UPDATE FROM MABULA
I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.
Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.
APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46. Before I release it, I will make sure that everything is working properly and then I will release it.
Hi Mabula
I was out last night trying to get some subs of IC 1396 (I only managed 4 before high level clouds ruined the rest), but then when I came to do my Flats it suddenly dawned on me that I wasn’t exactly sure how to take proper flats when doing Narrowband on a DSLR. So maybe you can answer this one for me, based on what APP requires for proper calibration for this type of imaging.
So I took 2 different sets of flats, as I wasn’t sure which was the correct type. I used a great little simple program called FastOne for quickly viewing the Raw files as they came out. The 1st bunch of Flats I took had a short exposure of <1 sec, and these produced a well-exposed Red Channel, but the ‘Luminosity’ Channel in FastOne showed as being under-exposed. The images looked grey in SGPro. The 2nd bunch of Flats I took had a much longer exposure of around 9 secs, and these showed a well-exposed ‘Luminosity’ Channel but a massively over-exposed Red Channel in FastOne. These ones looked white in SGPro. I'm at work at the moment, but let me know if you need to see screen grabs, I can upload them later if the description above isn't clear.
So I’m wondering which ones are the ‘correct’ level of Flats exposure when using one of your NB algorithms in APP. I have a feeling it might be the 2nd type (i.e the much longer exposures) as SGPro showed the Mean ADU as being a little over 8000, which is in the middle region for my 14bit Nikon D5300a, but I was a bit nervous just in case I end up taking all my flats the wrong way.
Thanks in advance!
Hi Xiga,
The frames are calibrated before the debayer algorithms are applied. So in that sense, these narrowband OSC frames have the same guidelines as regular OSC frames. But since not all channels will be used after the debayer process, it's best to follow the following guidelines.
H-alpha debayer - make sure the red channel is well illuminated and not saturated
OIII - make sure both green and blue are well illuminated and not saturated
SII, same as H-alpha, keep the red channel under control.
Let me know if this helps 😉
Mabula
Hi Xiga,
The frames are calibrated before the debayer algorithms are applied. So in that sense, these narrowband OSC frames have the same guidelines as regular OSC frames. But since not all channels will be used after the debayer process, it's best to follow the following guidelines.
H-alpha debayer - make sure the red channel is well illuminated and not saturated
OIII - make sure both green and blue are well illuminated and not saturated
SII, same as H-alpha, keep the red channel under control.
Let me know if this helps 😉
Mabula
Couldn't be clearer. Thanks Mabula! 🙂
