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astronymonkey

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Blog Comments posted by astronymonkey

  1. Well Rich, I would say that identifying a problem and then choosing the best solution is a successful outcome, rather than a failure. Excellent work on getting the mirror this far and as you say its better to get john to sort it now before it gets too thin.

    As far as as not doing everything yourself, dont worry as unless you were going to aluminise the mirror yourself there was always going to be a point when you handed the mirror over to have it finished.

    Its a big bit of glass you have there, so when you get a queue forming at the first star party you take the finished scope to then it will all be worth while.

    Cheers

    • Like 1
  2. Hi rich,

    that mirror is coming along nicely so keep at it. A 22 for your first grind seemed crazy when you first took it in but ive got to say your doing a grand job.

    Having moved to the south coast though youre a long way from John Nichol if you need a hand but Im sure you'll manage.

    Nice bike by the way, ive heard good things about boardman bikes but I agree with having the car to fall back on. But being in the south coast youre gonna miss the tour de france in yorkshire which is a shame as it looks like its gonna be a good weekend .

    Keep grindin mate, but be careful of leaving skid marks ;)

    Cheers

  3. From what I gather the main changes from the old to the new ones are:

    Better secondary mirror cell which encases the mirror better and means it is held in the holder rather than being stuck to the stalk with silicone

    Truss poles and the rings on the end of the tubes are painted black to reduce reflections.

    The top ends of the truss poles have a small bracket to hold the top tube in place before its boltedminto position

    I also think at some time in the past they have upgraded the focusser to a dual speed one.

    collimation bolts on the primary have been improved and I think the springs are better.

    in general they are good scopes but like everything they benefit from some tweaks but thats part of the enjoyment.

    Id disagree though about astronomy being a hobby for the rich. Many years ago a 10inch scope would be considered huge and a 12inch scope was something inly a club would have. To say these scopes are now even in reach of amateurs is extraordinary and a good 12inch scope can be bought secondhand for approx £400 which is a lot of scope for your money.

    You will love the lightbridge , its good on planets even with the supplied eyepieces and you can upgrade these as you go.

    Thanks

  4. Im gonna opt for 18inch f4, below that will be punishing on eyepieces and the low f ratios would give too big an exit pupil for me. At f4 I could get away with a 22mm eyepiece and still have a 5.5mm exit pupil, with an 82 degree eyepiece this would give me just under a one degree field so would fit the orion nebula in one field.....only just !

    mind you, if I see you with the 22 at a star party id be first in the que.

    cheers

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