Jump to content

Banner.jpg.b83b14cd4142fe10848741bb2a14c66b.jpg

alexbb

Members
 View Profile  See their activity

  • Posts

    1,247

  • Joined

  • Last visited

  • Days Won

    3

 Content Type 

Everything posted by alexbb

  1. alexbb
    Canon 300 F4 L IS lens, 12h Ha, 10h O3, 7h S2. Canon 300 F4 L IS, Tair 3s, Pentacon 200 lenses. 30 hours of Ha, O3 and some S2. Some hours of RGB for stars. 2 panels mosaic. This a 4 panels Ha mosaic with the 130 PDS + some hours of Ha and O3 with the Canon 300 F4 L IS lens. 130PDS. 12h of LRGB and Ha. Canon 300 F4 L IS. 22.5h, 4 panels mosaic. I have this with O3 too, but I finished the acquisition of O3 this year. All of them were shot with the ASI1600MMC on an AZ-EQ5 mount. Except the last one, all were shot from the city center under heavy light pollution and very poor seeing. The last one was taken under better conditions, still under light pollution, but orange-red zone and usually better seeing.
  2. alexbb
    Have you read this CN thread? https://www.cloudynights.com/topic/480805-tak-fsq106-vs-sw-esprit-100/
  3. alexbb
    How much longer does it usually take to send an Esprit to Es for checking/adjusting?
  4. alexbb
    Thank you and congratulations to you all! I'm very flattered with your choice! As a sign of gratitude, I promise to add more data to this picture in the future and present you an improved version of it, also one with O3 and RGB. Clear skies to you all! Alex
  5. alexbb
    Thanks, Rob! I've some things to improve, perhaps first I should flock it. I sometimes think to upgrade to a 8" F/4 carbon or even a 6" RC, but then I remember that I don't even reach this scope's limits due to poor seeing. I'm quite pleased with it's stock performance and also with the results. What bothers me most are the halos around the brighter stars, but I don't believe I will replace the corrector soon just for that.
  6. alexbb
    I didn't post to this thread for a while, although I took some shots with the 130PDS. Camera used is ASI1600MMC. M1 is ~30min Ha and same for O3, binned 2x2, 1/4 crop, 60s exposures at 300 gain. This is just to see how large it is and if I should have a go at it after I move. M13 I think is ~1h in 5s and maybe 30s exposures. Can't remember the other details. M27 - ~6h of HaO3RGB, more details on astrobin: https://www.astrobin.com/297809/D/ M33 - ~12h of HaLRGB, more details on astrobin: https://www.astrobin.com/313011/ IC405 and IC410 - 4 panel mosaic, each panel is ~2h Ha, 180s exposures at 300 gain. I'm currently working on this, but it will be a combination with a wider lens that fills the whole area. I should come back to this thread in the following period. Clear skies! Alex
  7. alexbb
    Nice! Guiding seems spot on. I wish I could see this from my balcony. Clear skies!
  8. alexbb
    Thank you!
  9. alexbb
    I had 16 minutes of O3 as well, but I did not include them in the images above. They're in the first one below. And the second one is the 25mins each RGB and 23mins of Ha and the 16mins of O3. This means less than 2 hours in total. Just to see what's visible in 2 hours under the LP.
  10. alexbb
    Thanks, Wim! The RGB were binned 2x2 just to have a quick coloured image. I have to shoot them also at full resolution next time, when the moon won't lit the sky and if the seeing is good enough. But first the B is mandatory. Then O3.
  11. alexbb
    For a total of ~5h and a half of Ha and 25 minutes each RGB channel, the Ha layer, the RGB and the RGB + Ha. Unfortunately, when I started shooting B, the seeing/tracking/something went worse so the stars seem bloated in B, like an uncorrected refractor, but also slightly elongated. Ha: 23 mins in 60s subs + 5h and 12 mins in 180s subs @300 gain. RGB: 60s subs @139 gain. Sleep time now.
  12. alexbb
    It might have been my display. It looks brighter on my laptop.
  13. alexbb
    Looks nice. It seems to me that you clipped the background. You might have some details hidden there and also the transition from the galaxy to the background would look smoother.
  14. alexbb
    Hmmm, don't the 2 leftovers add some unwanted diffraction?
  15. alexbb
    Clear last night. I had a go at bubble nebula, the tracking/guiding went better than ever in the balcony. Minimal processing of 23mins of 60s exposures + 1h39min of 180s exposures. Cooled to -12C and gain 300 used. The gradient was awful, I couldn't remove it properly and StarTools crashed when I tried to do the noise reduction so no noise control either. Fingers crossed for another clear night. Clear skies too, Alex
