1241 (100-5000 Range.)  Still lots of hot pixels without darks, but shot noise was low so I could stack lots more sub-images than this 450 stack and still be within limits.

This data was taken in the middle of a metro area with very strong light pollution.  Mag 3 is the dimmest stars you can see naked eye on most nights.   Not one of my best of this object because of all the LP, but it was fun to see it build up and get better and better as the subs were added in.   I should have shot darks before letting it rip on this object, but I did not think I had more than 20 minutes before the Dumb Bell went behind the trees, so I skipped doing them.  Oh, well… next time!

In the meantime, I added another 97 subs to this shot from a session I did last December.   Here is how that turned out:

Dumbbell Nebula – 73.3 minutes (450×8 sec at 1241 Gain, 97×8 sec at 2048 Gain,) RT Sony IMX224, TV-85 at F/5.6, SharpCap 2.9.

For my wide monitor, I created this composite/combined image with the data above, a set of 50×8 sec subs and 14×180 sec ISO 1600 subs from a modified Canon DSLR:

M27 – Combined Data. 600×8 sec, Sony IMX224, 14×180 sec, modified Canon DSLR.

I like this one the best.   🙂

Ring Nebula – Sony IMX224

Ring Nebula – 75×8 sec Gain 1642, Sony IMX224, TV-85 at F/5.6, SharpCap 2.9.

I shot this once before with this camera, but I think this one came out better.   Sharpcap 2.9 was used for acquisition.  Clouds came and went throughout the night, but I had fun viewing lots of other objects in between them.

M27 Planetary Nebula – Sony IMX224

M27 Dumbbell Nebula – Various 5-15 sec exposures at various gain settings. Sony IMX224 and TV-85 at F/5.6.

On this night, after dusting off all the equipment and finding out what still worked and updating my laptop the night before, I decided to play around with a new version of ToupSky I just installed while updating all the hardware drivers and astro software I use.

The version date was Oct 11, 2018, the same day I downloaded and installed it.   They’ve included lots more with this version than they did previously.     ToupSky still lacks 16-bit support for most file formats, however, which is why I still use SharpCap 2.9.

Dark subtraction and flat field correction is now in the public release as well as a number of other bonuses.   Before, you would get these features only with software included with a camera from various companies who resell the ToupTech cameras  (like RisingSky.)

Anyway, this image was created with various Live Stack images I did while testing this new ToupSky version.   It is good for beginners, but the lack of 16-bit support for TIFF and other formats that can do 16-bit really degrades from the usefulness of the package for serious imaging.

Horse Head Nebula – Sony IMX224

Horse Head Nebula. 242×20 sec @ 1834 Gain, RT Sony IMX224, Televue TV-85 at F/5.6, SharpCap 2.9.

More EAA fun with the Sony IMX224-based camera.  This was taken during the nightime of Dec 12/13, 2017.  The final version here has over 80 minutes of data.  It was acquired in a high LP environment with no filters on the camera except for the UV/IR cutoff.

I need to get a UHC filter for it, but as you can see, I might do good to use none just to get the base colors and use the UHC just for extra nebulosity, only.

The Dumbbell Nebula – Sony IMX224

M27, The Dumbbell Nebula. 97×8 sec @ Gain 2098, RT IMX224, TV-85 at F/5.6, Sharpcap 2.9.

I rushed to setup and shoot this one before it went behind a tree.  It was only 97 frames at 8 seconds for a total of about 13 minutes.   But, I love  how it turned out with this Sony IMX224 camera.  It looks as good as or better than most of my DSLR shots of the same object.

It looks even better if I combine the two cameras’ datasets into one image to get the best of both:

M27 IMX224 data combined with 48 minutes (24×120 sec @ ISO 1600) of DSLR data taken with the same telescope.