<p>I don’t think it’s any of the points you suggest.  The scope and camera are fine for what you are doing.<br />
I’d say that the focus is slightly off. It takes a lot of effort to get it spot on</p>

CC BY-SA 4.0
2020-07-10T13:28:21.880Z
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)
uhoh
CC BY-SA 4.0
2020-07-10T16:00:14.437Z
@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.
Carl Witthoft
CC BY-SA 4.0
2020-07-10T20:25:27.890Z
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).
William Miller
CC BY-SA 4.0
2020-07-11T00:24:45.680Z
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
planetmaker
CC BY-SA 4.0
2020-07-10T12:40:57.043Z
2020-07-10T12:40:57.043Z
Dr Chuck
<p>I attempted to do some lucky imaging of Jupiter using a permanent installation (Celestron <span class="math-container">$14$</span>&quot; SCT + Paramount ME II) and Nikon D5600 attached directly to a Baader Hyperion 8-24mm eyepiece (without a filter). The atmospheric conditions weren't ideal (<span class="math-container">$65$</span>% humidity, <span class="math-container">$2$</span> m/s winds), the telescope was properly acclimated prior to use, and Jupiter was around <span class="math-container">$17^{\circ}$</span> elevation during imaging.</p>
<p>After processing <span class="math-container">$3600$</span> frames (from 1 minute of <a href="https://i.sstatic.net/25MA8.jpg" rel="nofollow noreferrer">video</a><sup>1</sup> at <span class="math-container">$60$</span> fps) with <a href="https://www.autostakkert.com/wp/" rel="nofollow noreferrer">Autostakkert 3</a> and then aligning the RGB channels and recomposing I got these:</p>
<p><img src="https://i.sstatic.net/dwXps.jpg" width="300" /><img src="https://i.sstatic.net/QziLe.jpg" width="322" /></p>
<p>Left (or top if your screen is small) is using <span class="math-container">$20$</span>% of the stack, right (or bottom) is using <span class="math-container">$50$</span>%. Since this is my first foray into planetary imaging my question is: <strong>are my results reasonable given the setup used and atmospheric conditions described?</strong><sup>2</sup></p>
<p>I'm asking because I've seen much better results from people using smaller telescopes. I think the discrepancy is the result of one (or several) of the following:</p>
<ol>
<li>Something is wrong with the equipment I used.</li>
<li>I'm using the wrong equipment.</li>
<li>I'm not processing the images correctly.</li>
<li>This is the best the equipment could do under those conditions.</li>
<li>I did something wrong in my setup or imaging.</li>
</ol>
<p>and I'm trying to rule out number 1.</p>
<hr />
<p>Here is a single, unprocessed frame for reference:</p>
<p><a href="https://i.sstatic.net/AjkVw.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/AjkVw.jpg" alt="enter image description here" /></a></p>
<hr />
<h2> Update </h2>
<p>I have acquired a Bahtinov mask to rule out the focus as the issue, here is an exposure of Manubrij (<em>Omnicron Sagittarii</em>) with the mask:</p>
<p><a href="https://i.sstatic.net/oNvyN.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/oNvyN.jpg" alt="enter image description here" /></a></p>
<p>At the time of imaging, the angular separation between Jupiter and this star was less than <span class="math-container">$6^{\circ}$</span>. Conditions were much better this time, humidity was <span class="math-container">$38$</span>%, winds were less than <span class="math-container">$1$</span> m/s. The telescope was acclimated for about 2 hours prior to use.</p>
<p>Again using <span class="math-container">$3600$</span> frames af <span class="math-container">$60$</span> fps I got these:</p>
<p><img src="https://i.sstatic.net/O26sE.jpg" width="300" /><img src="https://i.sstatic.net/RUZ0c.jpg" width="300" /></p>
<p>Left (or top) is with <span class="math-container">$10$</span>% of the stack, right (or bottom) is with <span class="math-container">$20$</span>%. This looks slightly better to me, but I'm still not sure if this is what I should expect from the equipment.</p>
<hr />
<p><sup>1</sup> Note that the video in the link has been compressed through ffmpeg using the H.265 codec with CRF of <span class="math-container">$25$</span>. <br></p>
<p><sup>2</sup> This result is just one example - I did <span class="math-container">$30$</span> minutes of imaging in <span class="math-container">$3$</span> minute segments over the course of several hours, applying the same process to other sets of exposures yielded similar results.</p>
<hr />

