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Tinners

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Posts posted by Tinners


  1. I have managed to remove the drawtrube adaptor ring and measure it..

    It comes in two parts.

    The Lower part screws into the draw trube and has an outside thread diam of 59.6mm (2 3/8") . It has two thumb screws which locks

    to a plain sided dovetailed upper section. The lower section hole dia is 56.8mm and the upper section (dovetail) is 56.6mm

    The rest of the upper section is solid with a 1.25" eyepiece holder.

    I want to replace all this with a "59.6mm to t2" adaptor.

    Would a vixen 60mm to t2 adaptor fit this? Link  


  2. I think most people would be able to find a helical focuser with a standard 1.25" nosepiece without too much effort.

    I'm looking for an Adaptor which will fit the Drawtube of a standard Celestron NGT focuser and will allow me to attach a baader (T-thread to 1.25) helical focuser

    for fine control. 

    I dont want ...drawtube  >>  standard celestron drawtube to 1.25"  adaptor >>  1.25" to 1.24" baader helical focuser  >>  eyepiece.

    but ,,, drawtube >>  UnKnown >>  baader (T-thread to 1.25") helical focuser >> eyepiece

    Does that make it more clear? The silver part is the drawtube ..i would like to attactch the baadder t-thread-1.25" helical focuser directly

    to the drawtube preferably without using gaffa tape....

    1.25%202%20rack&pinion%20focuser261.jpg


  3. I Used a key, stairs and a pair of legs .....

    We saw some people on the castle mount. They must have had a good view too.

    Much better place to be than lugging Camera,telescope and two tripods up 60 steps!

    • Like 1

  4. I just use a length of plastic tube clamped to a table with the collimator inserted into the end.

    This is an easy way to deal with odd shaped Collimators

    The main problem is the right - tight fitting - tube diameter

    Vacuum cleaner tube of some makes are the right size or else

    ABS 1 1/4" waste pipe (36mm external dia) is the dogs bollocks ....


  5. How about taking it apart and cleaning regreasing etc ...... excellent artical by Astronomy Boy: CG-5 Mount Improvements

    Also noted from Jim Priors astro blog that he had much improvement in quietness of the mount after following the guide.

    At maximum slew speed (Rate=9) the Dec axis in particular was previously fairly noisy and graunchy when accelerating/decelerating, whereas now it is much less graunchy-sounding, and has a much nicer smooth noise, less mechanically strained, and more servo-electronic.

    Likewise the RA drive seems very much smoother, and definitely quieter at high speed, and almost silent when at sidereal tracking rate


  6. If either bolt gets bent so that It can't be removed at all then it is possible to bend it back.

    If you view from the base hole you can just about see the bolt with enough light shining down it.

    Turn the bolt so it curves upwards (towards you) and hold it in position with a spanner. Now slowly drive a threaded bolt down the mounting hole and bend it back

    to "straight"

    Eventually you will get it straight enough to remove the latitude bolts...throw them away and get new ones.


  7. Intrestingly the £8 charge from parcel force is for an unsolicited service. If customs and vat is paid then parcelforce don't have the legal right to hold the mail.

    All they can do is sue for the civil charge but in the mean time they commit a criminal charge of unlawfully withholding post. So you can go down to the police station and make a statement and bring charges against them unless they deliver your parcel.

    The system would be much better if you could just pay HM Revenue & Customs Direct...something that you would have thought would be so easy to do given the current electronic payment technology.


  8. As a rough guide, the cost delivered is going to be the same figure in £ as it was in $.

    Cost + postage + Duty (1.04) + vat (1.175) plus Parcelforce charges (£8) to collect from you any duty or vat owed to the Customs.

    So if you buy $250 worth of stuff + say $50 postage ..

    $300 -> £190 + £8 duty + £35 Vat + £8 Charge = £240


  9. Just had the quote back from my electrician for installing 16 sockets and 2 lamps in my obsy, he has quoted for 16mm 3 core armoured cable, does this see overkill to anyone?

    I suppose the real question here is what exactly are you going to run off 16 sockets?

    If your going to have bar heaters, A kettle and TV screens etc as well as Telescope drives and laptops ...its all going to mount up to a lot of electricity.


  10. Is it just me or is the current popular design of finder scope mount - the one with two rear screws and one spring loaded pin - a very poor design.

    Just one slight knock and its out of alignment. I'm sure a few other members have had similar frustrations so does anyone have a good fix for a wayward finder?

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