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JimB

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    22
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About JimB

  • Rank
    Nebula

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  • Gender
    Male
  • Location
    north hampshire
  1. I am considering getting an ASIair Pro. At home I use a 13.6V fixed linear power supply with my kit. Has anyone used the ASIair Pro with a 13.6V input. The manufacturers data only lists 12V and a minimum voltage, no maximum being stated. I don't want to buy it and blow it.
  2. I have some fur lined snow boots that are pretty good. Recenly bought some Grubs Frostline 5.0 sub zero field boots which are comfortable and warm, with athin and thick sock combo its like toast. They are wellingtons with a built in thermal break similar to those recommended by Reddoss, however rated to -10c but good enough for here. (Reddoss' boots go to -50c).
  3. I have been toying with the idea of getting one of these too. I'm glad to know it will definitely fit in my Yaris.
  4. If you must clean the mirror use isopropyl alcohol and distilled water. Some suggest a few drops of washing up liquid in the mix as well but avoid those containing lanolin. I use 25/75 mix, (alcohol/water), and pulling medical cotton wool over the surface without applying any pressure. Lastly I rinse with distilled water. Best done outdoors or in a very well ventilated area. Avoid cleaning unless it's really necessary. I hope you enjoy your new scope.
  5. An engineers Vee block is great for this. They can be got second hand from ebay.
  6. Thank you Carastro, I'll bear that in mind when I set mine up.
  7. As no one seems to know I will have to find out the hard way,- just bought one. Maybe I will be able to contribute some help to some one else for a change.
  8. Hello. I am considering getting a QHY Polemaster for my AZ-EQ5 mount. Has any one used this combination and did it work well? Also I have heard that the Polemaster can wash out if light pollution is present, how much of a problem is this? The light pollution is not bad but I have to look over the house to see Polaris and I wonder could overspillfrom it wash out the Polemaster. I would suppose this to in part depend on how wide the Polemasters' field of view is. Any observations and advice would be welcome. Jim
  9. I have been watching the sky glow from Camberley getting worse every year and now the council have installed LED street lights on my road, including one directly outside my house. Just a downward spiral. I did get to see what I was missing whist on a visit to Cork in Ireland. I was staying by the coast in a rural setting when the big storm hit and power was lost over a wide area. We had two clear nights and the sky was breathtaking. It was even difficult to make out some of the constellations in the Milky Way due to the crowds of background stars. Sad that such a view is so rare for us urbanites.
  10. Thanks for the replies, sorry to be so long in acknowledging them but the men with the green gowns and sharp knives got hold of me. As you have had no problems Peter I think I will go with the in situ clean. The gap for the sealant/tape is about half an inch so tape is out. I may yet look at the sealant from the aquarium shop, just in case. Thank you all.
  11. I am about to clean my 16 inch Light bridge mirror, I do it with reluctance but it definitely needs it. I have not as yet removed the mirror from it's cell. Now the mirror is held in place with three clamps to stop it falling forward and is held central by three pieces of quite rigid silicone gel. The gel would need to be cut off to remove the mirror and new gel applied for re-fitment. The gel is more rigid than the type available in DIY shops so I am loath to remove it as a suitable replacement might be hard to find. So the question is is there any good reason preventing the cleaning of the mirror whilst it is still in situ in it's cell? Naturally all would be carefully dried afterwards. I would appreciate some learned opinion.
  12. I went to buy the AZ6 but when I saw it in the flesh and compared it with the AZ5 I bought the AZ5. I also downsized on the scope getting a Wave 115 instead of the 130. All based on size and weight. I have to move my kit repeatedly and take it to other sites and the AZ6 was just too much effort and would probably have reduced my frequency of use. As they say the best scope/mount is the one you use most often. The alignment scope is a bit of a fiddle but bearable. The AZ6 is a very solid and lovely bit of kit though. My advice is definitely go and view them,preferably with a similar sized scope to yours on , before you buy. Whichever you get I hope you get much pleasure from it.
  13. I wanted something larger, but still 'portable', to add to the ETX90 spotting scope I take with me when travelling so I bought the Skywatcher OTA. I have an Astro Tech Voyager mount to put it on. OK the two push the envelope for portable but they are quick to set up and reasonably manageable. Despite the clear days it has been clouding up at night here, until last night. In a limited viewing window I checked the optics out and was very pleased. The stars were sharp across the field and the airey discs showed no problems. It also provided an excellent view of M57. The focussing was nice and smooth with minimal backlash. As commented by others it is a little heavy so I won't risk it on the camera tripod I use with the ETX. The only criticism I could make would be the plastic lens hood for the corrector plate, it's very loose and keeps falling off. There are tabs on it but they are very weak so will not bear much adjustment. Hopefully some Velcro on the appropriate part of the hood will fix this. Long term I'll try to find something metal to use as I have little faith in the ability of It to protect the optics should something knock against it. Overall though I'm really pleased with the telescope and look forward to putting it through it's paces when sky and time allow.
  14. Thank you for the replies gents I will try to have a look at those.
  15. I've decided it's time to replace the focusser on my lightbridge 16. What experiences have you guys had / What focusser would you recommend? And by the by does anyone know a source for the Farpoint knob and spring mod kit in england or europe? many thanks.
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