krozawa
Orion's Belt to M42 in Narrowband
Acquired on January 1st and 2nd 2022
Lens: Rokinon 135mm f/2 stopped down to f/2.8
Camera: ZWO ASI294MM
Filters:
Ha 27 x 160s 120 gain -10C
S 25 x 241s 120 gain -10C
O 61 x 74s 120 gain -10C
Total integration = 4.125 hours
Mount: EQ6-R pro
Acquisition Software: NINA
Guide Scope/Cam: Orion 50mm with ZWO ASI120MM-mini
no darks/flats or other calibration frames yet
This was a quick and "dirty" post processing in StarTools. I wanted to take my shiny new lens out for a spin and since my eventual goal is to mosaic the Orion Molecular Cloud Complex, this seemed like a good first attempt.
I first used the smart histogram function in Sharpcap to get the ideal exposure time to minimize noise. The suggestions were for a gain of 119 (unity gain) with the above mentioned exposures. I usually do a gain of 120 to get into the low read noise regime so I naively kept that gain setting and used the approximate times sharpcap suggested.
I was also planning on doing LRGB opportunistically but alas, I forgot to turn my dew heater on and towards the end of the OIII sequence the lens was starting to form some cloudiness. So my LRGB data is junk but at least I got some SHO.
In StarTools I made Ha the Luminance channel and then added SHO for RGB data. So I guess this would be HSHO. For the color I did a modified Hubble Palate where the red was a blend of S and H in order to get the red color of the Ha regions instead of having them green.
Not bad for about 4 hours worth of integration and no calibration frames! I also took about a minute worth of 1 second data in Ha to overlay in M42 since the Trapezium is totally blown out in this image but I haven't gotten to that yet.
Oh and I could definitely see in the data that Ha was fairly sharp but S and OIII were quite out of focus. I don't have a focus mechanism for this system yet and at f/2.8 the focus of the lens is very sensitive.
Orion's Belt to M42 in Narrowband
Acquired on January 1st and 2nd 2022
Lens: Rokinon 135mm f/2 stopped down to f/2.8
Camera: ZWO ASI294MM
Filters:
Ha 27 x 160s 120 gain -10C
S 25 x 241s 120 gain -10C
O 61 x 74s 120 gain -10C
Total integration = 4.125 hours
Mount: EQ6-R pro
Acquisition Software: NINA
Guide Scope/Cam: Orion 50mm with ZWO ASI120MM-mini
no darks/flats or other calibration frames yet
This was a quick and "dirty" post processing in StarTools. I wanted to take my shiny new lens out for a spin and since my eventual goal is to mosaic the Orion Molecular Cloud Complex, this seemed like a good first attempt.
I first used the smart histogram function in Sharpcap to get the ideal exposure time to minimize noise. The suggestions were for a gain of 119 (unity gain) with the above mentioned exposures. I usually do a gain of 120 to get into the low read noise regime so I naively kept that gain setting and used the approximate times sharpcap suggested.
I was also planning on doing LRGB opportunistically but alas, I forgot to turn my dew heater on and towards the end of the OIII sequence the lens was starting to form some cloudiness. So my LRGB data is junk but at least I got some SHO.
In StarTools I made Ha the Luminance channel and then added SHO for RGB data. So I guess this would be HSHO. For the color I did a modified Hubble Palate where the red was a blend of S and H in order to get the red color of the Ha regions instead of having them green.
Not bad for about 4 hours worth of integration and no calibration frames! I also took about a minute worth of 1 second data in Ha to overlay in M42 since the Trapezium is totally blown out in this image but I haven't gotten to that yet.
Oh and I could definitely see in the data that Ha was fairly sharp but S and OIII were quite out of focus. I don't have a focus mechanism for this system yet and at f/2.8 the focus of the lens is very sensitive.