Jump to content

740427863_Terminatorchallenge.jpg.2f4cb93182b2ce715fac5aa75b0503c8.jpg

Ransu

Members
  • Posts

    209
  • Joined

  • Last visited

Everything posted by Ransu

  1. This may be a silly question, but have you tested how your 1100D handles longer subs without additional cooling? I have used my 600D last autmn, +10C temps and wintertime -20C temps and i dont notice any differense. So i think cooling these new models (1100 and 600) is maybe thing you dont need to do. 1000D shows clearly ampglow in corner, but with 600D i don't see almost any. Of course it's ok if you want to mod your new toys, but benefit of modding may be small:)
  2. Great image! Lots of detail and beautiful
  3. With Canon's own zoombrowser ex program you can do file conversion.
  4. Thanks for info! I have to start think about purchacing Lunt BF1200
  5. Very nice result, lots of details in nebula. I am also interested about sub length and amount of subs.
  6. Has anyone here tried Lunt BF1200 with PST mod parts? Any problems mixing them? I got yesterday good first light with my PST/TAL100RS Solaris/90mm D-ERF mod. (some images in my blog) Otherwise i got amazing views, but original BF5 blocks visually quite a lot of solar disc. I have looked for Coronado BF10 or BF15, not many dealers in Europe i suppose, and even BF10 price seems to be very high. APM telescopes have coronado bf10 and Lunt bf 1200, which seems to cheaper. What you think, would it be ok with my other parts. And thousand thanks for Merlin66 and others about all information you have shared.
  7. Thanks for your comments! It is interesting to follow how comet tails change pointing direction during time.
  8. I took this image 11.feb morning with 250mm f/5 Newton and EOS600D. 52x1min subs. Stacked with DSS comet stacking mode. Temperature was -24C and lot of ice smoke in sky, SQM-L showing 18.2. Dust tail and gas tail showing almost opposite directions now. Image is about 50 arcmin wide, slightly cropped. I hope you like it. I had to reject some images, because of ice smoke clouds spoiling them. Thats why image is missing parts of startrails.
  9. I am using 250mm f/5 Newton with CGEM, total weight with TS 60mm finderquider/QHY5 and canon 600D is about 17kg, so it is possible. I have permanent setup for CGEM in obsy. Sampleimages with this setup in this topic http://stargazerslounge.com/imaging-deep-sky/164436-m81-m82.html
  10. To stack 1100D or 600D raw images in DSS, you need 3.3.3 beta version of DSS. Earlier versions does not work properly with 600/1100D raw, showing only slice of stacked image.
  11. Very nice images, very good prosessing and natural look, i like them a lot. Leo 1 is good catch, i have to try it too, have you tried IC10 in Cas, another dwarf member of our group.
  12. I think you can not succesfully connect Nexquide/synguider to your computer and same time use PHD. Nexguider/Synguider uses internal computer for quiding. It is meant to be stand alone guider, used without computer. I think PC port in Nexguide is for software updating purpose.
  13. Thaks everyone I spend another night with this object, total light now 5h24min. I think i got more galaxy in image, enough now for this object. Weather was quite similar both night, -18..-20C (no need for cooling your DSRL sensor:D) Image is cropped. Full size in astrobin:http://www.astrobin.com/full/4652/?mod=none
  14. Finally we get some clear sky here, i managed to get image of this supernova last night. Weather was quite bad, frozen ice smoke in air, -18C. My SQM-L shows 18.4 when i started and 19.3 when stopped.
  15. Rob, seems that you have quite a lot to handle with nearly 1meter diameter tube
  16. Beautiful timelapse and amazing comet! Thanks for sharing
  17. I think his cat will be out of collimation very soon, looks like that its getting quite a lot of G-forces:D
  18. I had earlier synguider, but i am now using QHY5/PHD. I wasn't happy with guiding accuracy and sensitivity of sensor with synguider. You have to use guinding scope fl 1/3..max 1/4 of imaging scope. And you need minimum diam. 80mm for guidescope, 100mm is better, jus because of sensor is not sensitive enough. Synguider also does not have any graph for guiding, so you don't know how your guiding is performing. Also using synguider handset was very annoying, moving in menus in cold weather was very difficult, pressing buttons was difficult, many times missing your menu because of delay in synguider system. Handset cables in Finnish winter were like 2mm iron wire, you could push your scope with them. I warmly recommend you to save your money and nerves and take QHY5/PHD/netbook road, my guiding is now much easier with them:)
  19. Same issue with 600D, i needed to download DSS 3.3.3 beta untill get them stacked.
  20. Happy New Year 2012:hello2: It was clear here last night, and i took test images from M1 with C8+ TeleVue TRF2008 reducer. 2min subs total 30min with EOS 600D. -5C and icefog in air, corrector of C8 also get frozen from inside! It has been so wet December, raining water almost every day, that my scope seems to get moisture inside, even protective caps have been in place. Anyway i took it inside, and will dry it well. Curves, levels and colour adjustment in photoshop, but havent touch stars in anyway. You can see image here: AstroBin - M1 Crab Nebula (Pellervo_Observatory)
