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Ransu

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    209
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34 Excellent

About Ransu

  • Rank
    Star Forming

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  • Website URL
    http://pellervo-observatory.blogspot.com/

Profile Information

  • Location
    Imatra, Finland
  1. Very annoying.. Supernova was clearly available at april 22 when i imaged M106. I was processing my image with color data from other image and avercooked central core of galaxy in image. I processed luminance data again when i saw this topic and Supernova clearly was there.. https://plus.google.com/photos/106884738215780458002/albums/5617786746204763793/6018507289120895058?pid=6018507289120895058&oid=106884738215780458002&authkey=CPPElJC83IT7Iw
  2. SN2013C in NGC7331 from yesterday. It is abot 15 mag now. weather here was crispy -15C. I took this with C14, optec 0,5X reducer and Atik 460EX. 29x30s with Idas LPS filter, no guiding with EQ8.(phd crash every time i tried with new ASI120mm)
  3. China has never been focused to make quality, their target is to make money. Chinese are very focused to cut production cots and add profit, if they can find cheaper subcontractor, or add profit by changing to cheaper parts, they dont have problem to do it. I dont know do synta make these mounts and do they really have own factories, or are they just engineering company controllilg procuct design (copy) and subcontractor chain. I got my EQ8 at early october and so far it has been work guite well, exept goto accuracy/ alignment with hand controller is poor. I am using C14/Atik 460EX/optec 0,5X combo and imaging area is guite small 17x21 arcmin. With handcontroller i had great difficulties to get object in imaging field with goto and i am now using eqmod and CdC, and can live with that. I have to say that Goto accuracy with Cgem was better than with EQ8, and Celestron software is lightyear ahead of Skywatcher version. I would rather use handcontroller with gotos, but now i have to use computer. It is like lottery with these chinese products, if you want to be sure that you get what you paid for, you have to 3-6X your budget and take different, European or US manufacturer road. (ASA, 10 micron, paramount, astrophysics, Mesu..)
  4. I was able to catch this one at morning (abt 5:15 utc), TAL100RS/PST + ASI120MM camera.
  5. Sorry for late response, i was using about 109mm spacing from thread of flattener to sensor. I haven't try other spacings.
  6. Thanks Pat, Tony and Davo I did not observe this visually, because i was imaging other objects too. I watched this visually couple days earlier with my friends 250mm Dobson. Guite faint with small tail, but observing place was not very good, too much light pollution. Tony, Image is taken 4:16 local, Finnish time, located 61d09m N 28d44m E
  7. I have been follow and took few images of this comet in this month, it is in easy place to find in Big Dipper, and this morning it was only 8 arcminutes from alfa UMa, Dubhe. I took this image in freezing -24C temperature with C14, reduced with Celestron 0.63X reducer, ATIK460EX mono, bin2. 2 min single image. And undersize CGEM in permanent set up in backyar obsy. Merry Christmas and Clear Skies for 2013 with this Cristmas star
  8. I have took some test images with Megrez 90/ Canon 600D and several flattener/reducers. TS Flat works quite well with every scope i have test, also with Megrez90. You can find test images from here. https://picasaweb.google.com/106884738215780458002/ReducerTest Folder includes total 49 test images with several scopes and DSLR
  9. Good start is check that 3 locking screws of losmandy "head" between head and dec ax. in mount are tight. I had problem with them earlier and get same type of problems, missed object maybe 0.5-1 deg after alignment. Screws were loose and heavy scope makes head move. I have one image here, (language is in Finnish) https://lh4.googleusercontent.com/-pqh_bMx1j3A/T3KT6V-0HiI/AAAAAAAAHqM/AStcJDHtRe4/s640/Picture%2520026.jpg
  10. It looks DIY acromatic objective, and if its any good, for f/15-16 it should not show almost any false colour in normal use. Distortion and false colour may be effect if you keep eyepiece out of optical axis, i think it can happen quite easily with chair testing method. It is difficult to say anything of quality, i think you have to find tube for that and try again, or make testbench of wood. With 2,7m focal length it will be real beast to handle, mine DIY achro is only 145/2250 .
  11. Hi Mick, rope pulleys are from local hardware/tool company. Price was 8€/pcs. They are made of composite material. Link, jus show better image, sorry no english option on website..http://www.biltema.fi/fi/Veneily/Asennustarvikket/Koysipylpyra/Koysipyora-254680/
  12. My Doctor Snuggles manual version. Cheap boatwinch and welded piece of plate to make 2 rope chambers.
  13. Very nice images, i have also imaged this comet few times with C14/meade 0.33x reducer/ATIK16HR. It's a nice comet, let's hope that following year will show us more spectacular ones:) If you like to check, i have added my observations in "Taivaanvahti" , place is new Finnish head Astronomical association Ursa's observation collection database. (sorry, no English option on website) http://www.taivaanvahti.fi/observations/show/8423#3
  14. Thanks Xplode, that LX200 16" is great telescope I have added some test images to my picasa album, with C14 (my main istrument now) and also with Megrez 90. https://picasaweb.google.com/106884738215780458002/ReducerTest#
  15. I have also find myself more and more interested about spectroscopy. So far i have been in astroimaging, but i would like to start something more serious. Star analyser grating could be good start, can you more experienced recommend software, RSPEC, visual spec or something else. My available telescopes: C14, C8, Equinox120, Megrez 90. Cameras: ATIK16HR, ISDFK21 AU618, QHY5. This spectroscopy is new field for me, and maybe i have to start by reading some books of spectroscopy.
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