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Everything posted by Joe_L

  1. I had a similar sensation and also wondered if an increase in floaters in one eye. Optician refered for a OCT scan which revealed I had what's called a macular hole in one eye. It's an age-related permanent tear in the retina, thankfully static and does NOT lead to full deterioration like macular degeneration. Luckily for me its in my weak eye. It's worth looking at an amsler grid to see if you can detect any distortion (for me very slight) - this could mean one of several defects some of which are serious. https://www.allaboutvision.com/conditions/amsler-grid.htm Better looked at on paper than on screen I think. any doubts ask an optician about a scan, get a referal or you can pay yourself to get one at a well known high street optician chain. Hopefully you'll have none of these but highly recommend a check.
  2. Blimey I wanna see the scope their keeping in that big shed (top right). Does the roof roll off?
  3. Lovely. I know the area well, it's a great place. (Have yet to finalise family holiday dates before I know if I can come). Joe
  4. I'd be interested, as long as it doesn't clash with having to go to London for a week sometime around then. Joe
  5. 70% orange sky at the moment, very misty
  6. Yes. Back in the 80's I helped a friend make a 3M one (it did get the neighbours twitching the curtains as we started assembling it in the garden). Another friend knew someone who had made a 10M one but he lived on a farm so space wasn't an issue. Chicken wire and aluminium sections - the main issue is getting the geometry accurate enough for whichever wavelength you're intered in. Joe
  7. Hi John , welcome to the group. It does take a bit of practice and fiddling to get the hang of alignment etc. Don't rush and enjoy the learning process..I have a Nexstar 6SE and found this article very useful when I started: http://www.cloudynights.com/topic/385903-accuracy-of-nexstar/#entry4939483 See the post from "Tel" about 6 posts down. Enjoy your new hobby! Joe
  8. Joe_L

    Hello from Leeds

    Hi and welcome to the group from another (armchair-) caver Joe
  9. Drat! That means the fuzzy ball stars I see are just terrible seeing and not anything I can cure with my equipment.....Do you think attaching dessicant to a helium balloon will help?
  10. That's an interesting suggestion, I'll give it a try. My home-made dew strap is a couple of strings of resistors in a wide flat tube of heatshrink which I haven't shrunk yet. At the moment its snugly fitted just inside the top rin above the corrector plate (you can just see this in the photo) . There's enough play in it to change the length so it should be easy to move it lower down. I'll try and let the inner space air a bit as well. Thanks, Joe
  11. The other night my corrector plate on my Nexstar 6SE looked a bit dewy. Very hard to see and only observable at certain angles but I'm convinced this was on the INSIDE. I have a small homemade dew strap (approx 3W) and a foam dew tube but it was quite a cool damp night. In daylight the inside of the corrector plate looks slightly mottled and smeary, a bit like drying marks. Is this from internal condensation then drying again? Would it be an idea to try drying the inside air with a small tube with some silca gel? Would this benefit from dismantling and cleaning? (Ducks below parapet after opening another cleaning thread! Sorry!) Joe
  12. Joe_L


    I agree Steve, that's defo the best plan. Actually when I packed up and had one last glance around I saw a fantastic meteor almost a fireball going horizontally across the south.
  13. Joe_L


    How about buy 4 scopes and point them at eachquadrant then somethings bound to be clear.
  14. Joe_L


    SO what's the best tactic? Point at your intended target and wait for the clear patch to reach it (strange, the clouds keep moving but the clear patch never arrives), or keep darting about to the clear patches and by the time you've located the target the patch has shifted? Joe
  15. Joe_L


    First clear sky since September (and back then I was busy and didn't get to see anything!). Put the scope out, faffed about as its so long since I last setup. By the time the scope had cooled it had clouded over. Some gaps but everytime I aligned and focussed the gap was closing again. Stay put and wait for the next gap or move to another clear area? Things getting fuzzy, even the clear patches are 50% thin high cloud. The garden is very bright in reflected light. Give up and go indoors..... Oh well, at least I got to see M77 and a nice view of Uranus for a few minutes, and old friend Jupiter with a lovely lineup of moons.
  16. Interesting article but seems to miss out on discussing refraction. Excellent picture Tom thaqt nicely illustrates the genuine optical effect of diffraction. The human perception of size of course accentuates our experience of it. Joe
  17. Looks like there are signs of material being transported around the surface -some of the boulders have what "look like" wind-tails you would get on snow on earth, and some of the slopes have similar features or something akin to slumping. P.S. I know you can't judge from one picture with one lighting angle hence the inverted commas. Not doubt this will all be the subject of much analysis. Joe
  18. Just stunning. Utterly stunning http://www.esa.int/spaceinimages/Images/2014/10/Boulder_Cheops http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2007/10/comet_on_8_october_navcam/14963802-1-eng-GB/Comet_on_8_October_NavCam.jpg It's like being there.
  19. Gina> USB is only supposed to work up to 5m without repeaters. JamesF> On a 15m passive cable I'd not be surprised if you run into problems to be honest. USB wouldn't be expected to be reliable over that kind of cable length. I'm using an active cable. Running 2 spc900nc's together plays up even on a short cable. Gina> I tried to get the webcam working but no joy Which driver version are you using? I guess you've already checked that. Joe
  20. Interesting. I tried with two spcs, it almost worked but was unreliable. I wonder if different cameras require different bandwidths. BTW mine was on a 15M cable so that may also have been a limitation. Or maybe depends on the quality of the drivers. Joe
  21. Sounds like a bit of a challenge as I suspect its too faint for a webcam unless it's had a low-light mod done. Just letting it drift past you might find it hard to distinguish it from nearby stars. Are you using the cam with a telescope? Joe
  22. Gina, I had a problem with finding the image using an spc900nc on my NExstar6SE so I added a second video camera as a finder by piggybacking half an old pair of 8x40 bins. With careful alignment and using the crosshairs on sharpcap I can sit indoors and steer the scope remotely, lining up on the viewfinder cam and can take the main cam to the right place. I can share one sharpcap and two serials for scope control and LX mode over one USB cable but the second camera needs a second USB cable as two cameras is too much bandwidth for a single USB cable. Joe
  23. I can get my 6se to focus on objects as close as about 5M. Closest focus is fully clockwise. Normal focus is about 30 or more turns of the focus knob back from this. Are you using the star diagonal? And is everything inserted right? If you have an unusual setup or something changing the distance from eyepiece to the mirror then focus distance will be altered. Joe
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