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. Â Before I release it, I will make sure that everything is working properly and then I will release it.
Hi!
Is there a way in APP to know the magnitude of the sky background? I need that info in photons/pixel/second in a formula to estimate the optimal exposure lenght.
Thanks!
2 years ago I wondered the same question and i have solved my doubt doing this.
I bought a SQM - L meter (with the narrow 20 degree lense), measure the entire portion of the sky where i'm planning to image and along which the object is going to move, than put the average or any other SQM value into this file: https://drive.google.com/file/d/12PHRpiOoUfQuhpJMR_7-ZNJjo1vTRYNi/view?usp=sharing
CheersÂ
@jawknee No there is no such way. Knowing that would require knowledge of the telescope, filters and camera to a level that goes beyond what many people can provide about their own system. Even weather conditions like humidity, transparency and high clouds are influencing this. There are several online resources where you can lookup approximate light pollution levels for your location like
https://www.lightpollutionmap.info/
Hi Jean,
You can use sharpcap pro to do this. The sensor analysis stores the response of your camera and the smart histogram will allow you to define optimum exposure and gain depending on you sky background. It's really quite good and useful too.
