Category Archives: Nebulae

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.

Owl Nebula – Sony IMX224

The Owl Nebula. 5×300 sec @ 100 Gain, RT Sony IMX224, Televue TV-85 at F/5.6, Sharpcap 2.9.

I tried long exposures with no gain and no darks using the Rising Tech Sony IMX224 eyepiece/guider cam to image the Owl Nebula, recently.  I was using it like I would one of my Canon DSLR cameras with long exposures at low ISO when shooting in bad LP conditions.

Hot pixels were worse than I thought, so I had to do some aggressive noise reduction.   Next time, I will definitely use darks based on this experience.  The camera has low read noise, but not low hot pixels with exposures this long.

The Crab Nebula – Sony IMX224

The Crab Nebula. 414×8 sec @ 3500 Gain, RT IMX 224, TV-85 at F/5.6, SharpCap 2.9.

The Crab with an 85mm objective.   Scopes of this size are not normally known to produce good images of M1, the Crab.  But, I tried anyway since I am still learning the ropes with the IMX224.

Taken from the middle of a metro area in a Bortle Red zone.   8 sec seems to give good results with the LP levels at this location.   More exposure just gets more LP and very little more, if any, faint target material.

Above is the gussied-up and gaudy version.   Below is the not-so-gaudy version with less saturation boost, which I like because it shows more of the nebula:

The Crab Nebula. 414×8 sec @ 3500 Gain, RT IMX 224, TV-85 at F/5.6, SharpCap 2.9.

I also left more green behind, since the Crab has some green parts.   It shows that better but also show more of the LP that I had to cut through to get the shot.

EAA Roundup

M103 Open Cluster. 10×15 sec, 30×8 sec, 540×2 sec @ 2000 Gain. RT Sony IMX 224, TV-85 at F/5.6.
M15 Globular Cluster. 9×8 sec, 47×2 sec @ 2000 Gain. RT Sony IMX 224, TV-85 at F/5.6.
NGC 891 Edge-On Galaxy. 152×4 sec @ 2000 Gain. RT Sony IMX224, TV-85 at F/5.6.
Gamma Cass Ghost Nebula. 50×8 sec @ 2000 Gain. RT Sony IMX 224, TV-85 at F/5.6.
The Little Dumb Bell Nebula. 51×8 sec @ 2000 Gain. RT Sony IMX 224, TV-85 at F/5.6.

Here is a roundup of objects I was able to see during my most recent Electronically Assisted Astronomy (EAA) observing session.  These were taken in a Bortle Red zone and under a nearly full moon on Dec 1, 2017.