Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

Welcome to Stargazers Lounge

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customise your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

Notty

Advanced Members
  • Content count

    356
  • Joined

  • Last visited

Community Reputation

134 Excellent

About Notty

  • Rank
    Star Forming
  • Birthday

Profile Information

  • Gender
    Male
  • Location
    Staffordshire / LV-426

Recent Profile Visitors

395 profile views
  1. Now for sale rather than swap. It's about 3 year old and Astro modded by http://www.cheapastrophotography.com for dual Astro and Terrestrial use. I don't know the shutter count but it's going to be around 2000 or so max (mean time to failure for these is around 20000 http://www.olegkikin.com/shutterlife/canon_eos1100d.htm) Excellent condition, boxed, spare battery and I also have a mains adapter. £260 UK recorded posted
  2. Something about that one I love. Top work.
  3. Apologies but I have done a search but can't quite find what I need. My new setup is the ASI1600mm-cool with FW etc and having established that it all seems to work, based on some feedback from the people at Star Tools, it appears flats are NOT optional, though I was hoping to get some half decent results without them while i learned the setup, but no I now need to tackle them due to the absolutely vicious gradient and vignetting that seems to be blowing away any data particularly in my OIII and SII (and to a certain extent LUM) stacks. I have a Neumann flat panel, and with my DSLR it was easy to just position the histogram peak 1/3 away from the left (or whatever it was) but I plan on using SG Pro's flat wizard, and it wants a target ADU: So can anyone help with: a. What this target ADU should be, and what is it a function of (e.g. Camera, light source etc) b. Should it be the same for each filter? c. I've heard it said (written) that one flat can suit all, e.g one LUM can be applied to RGB as well, and one HA can do OIII and SII. Any thoughts? I assume this would depend on spotlessly clean filters Many thanks, Andy
  4. Thanks Ken I've just had some feedback from the man at Star Tools which leads me to think I should maybe master some "simple" RGB processing and capture first before jumping straight into tri-colour narrowband. I kind of knew that anyway but couldn't resist, but in any case after his analysis of my stacks especially the LUM, SII and OIII, due to the extreme (and I mean vicious) gradient and vignetting which is overwhelming any signal which could be used for colour, it seems flats are not optional for my setup! I did darks and bias for these but no flats, and I think this is going to be the key to progressing on this. When I'm home I'll attempt some flats and see how terrible they look...
  5. Hey thanks for having a play with that, that does look rather good - can I ask what you did to it? I'm really off-piste with all this, trying different things and sometimes I get a result that looks great e.g. colours but then I find it impossible to replicate and have no idea what I did! It's still great fun. I tried the HSO approach but couldn't get anything pleasant looking out of that. It's all good though, I love your comment about the Ha channel basically putting you in space. For the short (a.f.a.i.c) integration times, I am blown away by the Ha subs from this little camera. Indeed Davey, this is my most pleasing looking process colour-wise. I find Star Tools excellent in many ways particularly noise reduction but for colour manipulation I still have to resort to Photoshop aaarggh.
  6. Very impressive image. I've nothing technical to add as I'm using Star Tools myself and getting to grips with the same camera as you and trying to do something similar but not identical to you on a different target. I tried combining an L channel with my Sii/Ha/Oiii but the L killed the image with noise basically, so like you I tried to use the Ha as L, and binned the other 3 50% and it doesn't look too bad, but despite double the integration times you had (30s x70 each) the Oiii and Sii data is just too weak to get a result like yours, so I think I've ended up with Ha on Ha with a lot of noisy but faint input from the other 2 channels. A key part of the leaning curve for me is to what extent you pre-process each channel before combining for the final process. It's a very interesting learning experience.
  7. I've got a 200PDS which is basically the same scope but a bit shorter and I can get acceptable guided 10 min subs with my 1100d behind a coma corrector, already on the heavy side for an HEQ5 (and guiding is certainly "active" with scary graphs but the stars are round and that's what counts. The key will be a lightweight finder guider. I use the QHY mini-guidescop which weighs virtually nothing with a QHY5L-ii camera.
  8. I have one myself, and it definitely made my DSLR much more sensitive. You configure it for one use or the other by the WB settings, but you need to be aware that it will still give a red tinge to terrestrial images if taken indoors under the influence of tungsten light. You can process it out or use a custom WB but its worth being aware it's not as simple as flicking a switch for Astro/Earth-as-it-worked-before mode. Worth knowing before you do it especially if wife is going to expect the aforementioned!
  9. That is a beautiful image Gina, the depth is awe inspiring.
  10. Never apologise for another M42! Great image, especially the closeup and you've got great detail in the core so respect given. Why can't refractors give diffraction spikes, I love them ;-)
  11. I started out exactly the same as you, and like you, could not resist Andromeda. It gave me such a buzz to see the detail coming out as I learned to process it and my friends and family were blown away at it. Your second go is way improved, especially with the restrained processing keeping the noise down. Keep em coming!
  12. Another crack at the colours, but I seem to have limited scope in Star Tools to manipulate them in the way the Bob Franke tutorial describes, it's not really Hubble but I think the colours are an improvement? Gave up trying to combine it with a fake LUM from the three original channels, the extent of levels of the stacked combo was just too big... I couldn't make any sense of it anyhow!
  13. I just tried using Ha on its own as a luminance layer, but it completely messed up the colouring in processing to an extent I couldn't recover it by changing the colour levels at all. Part of me thinks this is right, as I'm then effectively doubling up on the Ha contribution to the whole thing so I need a combined layer of all three as you say above. However, the Ha subs were so much stronger than the other two (SII almost invisible) that can anyone suggest what sort of stacking algorithm might make the most sense when trying to combine all three? Obviously any kind of average will just end up with something dreadful as would median I'd have thought?
  14. Brilliant! Thank you.