  16. alexbb
    Is it last night's? Your image says it's last year's
  17. alexbb
    For a total of 12 hours, 6 hours for each channel, it might be the final the last data that I acquire from home this year on the Veil. Maybe some RGB data for the stars and maybe more somewhere dark, later in August. I'm not very happy with something in this image. I don't know if it's my processing or just the data doesn't help me. Anyway, enough processing for today. Thanks for looking and clear skies, Alex
  18. alexbb
    Or is this one better? This has ~one more hour of Ha. Clear skies surprise.
  19. alexbb
    Latest additions to Veil for a total of 4h Ha and 6h O3. M27 RGB: 23 minutes each channel. M27 RGB-HOO: RGB above + 1h Ha + 2h O3. 2 versions. I guess this would be all for at least a week. Thanks for watching, clear skies! Alex
  20. alexbb
    Nice! I need to get some colour too, but I only have a window of about an hour before it gets out of my sight. And then I switch to Veil. I might try to put the DSLR too with the Canon lens and try to get some coloured stars.
  21. alexbb
    What do you mean by throwing money at your 80ed? What are you upgrading on it? The 130 reflector will provide a much larger light gathering area therefore increased resolution, but having a central obstruction will also put some more light on the outer airy layers so the stars will look a little more bloated. You should get good stars with the 80ed, especially in nb. It's the light gathering time that is much longer on the slower frac in order to get the same amount of photons from the same area of sky. I was pretty close in buying an 80ed, several times, but in the end I bought a sh Canon 300 F4 L lens and I'll save for a new Esprit. But 75% of the nights I'm limited by seeing to ~2". And, btw, my 130PDS was also bought sh, only the coma corrector being new. Thanks! I'm hoping for at least twice the amount of integration time, but I'm pretty disappointed by the resolution. For the O3 nights I had the PHD reporting me ~2" RMS total error, for the Ha I was luckier to have a better seeing of 1.6" or so, which is still worse than the resolution of the 585mm FL and the ASI1600 sensor are aiming for. For the M27 I didn't even bother and I binned 2x2. I would try it if I were you. Just remember how much you turned the screws so you can revert if it's worse.
  22. alexbb
    Also, I have now one more O3 hour on the Veil for a total of 4.5 hours of O3 and 2.5 hours of Ha. I also acquired one hour of O3 on the Dumbbell 30 mins of 60s exposures and 30 mins of 180s exposures stacked in DSS with HDR stacking mode. Overstretched and very noisy. Though, it's an improvement over my last year's attempt at M27, I can't remember how much data I had, but there were just a few subs taken with the DSLR, but under better skies. Thanks for looking, Alex
  23. alexbb
    I always assumed that this is their purpose, but I didn't mess with them as I didn't need. Aren't they allen screws? I'm at work now (lunch break) and I'm not near the scope to confirm. Being allen screws, I remember that I could access them maybe with the short side of the allen key.
  24. alexbb
    Same as Adam, I pushed the primary up the tube, but I also changed the screws with longer ones. The focuser still pops in the light path, but just a little.
  25. alexbb
    Glad you sorted it out. And yes, it should apply to reflectors too. On another note, my focus routine for the last 3-4 sessions was just to place the bahtinov mask and check the focus. But, on the other hand, the ASI 1600 + the manual filter wheel are lighter than other camera combos. And one more iteration of the Veil, this one with almost 3.5 hours of O3. I shot last night one more hour of O3, but it's not processed yet. The seeing was not very good when I shot the O3 so the image is resized to half and even the small stars look pretty big. I won't put much effort though in processing until I have all the data I want. I plan to gather at least 5-6 hours on both Ha and O3 before I switch to something else, but it seems that the weather does not allow this soon. Clear skies and thanks for looking, Alex
×
×
  • 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.