CC BY-SA 4.0
2020-07-10T10:27:06.213Z
Beautiful photos! Astronomical seeing is constantly changing, you can think of it as there being a lot more luck available on some nights than others and in some places than others. It also varies from one location to another, may be better at higher altitude, and in different seasons. Check to see if the images you compare to are from winter rather than summer and/or from the tops of mountains, or past midnight...
uhoh
CC BY-SA 4.0
2020-07-10T10:31:01.013Z
@uhoh I've been hoping it was just the seeing since conditions in my location are typically poor -- although it was better than usual when I took these. I just don't have any reference since this was literally the first time I tried lucky imaging.
William Miller
CC BY-SA 4.0
2020-07-10T10:37:06.907Z
I do believe that with better seeing and preferentially higher altitude you might get considerably better images. you might also want to try longer video sequences and use a smaller percentage - especially as Jupiter won't rise to higher elevation anytime soon. Try playing around with some image sharpening options on what you show here.
planetmaker
CC BY-SA 4.0
2020-07-10T10:42:13.117Z
@planetmaker I have 30 minutes of video over the course of several hours, so I will definitely follow your suggestion. I'm also trying to use DStation to deconvolve what I have here as much as possible... the noise on the composite produced by 20% of the stack hinders the deconvolution - another reason to use a longer sequence. Thanks for the input
William Miller
CC BY-SA 4.0
2020-07-10T12:48:09.563Z
I agree with @planetmaker that elevation is likely an issue. I’d have very low expectations for getting clear images of anything at 17 degrees elevation.  Even if Jupiter is your ultimate goal, you might try a target at higher elevation to help refine your technique and rule out any equipment issues.
Eric Jensen
CC BY-SA 4.0
2020-07-10T14:32:57.280Z
Can you post a single, non-processed frame for reference?  That's what  you really want to compare against.
Carl Witthoft
CC BY-SA 4.0
2020-07-10T20:32:28.097Z
@CarlWitthoft Done, also note that there is a link to the full minute of video in the question body as well (although it is compressed)
William Miller
CC BY-SA 4.0
2020-07-11T14:49:04.830Z
I looks good to me, William, but I don't know. I wish I _could_ answer this question. I have an astronomical telescope, but it's been in its box for far too long.
John Duffield
CC BY-SA 4.0
2020-08-11T22:40:07.600Z
@a_donda Thanks for the input. I did not combine any images that were more than a minute apart (I used a maximum of 3600 frames of 60 fps video each time), but I applied the lucky imaging processing to different small video segments collected over the course of several hours. Is 1 minute of video too long for a single image?
William Miller
CC BY-SA 4.0
2020-08-13T06:10:09.783Z
fyi I’ve just asked: [Why exactly does a Bahtinov mask's center spike move with respect to the other two with change in focus?](https://astronomy.stackexchange.com/q/38443/7982)
uhoh
<telescope><photography><jupiter>
Lucky imaging with Celestron 14 - is this result reasonable?
William Miller
# Lucky imaging with Celestron 14 - is this result reasonable?

(Asked by: username_0 on 2020-07-10)

I attempted to do some lucky imaging of Jupiter using a permanent installation (Celestron $14$" SCT + Paramount ME II) and Nikon D5600 attached directly to a Baader Hyperion 8-24mm eyepiece (without a filter). The atmospheric conditions weren't ideal ($65$% humidity, $2$ m/s winds), the telescope was properly acclimated prior to use, and Jupiter was around $17^{\circ}$ elevation during imaging.

After processing $3600$ frames (from 1 minute of [video](https://i.sstatic.net/25MA8.jpg)1 at $60$ fps) with [Autostakkert 3](https://www.autostakkert.com/wp/) and then aligning the RGB channels and recomposing I got these:

![](https://i.sstatic.net/dwXps.jpg)![](https://i.sstatic.net/QziLe.jpg)

Left (or top if your screen is small) is using $20$% of the stack, right (or bottom) is using $50$%. Since this is my first foray into planetary imaging my question is: **are my results reasonable given the setup used and atmospheric conditions described?**2

I'm asking because I've seen much better results from people using smaller telescopes. I think the discrepancy is the result of one (or several) of the following:

1. Something is wrong with the equipment I used.
2. I'm using the wrong equipment.
3. I'm not processing the images correctly.
4. This is the best the equipment could do under those conditions.
5. I did something wrong in my setup or imaging.

and I'm trying to rule out number 1.

