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Erquy

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Everything posted by Erquy

  1. HI Just wanted to share a snap shot of 1 frame of the video: as mentioned above, when I captured the avi, I was not expecting to be able to catch up much out of it, but it turned much better that I could have hoped for. Regards David
  2. Hi ! I spent a bit time on processing: http://stargazerslounge.com/gallery/image/17292-saturn/ a bit sharper (a lot of time spent on wavelet... after spending time on Jupiter, saturn requires really different wavelet settings, so like a new start!), aligning a bit RGB, contract/brightness. Sounds better to me. Thinking about the starting quality of single video frames, I am amazed still to be able to see Cassini´s separation on the right/left (I think?!) and also the different color shades of the clouds layers (much better than from the 1 st processing) !
  3. Erquy

    Saturn

    From the album: first images skymax 102 + DSLR

    1st trial
  4. And yes it was freezing cold, -10 C, I could not stand that long!
  5. Thanks for all comments. Indeed, quite low, especially when you are in sweden. Above was taken when it was starting to go down at 5 am this morning, only 18-19 degrees and I had a neighbor street light almost in the way.
  6. Hi! Thanks for all comments. For sure I am really surprised still of what I can get out, when thinking about many posts basically saying "no go" for DSO with such a small scope/high F on Alt Az . Anyhow keep in mind only 70% of the shots are usable (little vibration on the mount which is not that sturdy and I think main limitation factor for going into longer exposure towards the field rotation limit, - not really an issue on field rotation as soon as I stay from 30 sec and below-). I used a Bahtinov mask for the second one, but still not that easy. I think I need to decrease the subs exposure time to get sharper (when processing in nebulosity, when aligning using high stretching I could see I have quite a lot of subs to take away, maybe only 40-50% are really sharp shots, many does not show sharp round stars -again typically small vibrations, not straight lines-). So I need another 1-2 night to do as many more and more and select further more. I also had good shots on Orion and Pleiades, see my gallery (taken at 15 and 25 sec respectively, again ISO3200), although a bit too much stretched and noise starts to come out also. I could do it more gently to get nicer contrast, but less details I think http://stargazerslounge.com/gallery/member/27995-erquy/ But for sure, I have a nice sky in my garden with little light pollution (although I live in the suburds of a small town -15 000 inhabitants) and all pictures so far taken between -10C and 0 C.
  7. this time, about 36*30 sec ISO3200. Skymax 102 prime focus (f12,7)
  8. Erquy

    M51

    From the album: first images skymax 102 + DSLR

    2sd trial. 36* 30 sec ISO3200
  9. Hi 1st shot to saturn. Skymax 102, Canon ESO1100D, 2.5 barlow. Capture in Movrec *5, 30 fps. 2000 best of 3000 stack in registrax
  10. Hi, 1st trial on M51. Only 17 subs of 30 sec at ISO3200, with Skymax 102 AltAz goto and EOS1100d at prime focus. Conditions were not best. I am more than happy with the result, much better than I could imagine! For sure I will give it another go and this time better focusing and much longer time!
  11. Erquy

    Orion

    Thanks for comments, I am really happy with the results. For the full background: Indeed captured with the Skymax 102, synscan goto Alt Az without any special tricks nor focal reducer or so (Canon EOS1100D at prime focus, using EOS utility). Also pictured taken south-south west which is not best -for comparison I manage 25 sec on pleiades more West-. 15 sec subs exposure was acceptable with about 70% of the pictures usable (and when unusable, typically little vibration of the mount I believe which means the mount is more the limiting factor than the scope itself). Stack in Nebulosity (Deep sky stacker does not accept much of the picturse as I understand it is very sensitive to the shape of the stars, and reject most of them, but above shows still giving a pretty good result when using Nebulosity -selecting alignement points manually). I am thinking to continue adding more data (above was taken during 2 sessions, for a total of 16 minutes). Key is processing and levelling and Nebulosity does very well the job for most part in FIT format (the DDS function is great!) and I fine tune levelling, curves, color, denoising in GIMP on TIFF files (In gimp I also played on a 2 kind of " exposure blends" for getting the core and the faint areas: from the stack in Nebulosity, I only level the basic stack slightly for the core as 1 picture "low exposure" and levelled as much as I can for a 2sd picture "long exposure" -blowing then the core- and I compose both of them to get a nicer overall homogenous picture -which I think can be better made, I am still learning this method and a lot to be done on mask/blur/curves, above is my 1 st trial this route)... At the end of the day, more work spent on processing that taking the pictures ;-) All pictures in my gallery are taken with this Skymax 102 Alt Az goto and DSLR (included planets), I am quite amazed by what this little scope and a basic DSLR can do !!! (I am only starting amator astronomy and get that 1st scope 2,5 month ago). Note that I have the chance to live in almost a non light polluted area, I guess that helps.
  12. Hi I added 6 minutes to Orion and 10 minutes to Pleiades (all iso 3200, 15 sec for Orion, 25 sec for pleiades. For Orion, I also "simulate" an exposure blend: before stretching the level for the core as 1 dark exposure and stretching as much as I can for the fainter part as bright exposure (so not really 2 different exposures, but the principle of blending with mask layer/blur/curves is basically the same and I tried this for 1st time. http://stargazerslounge.com/gallery/image/17221-orion/ http://stargazerslounge.com/gallery/image/17222-pleiades/
  13. Erquy

