Jump to content

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.

sgl_imaging_challenge_banner_dslr_mirrorlesss.thumb.jpg.5b348d6a5e7f27bdcb79e9356b7fc03b.jpg

jsmoraes

Members
  • Content Count

    512
  • Joined

  • Last visited

Community Reputation

734 Excellent

About jsmoraes

  • Rank
    Proto Star

Profile Information

  • Gender
    Male
  • Location
    none
  1. Excellent image, with none area with over-exposition. Congratulations.
  2. I have one and I like very much. The quality of image is very good without spherical distortions. Unlike a barlow, if you change the position you don't have changing in its "amplification". Therefore, use of extension will not change the image size.
  3. Thank you Maximidius. Globular clusters are very difficult to capture because of brightness of core. I do my best to adjust ISO and time of exposition to don't blow up the core. I like to see the stars inside of cluster. This cluster seems to be more than a 2D circle. It shows some 3D ball-llike appearance. He is a very nice and beautiful cluster. I would like to have some tool to show the medium separation of those stars. 150 thousands stars in a diameter around 175 light years. Only for curiosity. To have an idea of the separation and compare with the distance of our Proxima - Centaurus. We see the stars very together, but maybe they are more distant than our nearest star. Actually I have no idea how much they are.
  4. I must agree with you ChrisH. The bayer matrix of DSLR "kill" the image. The stars are very large. Unhappily I haven't money to pay for a good mono camera. In my country, Brasil, we must pay 120 % as tax on the price of camera. For example: US 1,000 will be US 2,200 and with cambio around 3.5 ... the final cost is 7,700 ... I earn only 2,000 to live during a month ... so an impossible dream ! Although ... I think that I can say... I did M 15 and Pease 1 ... and with a very modest set of equipments !
  5. OK ! I think I soved the issue ! With more attention I got identify corrrectly the position of nebula. THERE IS NO ERROR on my first photo. I did it very well. The amount of stars and different image scale of photos cause some confusiion. See, below: I was right in 2012, I am righ in 2016, I got capture the nebula. And to finish this false issue... A beautiful veiw of this nice target (that my camera will never will do with that resolution !) from http://www.caelumobservatory.com/obs/m15.html
  6. Thank you for your comment and help, ChrisH. I agree. I am analysing those photos and others that I catched from Internet for at least 2 hours. There are many difference from one to other. Not only number of stars, but diameter and resolution. Actually I am not sure if I got to capture the nebula. I think I got limit the area where it would stay using those photos. But, what I see with my Carte du Ciel using the galatic planetary nebula and UC4 catalogs ... it is very different ... and exactly as my photo !!!! By Astrometry.net my image scale is around 0.63 arcsec/px. As the images below are with size 200x, the image scale would be around 0.315 arcsec/px. Using the ruler tool in Photoshop I find the the blue target as nebula Pease 1... and in a position very different that those others photos suggest to be the area where the nebula would stay !
  7. Amazing is your comments, Rodd. As far as I know, here is a forum, an enviroment to present and discuss about astronomy. If there is an error of identification or any other kind of mistake, here is a place to change information, correct some misunderstanding, and son on. Not a place to play like a kid, or better, as idiot kid ... as you did. In years of 2012 I shot for first time this cluster, and reading about him I saw that it is a special one because he has a planetary nebula inside. I tried to find its postion, and I believed that I did. This year I did a new shot, and very better than the first. I reproduced the position of nebula taking in account the image from 2012. As I am not a kid, and I don't like to play as idiot, I went to internet to verify if the position is wrong. And it is true: the position is wrong. I am finding much difficulties to resolve the real position of the nebula. And for all serious mates of this forum - Rodd not included, of course - I present what I saw. First a comparisson of my photo with 3 others. Second, a try to find the position, and if I got to capture the nebula. Up to now, I haven't conclusion ! It is very hard and difficult resolve some targets inside of photo. Mainly if you work with non astromic camera, like I do with a stock Canon. Some distortion of field and different optics cause different image of the same area if you work with high resolution (image scale). If you, mate, has any idea or suggestion to solve that problem of position, feel free to add any comments. But, warning, only serious fellows. I have no time for kidding.
  8. GSO 305 mm - Canon T3 - 23 x 30 seg (11 m 30 s) - ISO 1600 - OAG - Skyglow filter - Coma corrector 200 % original image scale of Canon T 3 (~ 0.65 arc sec / px)
  9. GSO 305 mm - Canon T3 - 4 x 45 seg (3 min) - ISO 1600 - OAG - Skyglow filter - Coma corrector
  10. I liked very much your photo. what called my attention is the 3 small galaxies at left. With full view mode we can see very well that two of them seems to be in merging state. Good definition of details. Congratulations. I think XiDenoiser can do a good work with noise with NML mode.
  11. Thanks for comments. Globular cluster is very difficult to shot. They have a very bright core, but I got process him well. The stars inside are well solved.
  12. Thanks for comments. You're right Robs, the yellow stars is very nice there.
  13. GSO 305 mm - Canon T3 - 11 x 2 min (22 min) - ISO 800 - OAG - Skyglow filter - Coma corrector
  14. GSO 305 mm - Canon T3 - 10 x 2 min (20 min) - ISO 800 - OAG - Skyglow filter - Coma corrector
  15. And a repro with more careful work on red channel and denoise action Editiion (October, 3): I don't know what happened, but I can't see the photo that I posted here. As my site is on a server that has some problems ... I will let the link to the photo here. http://astronomia-e-astrofotos.1069742.n5.nabble.com/file/n2472/n7293-repro-k9.jpg It is curious, because the link show well the photo. Both photos that I published in this thread disapeared !?!? I tried to re-publish it, but it isn't showed in this message !!!
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.