obsession 12.5 inch dob
Posted 17 June 2013 - 06:21 PM
This is my first post on this forum. I have taken the plunge and am awaiting the delivery of an obsession 12.5 inch dobsonian with DSC. This will be the biggest scope I have ever had and it will be used for visual deep sky observing, and perhaps lunar/planetary observing, (I have an 8 inch F20 MCT from Orion Optics UK for this). I thought long and hard about this before purchasing as I know I could have got a cheaper dob with go to etc. However, I wanted a telescope that will last me for the rest of my life. I wanted a telescope that would be easy to use/move. I have tried using dobs before and the 'sticky' movements have always put me off. I made a 6 inch F11 dob many years ago which worked reasonably well and I suppose I felt a little bit nostalgic and wanted to get back to basics as it were with my hobby.
I guess I am airing out my worries that I have made the right decision. (I think I have), I did not want a larger scope as I wanted one that would be large enough to give pleasing views of DSO's, but not so large that I do not want to use it. (Our local Astronomical Society - Dunedin NZ)has a number of dobs. The 18 inch is a monster and difficult to track with. The 14 inch is much more usable for me (personal opinions here). The fact that obsession state 'buttery smooth' movement and non use of particle board for the telescope is what swung it for me. Anyway, delivery should be in mid July so I shall have to wait and see. I will keep you posted on how things pan out.
Regards and clear skies. Larry
Posted 17 June 2013 - 06:43 PM
Posted 17 June 2013 - 06:58 PM
Posted 18 June 2013 - 02:19 AM
Welcome on CN from the other side of the globe
You made a great decision with your 12.5 Obsession Classic.
Extremely enjoyable/practical scope.
Let us know how it works for you under those fascinating NZ southern skies!
Posted 18 June 2013 - 09:28 AM
Posted 19 June 2013 - 05:33 PM
Thank you for your encouraging comments. You have correctly identified a couple of the reasons I went for the obsession 12.5 inch telescope. I wish you well. Larry
Posted 20 June 2013 - 09:26 AM
Posted 20 June 2013 - 12:18 PM
I think you'll be glad of your decision.
Posted 20 June 2013 - 12:40 PM
You might consider a sliding-weight-on-rail system from ScopeStuff? I use a similar system on my Dob (Losmandy version, borrowed off my old CAT), and it enables a quick, smooth, easy, & infinitely variable method for achieving balance- no matter the viewing angle up/down, and/or the weight at the EP. I use anywhere from light EPs in a Paracorr up to beefy EP pairs in a BVer, and can dial in precisely what i need for balance, anywhere on the sky!
I'm thinking of putting a J-bolt through the bottom of the mirror box and hanging a free-weight there (5 lbs) on fishing line or Velcro or something.
Posted 20 June 2013 - 01:31 PM
Posted 20 June 2013 - 02:09 PM
Posted 20 June 2013 - 10:47 PM
Posted 20 June 2013 - 11:09 PM
Posted 20 June 2013 - 11:53 PM
Posted 13 September 2013 - 05:54 AM
I have waited a while until I have had chance to use my dobsonian. I am pleased to say that it is dlivering views that I never thought I could get with a telescope that size. I have had the chance to go to a dark sky site and the amount of detail in the tarantula nebulea in the megallanic cloud was amazing, it looked almost 3D like (I was using a nebulea filter 'borrowed from an observing buddy"). Seeing structure in nebulea is a new experience for me and as for the star colours, well it has opened a new window for me with my hobby. As an aside, I am so glad I decided on the 12.5 inch size, as it is the max I would want to lug around and assemble. I enjoy being able to sit for most of my viewing. Other fellow amatures at my astro club (Dunedin Astronomical Society) have had nothing bad to say about the telescope or its optics, indeed I have heard comments such as "Ï want one of those for my next telescope".I am sorry I cannot quantify how the telescope performs, but just to say that I do not regret spending my money on it. (I am not knocking other suppliers either, it is just that the look and feel of the telescope is rught for me. Keep well all and clear skies. Larry
Posted 14 September 2013 - 03:22 PM
Posted 14 September 2013 - 03:33 PM
Posted 15 September 2013 - 12:43 PM
Posted 17 September 2013 - 01:04 PM
At 39 lbs the mirror box plus primary is only a pound heavier than some made-to-order 12.5 scope mirror boxes without the primary.
The scope balances very well with heavy, wide, 2" eyepieces and the curved spider is a nice feature. It provides very nice views of Saturn and Jupiter with good image scale, brightness, detail and color. Great eyepiece height for seated viewing.
DSO's are very satisfying with a 12.5". For example, I was surprised at how M37 was transformed going from 8" to 12.5".
To go significantly bigger would be extremely expensive,heavy, bulky and present major transportation and handling problems. The Obsession 12.5 mirror box fits in the backseat of a Corolla.
I've extensively studied other brands and sizes and decided that I did it right the first time with the choice of this scope for my situation and it has a very good price point.
Astro system topped off with this dob:
TV 102; Celestron C8HD; Obsession 12.5
Posted 17 September 2013 - 04:09 PM
I haven't found the need to any counterwieght system.
+1 on getting the handles. Initially I did not, but then ordered up a pair several months later.
I too think this is about the right size. Know another individual with a 15" Obsession and he now wishes he would have got the 12.5".
You will enjoy your scope when you get it.
Posted 18 September 2013 - 12:46 AM
Posted 21 July 2014 - 08:21 AM
Just an update, I have finally figured out how to use my DSC's which came with the telescope. I have invested in the 3 skywatcher panorama eyepieces to go with the telescope and I just want you people to know that my enjoyment when looking through this telescope cannot realy be quantified. The large field of views make for superb vistas. Suffice to say that I laughed out loud on one occassion when viewing the megallanic clouds and our milky way, the views were so detailed and crisp. It has reivigorated my enjoyment at looking at our incerdible universe.
Anyway, if people think that 12.5 inches is not a 'big'telescope, and not able to deliver superb images of galaxies etc, please believe me when I say, one will not be dissapointed!
Thanks for reading. Keep well all. Larry
Posted 21 July 2014 - 05:34 PM
Posted 21 July 2014 - 06:31 PM
A 12.5", for me, hits the magic size/transportability "eutectic" point.