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gorann

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gorann last won the day on March 18

gorann had the most liked content!

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About gorann

  • Rank
    Sub Dwarf

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  • Website URL
    http://www.mn.uio.no/ibv/english/people/aca/gorann/index.html

Profile Information

  • Gender
    Male
  • Interests
    Astrophotography
  • Location
    Värmland, Sweden (59.77 °N)
  1. gorann

    M101 LHaRGB 30 Hours

    In PS these halos can at least be suppressed easily using curves selectively. First check the sky background lightness with the picker. In this image it was about 30/30/30. Then anchor the curve from 30 and below. Then bring down the brightness above that point (but less in the brightest part of the histogram so the star will still shine). Then use the brush tool on the curves mask and only apply the curves selectively to the stars with halos. This was a 5 min job (but maybe a bit quick and drity - but works as a demonstration).
  2. gorann

    M101 LHaRGB 30 Hours

    I really like this image, with a lot of detail and nice Ha regions standing out! If I should have some comments I also think it is a bit too pink, even in the last version. The big star to the left looks a bit odd, possibly being affected by some optical shortcommings (the halo being squarish in shape and with colour artefacts) so maybe just get rid of it by cropping the image, which would also move the galaxy towards the centre. Just a thought....
  3. gorann

    ZWO ASI 178MC - IR Cut protector

    Another reason to cut out IR and UV is that refractors (and probably the correctors for reflectors) are optimized for visible light and IR and UV will be out of focus and blurr the image.
  4. gorann

    How good is this?

    Yes Olly, I obviously see the reason why you do not want to hang anyone out and I think Wim elegantly gave me a hint of what you talk about by pointing towards an image from the PI site - so no one to blame.
  5. gorann

    M51 - 30 hours

    Intriguing amount of dust you captures around it. Congratulations! Very dramatic, to me it looks like you caught it in a storm with a strong wind from the east.
  6. gorann

    How good is this?

    I can see what you mean Wim in that PI tutorial image - looks quite artificial. I guess I get a better feeling for the effects and limits if (when) I start playing with HDRW.
  7. gorann

    How good is this?

    Wim @wimvb& Olly @ollypenrice Since I am primarily a PS person that has never used HDRW in PI so far, could you show me (e.g. by a link to an image) what this HDR mania looks like, so I know what to avoid if I try HDRW. By the way, can HDRW be used on images that have been non-linearly stretched (i.e. can I try it on some of my finished PS images)?
  8. gorann

    How good is this?

    There is even a youtube video about the place, which seems to be a site specializing in hosting remote obsies (see http://obstech.cl/)
  9. gorann

    Help with Focusing please?

    Wim would probably say yes, and I am quite sure it is 12.5 mm you need. Field flatteners need a specific distance to the chip, in your case 55 mm. I would guess that 12 or 13 mm would also do the job, but the further you get away from the ideal distance the more curvature you will have (oval stars in the corners). Teleskop Express is a good sourse for spacers.
  10. gorann

    How good is this?

    Here it is: http://www.cielaustral.com/cielaustral.php
  11. gorann

    How good is this?

    Stunning! Unfortunately it is too low on the horizon here for even a half decent imaging attempt. If I get it right it was aquired from a remote obsy high up in the mountains in Chile, which may have helped a bit. Is it a mosaic? Otherwise 109 hours must be close to a record.
  12. gorann

    Optical resolution in DS imaging.

    Thanks for that Mark, amazing image that tells me that I may keep my 11" SCT and I bet against Olly comming up with something similar with his 4" refractor and minute camera.... By the way this is what M51 looks like through a 2 meter RC - 3.6 hours of data that I processed from the Liverpool scope recently so aperture cannot be totally ignored
  13. gorann

    Optical resolution in DS imaging.

    Olly, the result of your experiment will be very interesting, and I am slightly scared. Maybe it will tell me that I should sell my 11" EdgeHD before I even have had a chance to use it and buy a cheap small pixel camera, if there will be a market for large SCTs after your experiment......
  14. gorann

    Abell 61

    Yes, that is lovely ideed. I assume that central blue star is what remains of that exploding star.
  15. gorann

    M110 reworked

    Very nice, interesting and unnusual image Wim. You are obviously keeping up your processing skills over our bright summer. I should get onto it soon but I have taken a break to enjoy the fantastic early summer we have now here in Sweden. 30°C here today. I have some stuff to process when the normal rainy summer weather returns.
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