---

Here is a single, unprocessed frame for reference:

[![enter image description here](https://i.sstatic.net/AjkVw.jpg)](https://i.sstatic.net/AjkVw.jpg)

---

## Update

I have acquired a Bahtinov mask to rule out the focus as the issue, here is an exposure of Manubrij (*Omnicron Sagittarii*) with the mask:

[![enter image description here](https://i.sstatic.net/oNvyN.jpg)](https://i.sstatic.net/oNvyN.jpg)

At the time of imaging, the angular separation between Jupiter and this star was less than $6^{\circ}$. Conditions were much better this time, humidity was $38$%, winds were less than $1$ m/s. The telescope was acclimated for about 2 hours prior to use.

Again using $3600$ frames af $60$ fps I got these:

![](https://i.sstatic.net/O26sE.jpg)![](https://i.sstatic.net/RUZ0c.jpg)

Left (or top) is with $10$% of the stack, right (or bottom) is with $20$%. This looks slightly better to me, but I'm still not sure if this is what I should expect from the equipment.

---

1 Note that the video in the link has been compressed through ffmpeg using the H.265 codec with CRF of $25$.

2 This result is just one example - I did $30$ minutes of imaging in $3$ minute segments over the course of several hours, applying the same process to other sets of exposures yielded similar results.

---

**Tags:** telescope, photography, jupiter

> **Comments:**
> **username_1**: Beautiful photos! Astronomical seeing is constantly changing, you can think of it as there being a lot more luck available on some nights than others and in some places than others. It also varies from one location to another, may be better at higher altitude, and in different seasons. Check to see if the images you compare to are from winter rather than summer and/or from the tops of mountains, or past midnight...  
> **username_0**: @username_1 I've been hoping it was just the seeing since conditions in my location are typically poor -- although it was better than usual when I took these. I just don't have any reference since this was literally the first time I tried lucky imaging.  
> **username_2**: I do believe that with better seeing and preferentially higher altitude you might get considerably better images. you might also want to try longer video sequences and use a smaller percentage - especially as Jupiter won't rise to higher elevation anytime soon. Try playing around with some image sharpening options on what you show here.  
> **username_0**: @username_2 I have 30 minutes of video over the course of several hours, so I will definitely follow your suggestion. I'm also trying to use DStation to deconvolve what I have here as much as possible... the noise on the composite produced by 20% of the stack hinders the deconvolution - another reason to use a longer sequence. Thanks for the input  
> **username_3**: I agree with @username_2 that elevation is likely an issue. I’d have very low expectations for getting clear images of anything at 17 degrees elevation.  Even if Jupiter is your ultimate goal, you might try a target at higher elevation to help refine your technique and rule out any equipment issues.  
> **username_4**: Can you post a single, non-processed frame for reference?  That's what  you really want to compare against.  
> **username_0**: @username_4 Done, also note that there is a link to the full minute of video in the question body as well (although it is compressed)  
> **username_5**: I looks good to me, username_0, but I don't know. I wish I _could_ answer this question. I have an astronomical telescope, but it's been in its box for far too long.  
> **username_0**: @a_donda Thanks for the input. I did not combine any images that were more than a minute apart (I used a maximum of 3600 frames of 60 fps video each time), but I applied the lucky imaging processing to different small video segments collected over the course of several hours. Is 1 minute of video too long for a single image?  
> **username_1**: fyi I’ve just asked: [Why exactly does a Bahtinov mask's center spike move with respect to the other two with change in focus?](https://astronomy.stackexchange.com/q/38443/7982)  

---

## 1 answers

### Answer by username_6 on 2020-07-10. Score: 2

I don’t think it’s any of the points you suggest. The scope and camera are fine for what you are doing.  
I’d say that the focus is slightly off. It takes a lot of effort to get it spot on

> **Comments:**
> **username_1**: 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)  
> **username_4**: @username_1 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.  
> **username_0**: 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).  
> **username_2**: 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  

---

