17 replies to this topic

[mayhem13]

 

Night before last from NJ. C9.25 20% of 31k frames 180 seconds. 2x Barlow, ADC, ASI224mc w UV filter. Stacked with AS, processed with Registaxx and PS. Wish I still had the 14” that night.

[CharLakeAstro]

Not too bad....                              ...Who am I kidding?!! 

 

That's freaking awesome. Well done, and thanks for sharing 

[t-ara-fan]

That is really nice. With the C9.25"?

 

Would you be so kind as to post one good frame from the raw video?  

I want to compare your before and after.  And see how mine stands up against it.  

[mayhem13]

Not too bad....                              ...Who am I kidding?!! 

 

That's freaking awesome. Well done, and thanks for sharing 

Thank you!…I’ve been working at this for 3 years just waiting for a night of perfect seeing. 

[mayhem13]

That is really nice. With the C9.25"?

 

Would you be so kind as to post one good frame from the raw video?  

I want to compare your before and after.  And see how mine stands up against it.  

Sure thing…..give me a bit.

 

I was at this that evening for 2 hours….video after video like always waiting on the seeing….and then it happened…..Jupiter didn’t move about the frame…..it just stayed still like I’ve never experienced before so I started another capture……the last 60 seconds they seeing went bad again. I processed 20, 35 and 50% but 20% was the best of the bunch. Went back at it and did 10 and 15 percent but there was no improvement…..only more noise than at 20.

[miketz]

This is probably the best Jupiter I have seen from a C9.25. It s definitely the seeing but also your scope seems sharp. Havent had good seeing so far with my C9.25 but you definitely set the benchmark!

[Ittaku]

Super image. Great work!

[RedLionNJ]

I cannot emphasize enough how pleased I was to see your remarks along the lines of "best seeing in 3 years" and "waiting two hours for seeing", etc.  That's exactly the NJ imaging experience I've been relating to everyone for many years now. You can't just go out on a random night, set up and expect great results. You need to have everything in place (including experience) and wait. And wait. And try frequently. And wait some more. And even more.  And eventually, you get those few minutes you've been waiting for and you realize your scope isn't a lemon, you did learn a lot along the way and you wish you'd captured even more data when the seeing was very good.

 

Well done and congratulations!

[mayhem13]

I cannot emphasize enough how pleased I was to see your remarks along the lines of "best seeing in 3 years" and "waiting two hours for seeing", etc.  That's exactly the NJ imaging experience I've been relating to everyone for many years now. You can't just go out on a random night, set up and expect great results. You need to have everything in place (including experience) and wait. And wait. And try frequently. And wait some more. And even more.  And eventually, you get those few minutes you've been waiting for and you realize your scope isn't a lemon, you did learn a lot along the way and you wish you'd captured even more data when the seeing was very good.

 

Well done and congratulations!

Thanks!

 

Something to add that i did very differently that night.....i bumped the gain to 350 and lowered the frame rate 1.85ms frame rate to get a histogram average around 60. This took my frame rate to 210 avg fps....faster than i have ever imaged before. I'm going to repeat that next session if possible.....clearly that won't work on Saturn though

 

I wonder if the really fast frame rate had something to do with it?

[RedLionNJ]

 

I wonder if the really fast frame rate had something to do with it?

Very possibly. I know Don (dcaponeii) sometimes finds a faster frame rate can (on occasion) help with "beating the seeing" - I think it all depends what TYPE of so-so seeing we're encountering, what frequency, nature, etc.

[Ittaku]

I cannot emphasize enough how pleased I was to see your remarks along the lines of "best seeing in 3 years" and "waiting two hours for seeing", etc. That's exactly the NJ imaging experience I've been relating to everyone for many years now. You can't just go out on a random night, set up and expect great results. You need to have everything in place (including experience) and wait. And wait. And try frequently. And wait some more. And even more. And eventually, you get those few minutes you've been waiting for and you realize your scope isn't a lemon, you did learn a lot along the way and you wish you'd captured even more data when the seeing was very good.

Well done and congratulations!

I would say there's no need to even talk about NJ here. The same applies for almost everywhere in the world outside the tropics. Experiencing quality seeing comes out of enduring quantity seeing.

[mayhem13]

I would say there's no need to even talk about NJ here. The same applies for almost everywhere in the world outside the tropics. Experiencing quality seeing comes out of enduring quantity seeing.

You ain’t kidding!……three years certainly qualifies for quantity! 
 

I think the other factor that made this possible from a 9.25 is that Jupiter was up around 60 degrees…..that hasn’t happened in the 3 years I’ve been at this either. All of my Saturn pix are pretty much garbage…..Saturn hasn’t been above 37 degrees for the past three years here.

[Silent_Light]

Absolutely stunning image!!

Well worth the wait and time !!

[Ittaku]

I think the other factor that made this possible from a 9.25 is that Jupiter was up around 60 degrees…..that hasn’t happened in the 3 years I’ve been at this either. All of my Saturn pix are pretty much garbage…..Saturn hasn’t been above 37 degrees for the past three years here.

Yep Jupiter is 37 for us this year. Saturn is slowly leaving our skies but still 65 degrees which is why I'm spending so much time on it this year.

[RedLionNJ]

I would say there's no need to even talk about NJ here. The same applies for almost everywhere in the world outside the tropics. Experiencing quality seeing comes out of enduring quantity seeing.

While perfectly true, Con, I was emphasizing that Mayhem13 and I are only a few miles apart, geographically (and in my opinion, NJ does have worse average seeing than a lot of the world, too).

 

Or maybe I'm just not as dedicated as you, or, as already pointed out, elevation has a lot to do with it as well. It's our time!

[Konstantin 1980]

The image shows that the point details are deformed, this may be a problem with the quality of the optics; in a bad atmosphere such blurring does not occur (it will be uniform), with the exception of strong jet streams.  I have the same region, a few days earlier at 250 mm Newton, it is clear that most of the small structures in your photo are highly distorted (elongated in some direction). Of course, it could also be due to improper processing.

I see that you have a distortion along the equator, and a little less - perpendicular to the equator. This is very similar to severe astigmatism. You just need to understand what caused it.

 

Edited by Konstantin 1980, 24 September 2023 - 08:17 AM.

[Konstantin 1980]

try to photograph double stars, I think that the normal diffraction pattern will not be visible there. My telescope draws it perfectly, here is a photo as an example 

[mayhem13]

Thanks. Yes…..I didn’t use Winjupos for derotation as I wasn’t able to do any more captures….the seeing fell apart. This likely accounts for the equatorial distortions you mention…….Jupiters jet streams and currents move at unpredictable speeds so there’s really no consistency to be had I think. Very nice image! It was a coin toss for me between using the C9 or my 250 f4 newt too…….the C9 won as I did some observing early which I can’t do with the newt mounted equatorially.