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Everything posted by EA2007

  1. Thanks, I think my scope needs collimating though, its a Celestron C8 Schmidt Cassegrain. When I focus stars in it there always seems to be a bobbly bit towards one side of the star. Also it focuses okay with the live view on my camera but when the scope is pointed vertical then I think the weight of the camera means it slips a little from the tightening screw that hold it in the EP slot, the screws aren't that great, so I think the image is out slightly of focus, hence the stars not being that pin-point. Never collimated a Schmidt before...I know with Newt's you get the collimation cap but that won't work with a Schmidt will it??
  2. here it is finished: Uploaded with ImageShack.us
  3. Lots of stars at 8% it's working now, thanks guys (& girls), I shall post the image when its done. I use IrfanView for post processing, do you have any other software ideas that would be good ?
  4. ahh, that's where i might have been going wrong...i turned the slider up, so i need to turn it down ?? shall give it a go, cheers : )
  5. Hey all, took 9 shots of M13 last night, plenty of stars visible yet DSS cant seem to detect any so as a result only stacks 1 image....any way to make it do its job properly ?
  6. nice one, good purchase then. the E-400 i had was fine for daytime imaging. just night time shots weren't that accessible. good luck.
  7. they're good : ) thanks for sharin'
  8. yeah, but the 8 minutes is only for an ISO of 100 which for imaging is useless. the exposure ability decreases with higher ISO's from what I remember it went something like this: ISO 100: 8 minutes ISO 200: 4 minutes ISO 400: 2 minutes ISO 800: 1 minute ISO 1000: 1 minute ISO 1600: 1 minute
  9. i'll be trying that badboy out when the weathers good. nice one. planetary kick-*** imaging ahead!
  10. just make sure the thing can expose for longer than a minute at any ISO's higher than 400, otherwise your in for a lot of fun especially if you have a slow focal ratio on your scope. I had the E-400 and it didn't allow for long exposures, i would maybe assume that the E-500 is maybe the same.
  11. It only works on the really bright stuff. I found that out the long way ha ha. Try focusing on something like Capella or Vega or Sirius (if your early enough) then hope that it stays in focus for fainter objects. Does your liveview also show faintish horizontal red/purple lines on it when using it in the dark? mine does, i assume its the same with everyones ?
  12. Evening Simon, I'm sure that you will get some 'technical' replies soon. I'm gonna go down the more basic route : ) Your scope is an 8inch Schmidt right? with thatI should see you having no problems in seeing: Jupiter and the Galilean Moons (or Medici's) namely Io, Europe, Ganymede and Callisto. Saturn and the rings M81 & M82 (feat. NCG3077) Some of the shizzle in Leo and Virgo M51 M101 Other things later in the night such as M13 & M92 in Hercules, these are great star clusters to look at Also M27 & M57 are good nebulae too look at. I assume you have an eyepiece with your scope? Most scopes come with a 25mm eyepiece (EP), this gives a good combination of zoom and field, higher magnification EP's such as a 10mm give more magnification but sacrifice widefield views. I would stick with the 25mm for now, its a good choice for observing. You mentioned a focal reducer....i wouldn't bother getting one unless your going to be using it for astrophotography as they can be quite expensive. I believe focal reducers also widen the field of view, this may be a benefit when looking at open clusters such as the Pleiades (M45) or the Beehive Cluster (M44). Does your scope have a wedge facility built into the mount? i.e. can you adjust the angle to the bas of the scope to allow it to track the night sky in alignment with the apparent movement of the stars. If you do then this will greatly improve your deepsky observing as you will only have to move the scope in one axis. Here's what I mean by a wedge: http://dvaa.org/images/C8Big.jpg If your scope is a goto scope then you should learn to use the star-alignment features, this allows the scope to track the night sky and also locate objects for you to observe..once it has found them you should be able to see the object through the EP and it will continue tracking them for the following few minutes very accurately. Maybe invest in a laser pointer, these things are great for shining through the viewfinder scope to check that your scope is aiming in the right place before you get into an awkward position under your scope, risking broken bones and fractured hips etc : p Also make sure you have a red torch and a star chart at hand, aswell as warm clothes.
  13. Take the 2nd and the 4th stars in the bowl of the plough and make a line between them (a diagonal line in the bowl from the bottom left to the upper right). Then continue this line by approx. 1 1/2 times the distance again and you should end up on the galaxies. You may find that you will see another galaxy in that area, that galaxy being NCG3077. This region of the sky is very interesting for galaxy fans as it shows all three major galaxy types. M81 being a spiral galaxy like our own Milky Way, M82 is an irregular galaxy and NGC3077 is an elliptical type galaxy.
  14. try Voyager 4.5 from Carina Software its semi-freeware i.e. you can use the majority of it for free but the full version (which you have to pay for) has a larger object catalogue. once you have downloaded and installed it it may ask you to register...i just click cancel and carry onto the program. i have been using Voyager for the past 4 years now and its great. once you have adjusted the settings to your time zone and location you can go to the 'tools' tab and click 'Solar System' near the bottom. this will give you an accurate portrayal of the solar system and you can advance the months and days ahead to see what things will look like. it even show cometary orbits and asteroid orbits. another useful feature is the 'Solar Neighbourhood' which can again be found in the 'Tools' tab, this shows the nearest 200,000 stars I think and you can zoom in and out and move around...pretty neat stuff.
  15. if you put a big mirror up in the sky you might be able to get a bit of it : ) lemme check Voyager....yeah, end of July beginning of August, rising in the southeast. Voyager shows the 1st August at around midnight a good time to see it.
  16. wonder who would be first to have the video on youtube ?
  17. lol, I get what you mean, i wasn't having a go to much and i appreciate how much work goes into those programs, especially to cater for everyone's needs and fill an hour etc etc. Just my annoyance is on how the BBC can get away with providing a program which covers too many aspects and doesn't go into enough detail. They should have dedicated an hour to each of the main persons, i.e. that of Galileo, Hubble and Newton. There is a lot more to Newton for instance than his work on gravity, he also worked on spectra and worked in the royal mint along with the Tower of London. They also left out the Babylonians, Herschel family and the actual finding of Cepheid Variables....maybe I should make my own program! : p
  18. hmm, just watched it. not all that brilliant (not dissin the presenter and producers etc) but it was a little back to basics, might have thought with Coxy and Wonders of the Solar System that anymore programs from the BBC on space would be more intricate, tonights program hinted at the olden days of Horizon. Anyway still a good introduction to cosmology through the centuries for the layman. Few issues with it...mainly the presenters pronunciation of Tycho (not 'teek-o') and Johannes (not 'yo-han-nes') Also what happened to the 20/30/40 years after Hubble with the finding of the CMBR (which eventually led to the Big Bang theory) ? Likewise he also forget to mention the small fact that Hubble was accompanied by Milton Humason who did alot of the work and also Vesto Slipher who Hubble might of swiped a few ideas from i.e. radial veolcities! Love the way they always forget to mention the people who did the majority of the work. Should have dedicated the hour to the discovery of the expansion of the universe rather than cram in two of the most major discoveries in the last 5 minutes.
  19. Try a diagonal mirror with your scope for Bode's galaxy and the Cigar galaxy. As for Venus...yeah it appears larger. The smaller the crescent the closer it gets to us.
  20. sounds nice, don't think Wallace and Gromit landed there though. Thanks guys : )
  21. Evening, been out with my Canon 450D noticed on a few of my images a line / scar across the surface of the moon...anyone have an idea on if it has a name or what caused it? Cheers ia
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