Timeline for Lucky imaging with Celestron 14 - is this result reasonable?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Aug 11, 2020 at 12:23 | comment | added | user34599 | @WilliamMiller: use a Bahtinov mask to find the focus. The eyes are decpetive, expecially for those of us beyond 40 ;-). Mind moisture that could build up. The 45min cooling time are too short, give it 2 hours. If that doesn't sharpen the image, it's simply atmopsheric conditions that don't allow better results. That happens. | |
| Jul 11, 2020 at 0:24 | comment | added | planetmaker | Don't yet focus on Jupiter, but use a bright star instead. With my Dslr I set it to video mode then and minimize the star's image. Then I switch back to photo and go to the object of interest | |
| Jul 10, 2020 at 20:25 | comment | added | William Miller | My instinct was the focus being off. I tried minimizing the spot size of Callisto, Ganymede, and Altair to improve the focus, even hooked up my laptop and ran some point spread minimization to no avail. I tried both using the 'live view' of the camera and iteratively taking a few frames and gently refining the focus -- but every exposure still looks slightly out of focus to me. I'm going to try a Bahtinov mask next week but if that doesn't improve it I'm not sure where to go from here (assuming it is in fact not able to focus correctly). | |
| Jul 10, 2020 at 16:00 | comment | added | Carl Witthoft | @uhoh Use of an LGS won't really help in LuckyImaging, because LGS is intended to help measure the atmospheric distortions, while LI "skirts around" it. However, simply adjusting focus to minimize the image spot size of any actual star in the vicinity of Jupiter's angular position should suffice. | |
| Jul 10, 2020 at 13:28 | comment | added | uhoh | This sounds like the beginning of a new question about how to get focus spot-on, better than atmospheric seeing allows, using amateur equipment (rather than a laser/artificial star) | |
| Jul 10, 2020 at 12:40 | history | answered | Dr Chuck | CC BY-SA 4.0 |