Jump to content



  • Posts

  • Joined

  • Last visited

Everything posted by hograt

  1. Hi, I've not posted an image in a long white. Not because I've failed to collect photons but rather I've been slow with the processing and publishing. I thought I'd post a few images today from the Autumn/Winter. Hope you enjoy. All imaged with the following set up. William Optics Zenithstar 105mm @F4.5, Atik 16HR + Astronomics LRGB + Baader HaOIIISII, iOptron IEQ45 PRO mount, software processing PI1.8 All subs generally 20 or 30 minutes autoguided (i) Veil Nebula - 9 panels total light collected over 25 hours in Ha (ii) NGC7635 Bubble Nebula (3.5 hours) (iii) NGC281 Pacman HaOIII (5.3 hours) (iv) Gamma Cygni Nebula Ha (4.3 hours) (v) Pelican Nebula - 2 panels in Ha (5 hours) (vi) M45 Pleiades (2 hours) - I spy green halos! (vii) Caldwell 49 Rosette Nebula - just 3 x 20 min exposures so far - WIP Cheers Martin
  2. I have my replacement ☺ goog job resolving this Baader.
  3. I took my eye off this thread. Well, it has certainly developed since the OP. I didn't receive a reply from Baader back in August when I contacted them. I gave up at that point. I'm glad to see there is a product recall. I sent another email tonight with the requested proof of purchase and a sample image. BTW I purchased my filters from Amazon Spain so thought the direct approach appropriate. I'll let you know the outcome. Thanks, Martin
  4. Having looked at the original posting on a computer monitor it appears to suffer from compression artifacts. Here's another which hopefully is better. Thanks for the encouragement Martin
  5. For the last couple of weeks I've been working on a 9 panel mosaic of the Veil Nebula, so far I've completed 2 panels in Ha. 8 x 20 min subs for each panel. With some luck I hope to get this completed in the next month, weather permitting. Best regards, Martin
  6. if just outside 12 month warranty period - up to 2 two years http://europa.eu/youreurope/citizens/shopping/shopping-abroad/guarantees/index_en.htm I've used this before to get computers fixed free of charge after the retailer refuses after the initial 12 months. It pays to research the problem and model to see if it is widespread - after 6 months of ownership the onus is on the buyer to prove there is a fault due to shoddy workmanship etc. Martin
  7. here is my first image with the filters taken last week. I did crop the brightest start just on the bottom which had a hint of halo. Suggests the problem appears above a certain brightness threshold (OIII is blue in false colour spectrum)
  8. Thanks for the quick response chaps, all input is appreciated!! MarsG76 - thanks for your time, I'll follow your advise tonight and have a crack without the focal reducer - provided I am blessed with a clear sky two nights running! I'll post again tomorrow. Failing that I'm out the country for a couple of weeks and will have another go on my return. Best regards, Martin
  9. Steve, Both are 30 minute exposures binned 1x1. I struggle to blame anything else but the filter as the Ha image is flawless. Martin
  10. Hi, I received a set of three narrowband filters - these at 1.25" Ha, OIII, SII manufactured by Baader Planetarium. I purchased these as they were advertised as being reflection-free and I've seen plenty of images of high standard coming from them. Last night I was imaging through my William Optics ZS105 Apo / Altair Astro F0.6 FR. See the attached comparison between Ha vs OIII filter / Atik 16HR. Both images are raw uncalibrated with the same histogram transform applied to give a non-linear image suitable for display. I've contacted Baader for their assessment - has anyone here seen something similar and/or is there a good reason for this I'm missing? Thanks, Martin
  11. Hi, A quick post - can provide information if anyone is interested. Really a work in progress as I've not completed exposure or processing. Cheers, Martin
  12. Michael, I have the older version with RS232- you may have the us but version. I use a usb-RS232 adapter then assign a comm port. You need to go on the lakeside astro website and grab the ASCOM driver and FocusMax (free version). Get it running with focus mask and then see if you can select Focus Max Hub as an ASCOM device in APT. I don't use APT but this workflow works for several other packages I do use. Martin
  13. I picked up an Altair Astro badged x0.6FR from a local astronomy festival at the weekend. I've been looking for something to replace an old Antares F6.3 SCT FR from many years back, which I have kept in service as my set up has evolved. I've had good success with it but recently i've noticed it is causing some sag because I've had to rotate my filter wheel 180 degrees as I've transitioned from observatory peer back to tripod and the additional leverage is too much for the 2" Antares camera adapter. A long story...... Anyway I was wondering if anyone had success with this FR from Altair - I can't say I'm overly happy with it given first light although it wasn't expensive (£75) It's attached to a William Optics Zenithstar 105 F7 triplet bang on the recommended 55mm spacing between FR and CCD (through a filter wheel and spacers) and it is sold as being suitable for this focal length. It's marketed as a field flattner. Actually my field is pretty good at prime focus so that wasn't my primary motivation to buy. It's certainly increased the field of view and I'm not disappointed with the increase in brightness and reduction in exposure time. However, the level of image distortion is severe at the edges. This is perhaps not surprising for a larger CCD but I used an ICX285-based camera last night and this is hardly a large chip. So I'm wondering if those individuals with similar set up / experience of this focal reducer than point me in the right direction (i) live with it because it isn't matched to your OTA and its cheapo (ii) it can do better - go try harder. I've attached an image for illustration - excuse the quality but this is from last night and there is only a couple of hours exposure so far and the jpeg compression is harsh. For reference, I did also take a shot without the focal reducer earlier in the month and there wasn't significant coma. Thanks Martin
  14. Cheers Chris, I was thinking about buying the Baader N/B filters to replace my dodgy Astronomics. Good to see the filters don't produce the bloated stars I'm currently living with. Amazon sell them at a very competitive price[emoji1][emoji1] Martin Sent from my iPad using Tapatalk
  15. That's a good question. The maximum exposure will depend on a number of factors including mount, camera and light pollution. I used to push out to 15 minute exposures during winter with my DSLR using a light pollution filter - up to 2 to 3 hours in total I lived in a semi-rural location so I expect you will have less opportunity to go so high. I found the best image quality was attained at ISO400-800. Whenever I ventured above that the quality fell away. You'll find most people here put in e.g. 5 hours imaging and at least the same with image processing. Preparing flat and dark images for calibration is time consuming but worth the effort. The flats would help eliminate the vignetting at the corners and any noise which comes with longer exposures with be lessened with the darks. I think you are showing the great potential of your kit and to echo the other comments you could improve further not by changing settings but by increasing the signal i.e. taking many more exposures. I'd also take a look at some processing examples to remove light pollution and specifically how to create synthetic flats. This is a progressive hobby and you will be able to see improvements very quickly. You're on the right track - keep going. Keep posting! Martin
  16. I took a look at the original, such depth and detail! Look forwards to seeing the next edit. Martin
  17. Fantastic depth and composition, congratulations. Martin
  18. Chris, Thanks for setting the bar very high on standards! Great set of images over such a wide field. Which narrow-band filters do you use? Cheers, Martin
  19. Thanks chaps, I was looking forwards to a clear week to capture the next panel but it has rained quite hard so far this evening. The difficult decision now if where to go next - left or down ....or order some other NB filters or all ! BR Martin
  20. There are some excellent images around showing,deep wide-field views of the Pelican Nebula. I've just started a project of my own which I will add to through the year. This is the first panel taken over the last three nights. Imaged at F7 through a WO Zenithstar 105mm with Atik 16HR+ Astronomic Ha. 20*1200s auto guided on iOptron iEQ45 Pro Cheers Martin
  21. Here's my William Optics Zenithstar 105mm APO F7 Martin
  • 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.