Orion Nebula (LRGB)
Hi all,
Today was clear again in the early evening hours. Managed to capture some more colour data, especially in the green and blue channels. This results in easier post processing, and the cumulated data is smoother in appearance. The latest image below is processed to give a more 'natural' look without having the colours being too intense, yet at the same time preserving the structural details in the outer reaches of the nebula. May like to re-process again later this week, if the skies are clear again, and more data can be bagged. can't imagine if the data were all captured from mersing, the ccd camera would have been in 'steroids-mode'!
Today was clear again in the early evening hours. Managed to capture some more colour data, especially in the green and blue channels. This results in easier post processing, and the cumulated data is smoother in appearance. The latest image below is processed to give a more 'natural' look without having the colours being too intense, yet at the same time preserving the structural details in the outer reaches of the nebula. May like to re-process again later this week, if the skies are clear again, and more data can be bagged. can't imagine if the data were all captured from mersing, the ccd camera would have been in 'steroids-mode'!
WOW, your image is getting better and better with each additional information.
Is there any good method that you can share to how you can point your camera to the same location and also adjust the orientation of the camera so that images from different day can be used without much cropping?
When I process images taken from different session, I will end up with much smaller image due to cropping.
So, when will you be giving us astrophotography course? I will be interested to attend.
Is there any good method that you can share to how you can point your camera to the same location and also adjust the orientation of the camera so that images from different day can be used without much cropping?
When I process images taken from different session, I will end up with much smaller image due to cropping.
So, when will you be giving us astrophotography course? I will be interested to attend.
Hi CK,
You can minimize the need for cropping by ensuring that the imaging camera is squarely placed. The base of my camera is always flushed with the declination axis. This further helps in minimizing the frequency of guiding corrections, assuming you have properly drift aligned the mount. Once this is done, the composure is almost similar night after night. Also, try to remember the position of notable bright stars or any recognizable asterisms in the imaging FOV. In this way, u could get similar composition of the object night after night.
Do note that since drift alignment can never be perfect, after sometime, the image FOV will still "drift" from its original composure location, so depending on your accuracy of the alignment, u will need to slew (in small adjustments) back to the exact same location.
Side note:
I would be more concerned with the variance in light pollution profiles (on the image FOV) as we do not normally take the object at the same altitude on the time. This would pose a greater challenge in post image processing afterwards, especially on faint nebulosity that is very close to the sky background average count.
You can minimize the need for cropping by ensuring that the imaging camera is squarely placed. The base of my camera is always flushed with the declination axis. This further helps in minimizing the frequency of guiding corrections, assuming you have properly drift aligned the mount. Once this is done, the composure is almost similar night after night. Also, try to remember the position of notable bright stars or any recognizable asterisms in the imaging FOV. In this way, u could get similar composition of the object night after night.
Do note that since drift alignment can never be perfect, after sometime, the image FOV will still "drift" from its original composure location, so depending on your accuracy of the alignment, u will need to slew (in small adjustments) back to the exact same location.
Side note:
I would be more concerned with the variance in light pollution profiles (on the image FOV) as we do not normally take the object at the same altitude on the time. This would pose a greater challenge in post image processing afterwards, especially on faint nebulosity that is very close to the sky background average count.
