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Greathouse202

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  • Content Count

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About Greathouse202

  • Rank
    Nebula

Profile Information

  • Gender
    Male
  • Interests
    Other than astronomy, running competitively, cycling, motorcycling, all sciences, school (currently neuroscience), and reading about any of the thing mentioned above.
  • Location
    Victoria, British Columbia, Canada
  1. This look really good, it's getting me excited to get my own equipment some day.
  2. Nice, those look really good! I'll have to keep working at it and see about getting my images that clear, I was having some problems with my phone mounting system, it was a bit to wobbly to focus well.
  3. I've recently been thinking about getting into astrophotography, however as a student the cost of equipment has sort of put me off on the whole thing. However just finished soldiering the once defunct motor in my scope back to life, and wanted to see if it was working, so I rigged up a holder for my phone and pointed it at the brightest object I could find, the moon! Here is the result of about 5 minutes worth of work: There is a lot wrong with this image, but for an afocal image taken with an iPhone and without the benefit of stacking, it came out all right, and more importantly on the basis of this experiment I think it's worth putting a little bit more effort into, and maybe with an app for longer exposures and stacking it could result in a few decent images. Has anyone else tried this? It seems like it might be a good way to indulge my interest in astrophotography until I can invest in proper equipment.
  4. Thanks for all the info, I'm going to bring it to work today (mechanic) and see if I can measure the sagitta more accurately and get better idea of what this mirror is. Whatever the f/# I think it will make an excellent project for the summer. Thanks.
  5. I did a quick and crude measurement of the sagitta with some feeler gauges I use for valve adjustments, and it seems that the .044" measurement is accurate. Which leads me to believe that both of you are correct in thinking the figure labelled RoC is actually the focal length, which as stated would mean this is an f/11 mirror. I guess that answers one question for me, now I just need to figure out what to do with the thing, a 89.5" focal length would make for a simply huge telescope. Is there an advantage to an f/11 8" mirror, it just seems like the resulting scope would be ungainly?
  6. I just got a mirror along with a few other telescope bits from a local guy that was cleaning out his attic. The mirror is 200mm in diameter, and has the figures R of C = 85.9" and S = .044 written on the back of it, and I'm wondering what those numbers mean, I was thinking that if it is a spherical mirror R of C could mean radius of circle, but I'm nearly certain I'm wrong. If any one could give me some more info that would be great, if the mirror's any good it could be a fun project to build a scope around it. Thanks
  7. Thanks for the link, this came in really handy, the scope in question turned out to be a Meade 2080 B 8" SCT (the one with "muli-coatings" and and a 50mm finder), the guy selling wasn't super clear about things, I think he just didn't know much about it, and the scope was not collimated properly, though it was good enough to tell the optics were fine. In the end I was able to get it for a steal due to his lack of clarity etc, which is good since I'm a university student with a tight budget. I did a bit of observing through the scope last night, and collimated it as well as I could given my current lack of eyepieces (only came with a 26mm), the sights even with imperfect collimation were extraordinary and way better than my previous 60mm refractor. Additionally the mount and old school quartz control box work well and should be sufficient for beginning astrophotography some day. All told this may be a bit more scope than I need given the fact that I have only been observing for a few weeks, but considering it cost less than an expensive date I think it will do for now. Once again thanks for all the advice it came in really handy when making the deal and understanding the scope.
  8. Perhaps this isn't the right thread to ask this question, but is there a reason to go dslr rather than ccd or webcam? I was thinking of maybe going the dslr direction if only because I could use it as an every day camera when not attached to my scope...
  9. I'm picking up an 8" Meade SCT tomorrow (hopefully), and my ambition is to eventually get into dong some astrophotography, however before I dive in I'd like to do a bit more reading on the subject, and I was wondering if anyone could suggest a few good books on the subject? I've been reading loads online but a good reference style book, or even better a beginners book would be nice. Thanks.
  10. Forgot to say I'll post back and let everyone know how it goes. Hopefully well, I'm super excited about the prospect of getting a larger scope, or at least larger in comparison to my current 60mm refractor.
  11. Thanks for all the advice, I have been doing a bit of research as suggested and I think that I'm pretty well prepared to give it a look over and determine if there is anything wrong, also I spoke to the owner and asked him to ensure that the scope would be collimated and cooled by the time I get there so I should be able to use the star test (assuming clear skies tomorrow). Thanks again.
  12. I've acquired both of the books that have been mentioned, and been contacting tons of schools, and the news seems to be in my favor. I seem to be relatively up to speed on my math (at least for a beginner and according to the calc needed by the two books in question), and the representatives from the schools I've contacted have been informative and encouraging , so hopefully it will all sort itself out nicely in the end. Thanks again for all the good advice and for pointing me in the right direction.
  13. It seems there are a few questions about collimation, but unfortunately none answer my question, so here is yet another. I'm going to be looking an 8" Meade SCT from the mid 1990's later this week, it's an appropriate price considering it comes with a fair few accessories, and the seller seems pretty trust worthy. However the concern I have is if the scope isn't perfectly uncollimated when I try it out, will I be able to tell that it is poorly collimated, or will it appear as bad optics, and is there a way to tell? Thanks in advance for any advice, I don't want to too buy a scope with bad optics, or let a good scope go because it just isn't collimated properly.
  14. Haha, yeah I plan to do a bunch of that if the clouds ever go away! I'm thinking in the long term, since I figure I'll want something bigger by the fall or so.
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