    Pleiades

    From the album: first images skymax 102 + DSLR

    40*25 sec, ISO3200
  14. Erquy

    Orion

    From the album: first images skymax 102 + DSLR

    64*15 sec, Iso 3200
  15. Erquy

    Jupiter GRS

    From the album: first images skymax 102 + DSLR

    5/03/2013 2,5 barlow + 5* movrec + stack/drizzle in Registrax and wavelet
  16. Erquy

    Jupiter GRS

    From the album: first images skymax 102 + DSLR

    5/03/2013 2,5 barlow + 5* movrec + stack in Registrax and wavelet
  17. and this time with the GRS
  18. Hi below comparison of the 2 barlow. Pictures taken in same conditions through canon EOS1100d, capture in movrec* 5, stacked and wavelet in Registrax in similar way (about 1500 frames out of 2000). SW 2* barlow GSO 2,5* So clear difference!
  19. Hi Another reprocess from the beginning. I prefer that one
  20. Erquy

    jupiter

    From the album: first images skymax 102 + DSLR

    2,5 barlow + 5* movrec + stack in Registrax and wavelet
  21. Hi Thanks for comments. I reprocessed orion, a bit more details.
  22. here they are: pleiades: 21*25 sec @iso 3200 orion: 35*15 sec @ Iso 3200 10 darks, 10 flats for each
  23. Hi, Below my 2sd trial on Orion and Pleiades, taken tonight. I am really pleased with those, really nice improvement from the 1st ones (longer total time, this time in RAW with dark&flats). I guess I just need to take more and more pictures! (note I am on skymax 102 f12,7 and AltAz goto, I know not the best for this!!).
  24. thanks for comments. Indeed I managed to get a bit of the dust lanes and for sure I need more data (only about 6 minutes total exposure here!). I spent quite sometime on Gimp to level out and tried levels on different colors. Levelling on each channel brought up much more than all chanels together. Any suggestion on other parameters that can bring more on such case of galaxy (for example I tried on hue, saturation, but not much differences to bring out, anything I miss as "key" parameters on this object?
  25. Welcome. On advice, I can only recommand what I know, I have a MAK, skymax 102 (f12,7) Alt Az goto. As you don´t seem very familiar with SCT or MAK below my comments Really great as grab&go, compact, light weight, quick/easy install, nice goto function (if you want to take it to your summer house while not having much space with family in a car), really good package for the budget. Can easily accept low/medium quality EP with good results (as compared to f<6-7 which may then require more expansive/sophisticated EP, something to think about on overall budget). Some says SCT/MAK are a bit better in heavy light polluted areas (can´t confirm, no comparison and in my case I have a good seeing). No issue about collimation. Good to have a powertank (I have a SW 7aH) -valid for any goto, motorised anyhow- Excellent and most likely best of any for planets at same aperture (incl. photo -I get better/smilar results with my DSLR taking AVI´s than many other on larger aperture newtonion with webcams); weak for DSO (both visual and photo, but still feasible on bright objects -and I am only a new beginner, started 2 month ago, I did not know anything about astronomy and astrophoto before!). I regret a bit not to have gone for the Skymax 127 (but I already streched my budget to get the 102) The main issue as I see regarding astrophoto for DSO is the mount/tripod which is not that strong (at least with a stronger tripod/mount, it shall still be possible to take 20-30sec exposure time, and simply take a lot of them -I can use about 80-90% of the picture at 15 sec exposure, but then down to 50-60% usable subs if I go to 20-30 sec, too sensible mount/tripod, even before seeing normal trails as expected from Alt/Az). Check my gallery, you see what you can get with that small Az/alt goto scope on both planet and some DSO ( 1 st shot ever in case of Orion and M31 for me in the gallery as we speak, so better shall be feasiable, for jupiter, the nice ones are my latest and not that bad for such a small scope). Regarding astrophoto, count also budget for this (in my case I had anyhow a DSLR, canon ESO1100d which is working also good for AVI/planets, so simply Tring and adaptor to add on, but you may need to go for webcam or astro ccd camera to get best of it) If you have the budget, I would recommand a 6 or 8 inch SCT or MAK on a EQ goto if you look for a compact size and mainly planets (visual + photo). I see a lot of nice DSO astrophoto on 6-8 SCT with focal reducer on EQ mounts (like the C6 or C8-SGT XLT), making SCT/MAK then well all around for a compact size using such focal reducer (personally if I upgrade, I will most likely go for such optio nlike the C6 SGT XLT with a focal reducer 6,8, compact size is important to me). If you don´t need a compact size nor "excellency" for planets , then you have for sure many more choices at lower price, more all around (but then not "excellent" in all sides, need to make choice between excellency in visual or photo and/or excellency in planet or DSO) and you will find a lot of topics on various other options.
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