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CHAMACO

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    65
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About CHAMACO

  • Rank
    Nebula

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  • Gender
    Male
  • Interests
    Everything you can imagine
  • Location
    Spain >1000m altitude >21 SQM
  1. CHAMACO

    Trapezium stars with binoculars

    oh yes, if you split them with binos, time to enjoy your frac all the way... I guess you enjoy very good seeing conditions... I will try next time split Mizar A and Mizar B (14 arcseconds apart). EDIT: I just did the Mizar A-B split. Very clear. No way for the couples forming Mizar A, Mizar B, nor Alcor (yes, in total they are 6 stars).
  2. CHAMACO

    Trapezium stars with binoculars

    Very interesting, so with good seeing you can actually split the 4 main trapezium stars with a 20x80 bins.
  3. Hi guys, just finished a quick observation with my 15x85 binoculars. After enjoying some Messiers and NGCs, just scanned Lepus to spot R Leporis (the Hind's Crimson Star) to enjoy its red color. After that I pointed to the trapezium of M42. For my surprise I was able to split both A and D from C, the main star. As you see in the image, A and D are 12.9 arcsec and 13.3 arcsec apart from C, respectively. I guess the common chromatic aberration of binoculars and the reduced magnification make very difficult to split stars lower than 15 arcsecs apart. Are you guys able to split the trapezium starts with your binos?
  4. Thanks for the reference. Definitely looks like Peter Drew is the man here to build binoscopes. I also know about Matsumoto in Japan. The alt-azimuth mount he uses is really smart, and would work perfectly with the two 6" refractor OTAs.
  5. Thanks for your comments Sapeceboy. That's why I'm considering F6 (the TS refractor), or the F5 iStar which according to reviews looks like something between a normal refractor and ED/Apo. Looks like lower chromatic aberration in these 2 scopes.
  6. Two refractors, one for each eye... My eyes are very selfish and don't want to share views with any binoviewer.
  7. Thanks Mike, could you send me pics and features of the two refractors on sale?
  8. Thanks guys for your input. Definitely the 10-12" dobson binoscope is on the cards, or maybe just one big dobson about 25" when my future observatory is ready. But now I just want to enjoy wide field views with a portable refractor binoscope with the maximum aperture possible. And that means a maximum of 6" or lower, to be portable. Forget binoviews with just one tube, I want two tubes, and focus the two tubes individually.
  9. I'm considering to build a nice all-round wide field 150mm binoscope, mainly to observe DSOs and, why not, some planet observations. The priority is wide field observation with good contrast at 5 pupil exit, and also good contrast on smaller DSOs at 2-3 exit pupil, so I guess the focal length should be 900mm at maximum. I don't mind too much some chromatic aberration observing the moon and planets at 100 X, I'm not aiming higher than 100-150 X for planets. I want this binoscope to be a keeper for life. I'm considering these refractors, and I would like to hear your suggestions and recommendations based on your expertise: (1) TS 152mm F5.9 http://www.teleskop-express.de/shop/product_info.php/language/en/info/p2229_TS-152mm-f-5-9-Gro-feld-Refraktor-mit-3--Crayford-Auszug.html (2) iStar WFX 150mm F5 http://www.istar-optical.com/refractors-ii.html (3) Celestron Omni 150mm F5 http://www.teleskop-express.de/shop/product_info.php/info/p4010_Celestron-Omni-XLT-1590R-Rich-field-Refractor---Optical-Tube-Assembly.html I plan to use high end 2" barrel eyepieces, like Ethos 13 for the 2-3 exit pupil views, and other eyepieces suited for binoscopes (less that 6.2 cm diameter) for the 5 exit pupil range. Which pair of refractors do you think will do the job better and more cost-effectively? I'll consider other refractors you may suggest. Thanks in advance
  10. CHAMACO

    February 11, 2016; 01:00 CET: Brief binocular session

    Nice quick session. I managed another "hole in one" last Saturday aiming at NGC2451 in Puppis. Impresive its orange central star. With bins you can manage a lot of targets very quickly, some of them with a "hole in one".
  11. Good on you Andrew! Agree... better use apertures 70 or higher to enjoy the Christmas trees.
  12. 1st February 2016 (9:00/9:30pm CET) Clear night, semi rural skies in South Spain (my patio). Binocular TS Marine 15x85 with tripod. Nice view today with clear skies of NGC 2264,the large brilliant open cluster with the stellar pattern of a Christmas tree. Amazingly, this very young cluster (only 3 million years) was never included in the Messier list. Nearly all of of its 20 stars are visible in medium size binoculars. 15 Monocerotis is the brightest star of the cluster, and it marks the half-degree base long of the tree, pointing to the North. Through 15x85 binoculars the 8.2 mag orange star on the East side of the tree is easily visible. The wedge-shaped Cone Nebula (invisible through medium size binoculars) forms the apex. Although the southern stars form the tree’s top, they don’t belong to this cluster. That is, they’re not moving through space with the main cluster. 3 degrees North from the Christmas tree, in the same FoV of stars Alzirr and 30 Gem, there is a small asterism (see image). I never read before about this asterism, but this little Christmas tree just jumped in my FoV. It’s formed with just 4 stars, shining at 5.9, 7.6, 8.1 and 8.5 mags. The asterism distinctive stellar pattern reminds a little Christmas tree, mainly after observing the big one. The brightest star HIP 31876 is actually a double star with a companion shinning at 9.3 mag separated just 10 arc seconds. Both of them form the apex of the Christmas tree. Overall, this asterism looks like a nice “little Christmas tree”. The last Christmas tree is just NGC 2232. It’s perfect 45 arc min conic shape reminds another Christmas tree. The blue-white central star is10 Monocerotis, which shines at 5.1 mag. Most of its other 20 stars range between 8th and 10th magnitude. This is one of the nearest open cluster to us. Only about 10 of the 1500 open clusters in our galaxy are closer. In summary, we should enjoy three Christmas seasons per year.
  13. CHAMACO

    got some

    I like the name you suggest: 'Binoculartistas' We are really artists ;-)
  14. CHAMACO

    got some

    With your new binos you can enjoy a field of view of at least 5 degrees. With a 48" dob only 1/4 degrees at maximum. So now you guess where you are severly limited...
  15. M79 is the biggest globular cluster in winter. Just below Orion in Lepus constellation.
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