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astro_dt

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Everything posted by astro_dt

  1. Hi Ed, I think I'm coming to the same conclusion as you that there is nothing to lose! I will probably tell them that I will take it for scrap and then have a go anyway, that way they won't be dissapointed. The link you sent was useful and gave me a few more views of what the C70 might be like. It's low end and so can't be that much to go wrong unless something was broken or it was dropped. Thanks for your help, much appreciated Danny
  2. Hi Ed Thanks for the reply, the truth is I don't really know what the problem is! I was just trying to get some information as to whether it was worth volunteering to try and fix the scope or tell them it's scrap. When I took my ETX125 apart, there was plenty of information on the web as to how to dissassemble the scope and mount. I tried some searches but could not find anything similar for the C70 so I was hoping to get some pointers from someone like yourself who has been forced down the route of repair. Cheers Danny
  3. Hi Harry Where did you get the data for comet Hartley? Thanks Danny
  4. If anyone out there has attempted to take one apart, any advice would be welcome! Cheers Danny
  5. Hi Guys My Son's Scout group have a Celestron C70 Mak that they use for daylight stuff like bird watching and (sometimes) for the astronomy badge. Apparently it's "broken" and they want me to fix it. Can anyone point me to instructions on how to disassemble one? I just want to know if I have a chance of fixing it. Thanks Danny
  6. Thanks Helen, Brian - I think there are some good options and I need to experiment. Danny
  7. Ken - I sent you a PM Thanks to both you and Bill for the quick advice Danny
  8. H all Just working on a PST set up and the best way to connect a webcam, DSLR or a CCD. It will be a shared resource in our Astro Society so we need to cover as many cameras as possible. Anyone out there with a PST that can share their experiences and what they have used? Thanks Danny
  9. Love the bracket ! Made something similar out of old curtain brackets Cheers Danny
  10. Outstanding Let me know the name of the supplier just in case! Thanks Danny
  11. Just thought it worth checking that you have set up your home location in the handset?
  12. Hi Roy I think Kevin's suggestion of calling Ian K is a good one or even try WO direct. You might be able to find a replacement bearing from the model shops (like the RC cars and helicopters). I would think WO use a standard commodity part and not a custom bearing so you might be able to find it. Post the internal and external dimensions of the bearing and I'll look in my scrap box. I keep all sorts of junk and I might be able to extract one from an old DC motor or something. Don't try and use it without a replacement, it will not travel properly. But while you have it apart I would recommend locktite on the brass screws. They had loosened considerably on mine when I took it apart. Cheers Danny
  13. Hi DP Haven't been on the forum for a while due to other commitments and just catching up. Looks like you are sorted out but for future reference the Surplus Shed sometimes have screw in reticles. I went the cheap way and made my own! But a fiver for an eyepiece is pretty good going! Cheers Danny
  14. Hi Roy You have my sympathy as I had a similar problem when my WO66 jumped out of the tripod I was using. I managed to cushion the fall with my foot (worth the pain as the optics survived) but the draw tube stopped moving properly. I found the scope quite easy to take apart and it also easy to work the mechanism out. My problem was a dislodged bearing which I was able to reposition and then reassemble the scope. All is now fine. This advice doesn't come with a guarantee but if you do have a go, you are welcome to PM me if you have any questions. Best of luck Danny
  15. Hi John I have had reflections and refraction patterns when a thin coating of ice has started to form on the outer lens of my camera. Not sure if that's your problem, just a possibility to consider in the current weather. Cheers Danny
  16. Hi Paul Good idea to try and get a faulty camera. You don't need autofocus, light metering or flash. As long as manual mode is working, you don't need any of the rest (macro, sports etc) I would say mirror lock is useful but not essential, likewise you could get away with a cracked or partly working display. Damage to the casing like the strap brackets would be no hinderance. Alternatively Canon do have an outlet shop on ebay where you can get reconditioned cameras. Let me know how you get on. Cheers Danny
  17. Hi AT By coincidence I posted a form of explanation on another forum this morning, so may as well try it here. The effect is known as time dilation and the mathematics comes from the Lorentz transformation but I want to try and paint a verbal picture. Think first about a 2 dimensional world where your speed is limited no matter what direction you travel (North, South, East and West). The faster you travel in the N-S direction, the slower you can travel E to W and vice versa. If you drive North at top speed you cannot travel E or W. Now extend the analogy to the three spacial dimensions we are familiar with, add time as a fourth dimension and set the speed limit to the speed of light. As you travel closer to the speed of light in the spatial dimensions, you have to travel slower in the time dimension. So time slows down as you approach the speed of light. For an observer who is relatively (no pun intended) stationary on Earth time still moves along the time dimension at what we call "normal." Hope this helps and I don't get riped apart for over-simplifying the problem. This is just one interesting way of looking at it. Danny
  18. I nearly bought one of these (and it's safe to ask about the price!-) SterlingXS -Panasonic Toughbook Laptops laptops But I figured it would be too underpowered and not sure about USB2 Cheers Danny
  19. Hi Louis I have a 5mW and it works well. I believe 5mW is also the limit for scientific and eucational use cheers Danny
  20. Hi Shawn I have an ETX125 and I like it because it's portable and easy to set up and align (after some practice). I have some images on my website taken with the 125 but I haven't spent much time on glaxies. It really needs a wedge to get the kind of performance needed for very long exposures. It's not the most accurate tracking but good for the price range. However, if I upgrade I will go for the most expensive equatorial mount I can buy and then have the flexibility to load any OTA. Hope this helps Danny
  21. Hi Kev, I agree with Keith that it sounds like a short circuit (glad it's not your scope). I would be interested to hear what Maplin say as I use similar holders for non astro applications Cheers Danny
  22. Hi Matthew, I agree but not all the earlier versions (350 etc) had the facility to record movies. Danny
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