  21. Hello Dave Before test, i recollimated my C8 with Duncan method mask, befor it was little bit off, after collimation so close that i could see with my eyes. I can warmly recommend to make duncan style mask, it helps a lot of SCT collimation. link is in this topic: http://stargazerslounge.com/discussions-scopes-whole-setups/166087-collimation-cpc-800-a.html Seeing was quite bad when i collimate, and it was very difficult to see clearly diffraction patterns. But with Duncan mask, i saw easily little bit out of balance "mercedes" cross, and get it quite perfect. In my earlier test images of Celestron reducer distortion was maybe little worse, but not much. I recheck yesterday distance between Celestron 0.63x reducer and camera sensor and it was 104mm, so it should give best results. I also try to get more images, weather get bad soon, but i managed to get something. I tried with with different distances, 90mm, 114, 124, 134. None of them get good results and all show distorted stars in corners. I downloaded images in same picasaweb album. Interesting thing is that it looks that you can get better results with any other reducer than SCT models. Maybe 0.63x is too much reduction? TS is selling new 0.8x (€€€) and ASA have 0.77 (€€€€€€)models. And their reduction factor's are close to refractor 0.8-0.85 models. I have no experience of those, and they may be superior, but it seems strongly that that it is also possible to use refractor reducers. I will test later how TSFlat and TeleVue TRF2008 perform when taking more images and stack them. (if these rains stop some day..)
  22. Thank you for your comments. I was also surpriced that apo reducers/flatteners worded so well. I will continue this test later with Celestron 0.63x. I am trying to find optimal distance between reducer and camera sensor. If anyone here having experience of good distance, i would be happy to get that information. I have read that it should be near 110mm. Alangee2 was big dissapointment with DSLR size sensor, i will not recommend anyone using bigger sensors to buy that one. Looks that you can get acceptable results with smaller CCD sensors. I have tried to find optimal distance earlier, but did not get much difference what ever distance i tried. Sorry, i dont kno how to make direct link from image to bigger images, but i will add here link to all reducer test images. You can find also earlier test results with my refractors from here: https://picasaweb.google.com/106884738215780458002/ReducerTest#
  23. Hello. I made yesterday some testing with my 12y old Celestron C8 SCT and reducers/correctors. For DSRL sensor size C8 SCT does not give good flat field and for photographic use reducer souds to be good solution. I buyed my first model, Baader Alangee2 abt 3 years ago, but i was not happy with results, so i buy second hand Celestron 6.3 sct reducer in this year. Still i did not get good results, so i decided to do tests with following reducers/flatteners: I have 2"/SCT thread connector, so i was able to test all 2" correctors with C8 SCT. I made testplan, and decided to try everything i have. First i collimated my C8, it was i little bit out of collimation. Testin object was M38 in Auriga, i made focusing with bahtinov mask by using Capella. Testing was done 26.dec 2011 when we finally get some clear sky after waiting 1 month. I used Canon EOS600D, ISO1600, 2 min images. Guided with PHD/60mm finderguider/QHY5 Testing was done with following plan: -C8 without correctors, -C8 and Celestronin 0.63X reducer -C8 and Baader Alangee2 reducer, 2 extensions and Baader short SCT/T2 connector -C8 and Draco 0.8x reduceri (made for refractor use) -C8 and TeleVue TRF2008 0.8x reducer (made for 400-600mm fl refractor use) -C8 and SkyWatcher 0.85x reducer (for 120mm refractor) -C8 and TSFlat, flattenr for refractors -C8 and TSKomakor, komacorrector for Newtonian telescopes. I took crop images mainly from 2 corners and zoomed them bigger in Photoshop. Also some curves and levels adjustments is made to images. C8 without correctors, as you can see, stars in corners looks pretty bad: C8 and Celestron 0.63xreducer. Distance abt 100mm, does not look good at all. C8 and Baader alangee2, "comet generator" 2 extensions and short baader sct/t2 connector. C8 and Draco 0.8x reducer for refractors, refractor reducers can not work with SCT, or can they:rolleyes: Televue TRF2008. Can not work, it is made for 400-600mm fl range, designed to use with short apo refractors. Watch and get surpriced.. Last of my reducers. C8 and SkyWatcher 0.85 reducer for 120mm refractor. OK. Lets try flatteners. TSFlat, made for refractor use. And last one TSComacor, Newtonian coma corrector. Little bit over correction, but still much better than C8 without corrector
  24. Hi Have you check these sites? Thai Meteorological Department - Surin Weather Weather in Thailand in June
  25. i'm using it also, very easy to use and at this moment adding label in images is only way to protect them. I know that Salvatore, developer of that website, has watermarking possibility in his to do list. If you want to read more ,here is topic and introduction of Astrobin in Finnish astronomy forum (in English:) Introducing AstroBin.com
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.