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RichardK

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    Oxfordshire

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  1. Thanks - will centre the hub as I give this a go. The telescope came with a Cheshire collimating eyepiece; I just haven't got as far as trying it out yet. A job for later in the week!
  2. Thanks all, Have already asked my first question and no doubt there will be more... Hi John, I bought a used Skywatcher 200P Dob. A friend of mine suggested that it would be difficult to go wrong with one and that seems generally to be the consensus across the board. Needs a bit of cleaning and adjustment but looks to have good potential as long as I don't mess anything up. Thanks Robin, I'm in the Faringdon area, so not too far away. Will take a look at the Abingdon Astro site, thanks!
  3. Sorry, I should have been clearer - the centre point of the spider vanes (and therefore, the hub) is 3mm off centre. Does this need adjusting before I attempt collimation?
  4. Hi all, I've recently bought a second-hand Skywatcher 200P - my first telescope. I've had some success with viewing the moon, but I think it could do with collimating. Having looked at some other posts on the subject, I've looked at Astro Baby's guide and will be using this when I make my first attempt. I have one question that I'm not clear on - Step 1 in Astro Baby's guide suggests that the secondary mirror should be central. The secondary mirror in my telescope is off-centre (around 3mm off of the centre point). Should I leave as-is and have a go at collimating, or should I ensure that the secondary mirror is perfectly centred first? I don't want to cause myself problems that I'll struggle to fix by trying to do too much first time round. Any thoughts/experience appreciated...
  5. Hi all, Bought myself (and the family!) our first telescope a month or two back, and have been spending a bit of time adjusting and learning ever since. Have spent a bit of time looking in, but thought I'd join and introduce myself as no doubt I'll have a couple of questions very soon...
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