Jump to content

Narrowband

neil phillips

Members
  • Posts

    9,017
  • Joined

  • Last visited

  • Days Won

    30

Everything posted by neil phillips

  1. I find hard to myself that when i get serious about imaging. Hence lugging a 40kg system into the garden a lot. But even then UK skies temper what we often get. But your right it is all about being realistic.
  2. Was Testing my New 462 mono. After Saturn i tried a few hurried captures before i got to Jupiter. Unfortunately wind was getting even stronger, and was blowing around a lot. captured between 4 and 5000 frames (normally i capture 10000) As i was running out of space. Despite all that, still hasn't come out terrible. Couldn't be bothered to frame the shots, ( mostly Clavius) The chip size might be limited compared to my 178mm. But its more sensitive. So i certainly will be using it for smaller close ups lowish elevation mid twenties All shots either full size capture size. Or slight downsizes Orion 245mm Newtonian F6.3 Player one IR 685 Filter. QHY462MM click for full size
  3. All of the above See my short Saturn example showing the de focus effect. I know you also had this problem last year. So far its been a good seeing killer for me. It will change. The good thing is Jupiter will enter cooler weather high up
  4. Tried Jupiter in bright daylight. Couldn't get a lot of frames the wind picked up and it was jumping around all over the place spent more time pausing then capturing.
  5. Here is a small example of my theory to do with the de focusing effect happening a lot around the country. Their was no jet stream. This is essentially good seeing being destroyed by a different atmospheric effect, unrelated to the jet stream. I believe we are seeing warm dry pockets of air, Mixing with the cooler night air. When those pockets of different temperatures Collide. The image defocuses. Think of standing in the sea it feels cold. then as you walk around you feel a warm area hit your legs. I believe its a similar effect. What i haven't figured out. Is exactly what causes those pockets of different temperatures to manifest. But clearly long dry spells of sun are related. I wonder if the seeing will Improve on Jupiter around autumn. As the heat effect becomes less troublesome. Its a theory. Now to wait to see if it happens 02_38_14_F01085-01500_pipp.avi
  6. What's also quite remarkable is its often more difficult to get detail with a reduced phase. But that's not happening here. What detail can be seen is fully on show. Just wondaful. Congrats on a superb capture I have a feeling the seeing was at its best at this point. Before the temperature dropped and warmer air started mixing with cooler air.
  7. Cheers Roy tried this morning but was very windy
  8. Cheers Pete should encourage others to try with small scopes i hope
  9. This is what's frustrating. the conditions not allowing that kind of image. But its possible In UK skys. Different locations may be better than others. Would need very steady air to get it all the way around. But its doable in the UK . Just conditions
  10. Wanted to try the New camera. Was way to windy, so just kept trying to pause as it flew off screen lol. I am learning a lot about this out of focus seeing that keeps happening. There was no jet stream. totally still. Unfortunately The image Was constantly defocusing. Like right out of focus. It started Really bad. with the wind and defocusing i didn't hold out much hope on a reasonable first shot with the new camera. But stubborn as i am As it got higher, The defocusing was happening somewhat Less. Enough to get some mediocre frames between the pausing and wind. If i could get good conditions, I can tell this is nothing compared to what i think i could get. I reckon this is about 40 50% of what i know is possible at my location. Still it was better than the other day. And i like this mono chip Orion 245 Player one IR685 QHY 462MM Image was drizzle resized Second image less cleaned up different process
  11. Yeah can tell you had poor seeing. It will improve when you get Jupiter higher. For now its a mono camera as i need to get green and blue Baader filters. But the camera is so good its worth dabbling in RGB Again at some point
  12. Plenty of time Ibbo. I need the exercise lol. So that's a inspiration too. But Jupiter is back and steadily getting higher how long have we waited for this This is now in my hands and i am thrilled
  13. That's how i see it too good practice. The only capture that's really come out any better was the IR. Its also good practice processing gas planets something i am rusty with. I am currently using two programs. But will revert to the less noisy one here and their i think as Kon is right too much noise is creeping in, despite the detail i am pulling out this early. I may try some re processes. But really i just need far better data
  14. Hi Russ i don't doubt it. No jet stream has its effect. Unfortunately for me using quite large optics. For some reason. ( its a trait) It wouldn't settle, i suspect its the large optics struggling to reach equilibrium. I don't really want to be doing major surgery. But could likely benefit from a fan firing across the surface of the mirror, To disrupt the boundary layer. Great as large Newtonians are they don't come without their own set of issues. I will likely run the fan a lot more between captures. Even try some with it running. But contrary to what i read on other forums. Often i find that's worse. I will also keep using my 245 mm Orion. which is a little less troublesome.
  15. Hi Pete agreed it will also be bigger and brighter with better contrast in darkness. Lets not forget this only the second early attempt
  16. Cheers really because of the out focus problem i needed more frames. Some of the reason results not as good as i would like. But its early days
  17. Trust me, if i could just get good seeing and have Saturn sharp without constantly going out of focus. The result would destroy what i am getting at the moment. Had a few glimpses of that on the 16th, but again, just glimpses Some of it might not be seeing. Larger optics often don't stabilize. They fluctuate. It may be that what's causing me grief hard to be sure. At least with Jupiter its going to be so high, i know i will get something good at some point. These are 30 degrees in daylight. So its going to get a lot better. The better the data, the less processing you need Saturn is very hit and miss. I also don't get long before it hits a roof. But i am stubborn. it often pays off being like that. I live in hope. Cameras now running. was just playing with it. No hassle loading it.
  18. It was the going in and out of focus type. Though not as bad as I've seen, still far from great. Haven't got great seeing on Saturn yet. Color is also more difficult. And i prefer straight color captures no added IR s which makes it more difficult. Here's a Saturn in color its improving but still no where near what I've caught before. Bad data makes me push things. trust me its preferable to blur My 462MM just arrived. So that's going to be fun when Jupiter's 50 degrees I may try some RGBs need to get a green and blue. will try a red 610
  19. color shot 30 degrees daylight 12" Stella
  20. Just for fun Roof hugging 15 degree elevation. Sky watcher 90mm F10 achro.
  21. Exactly what i thought Stuart. Hard to be exact my clocks gone bananas on the lappy. But i can tell it was before the sun came up, But daylight so as a guess i reckon maybe 25 degrees give or take, slightly lower or higher. Its interesting on a few fronts. And really just confirms to me something I've debated in the past. Regarding sampling under certain situations. Ideal was around F11.5. I was considerably over that F20 and that doesn't take into account the long ADC extension. The native image correct sampling would have been more difficult to get focus. The size would be tiny. But seriously oversampled and zoomed in to 175% i could start to see small differences of focus about 2 mm in movement really tiny amounts were making big differences in perceived detail. Its highly likely the reason i have done so well. Is breaking all the rules. However uncomfortable that is for our theorist friends. Couple that with the 150" resize. has made a mockery of the little scopes ability. I knew it was a goodun But at that elevation. I was floored. The amount of detail on show. Normally with these kind of things you just see a couple of bands. maybe 3.with little else going on. I can see a collection of white ovals on this lol. Crazy little scope
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.