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LongJohn54

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About LongJohn54

  • Rank
    Star Forming

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  • Website URL
    http://www.flickr.com/photos/53011089@N04/sets/

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  • Gender
    Male
  • Location
    Kirkintilloch
  1. I put two of my latches vertical and two at an angle. This pulls the roof tight against my warm room and prevents any movement or rocking when the roof is closed and its windy.
  2. Take a look how I did mine. Disks are introduced half way down page 1 The whole pier assembly is extremely rigid and has never given me any problems. The thick base plate ensures the mount can be bolted up really tight. I'm 6ft 8in tall and my obsy was designed to be the minimum size that I could be comfortable in.
  3. It's looking good for tonight and tomorrow. Two nights in a row Woo Hoo! The rest of the week is normal though. I quite like the new 7Timer integration too (click 'Turn On Experimental Features' at the bottom right of the page). More cloud numbers to compare.
  4. I had a couple of clear nights on 30 and 31 January and captured 10 x 240s of RGB on both nights making four hours data in total. Processed in Pixinsight with a superbios and 20 darks (240s) plus 20 flats per filter all taken at -10c. I followed Kayron Mercieca's calibration steps in https://www.lightvortexastronomy.com/tutorials.html and used Masked Stretch and Colour Calibration to finish. Any comments and processing advice is welcome as this is my second image in Pixinsight. I know just enough to know that I don't know anywhere near enough!
  5. I managed to get 15 x 2 minutes through thin high cloud earlier. It's somewhat brighter than cotak's image of 15 Jan. but still no chance of me seeing it visually.
  6. Thanks for the kind comments. There will be images! Just got to wait for some decent nights though. Sadly Louise, I get the same unclear skies as Glasgow.
  7. Inside the obsy the has been one change. The led bulbs are never more than dim at their brightest. I wanted a brighter light for general use and the ability to take Flats would be useful. I had looked at led panels and priced up some diy options but eventually I decided on a FLOALT lightbox from Ikea. https://www.ikea.com/gb/en/products/lighting/ceiling-lights/floalt-led-light-panel-w-wireless-control-dimmable-white-spectrum-art-40332210/ It was a reasonable price and came with a remote too. I can set the light from dim to bright and the colour from 2700K which is more yellow than incandescent bulbs to 6000K which is a fairly harsh white. The lightbox is fixed at an angle which makes it parallel to the scope so my flats are evenly lit. The scope now has three parking positions; Home, Horizontal and now Flats.
  8. Whilst the plan was for me to build a deck in the garden health events overtook me and it was no longer going to be possible. I have an inherited condition which is monitored each year and my tests in late 2017 showed a significant change. More scans in February 2018 showed even more change and I was advised to take it easy. When your consultant looks you in the eye and says 'No lifting and carrying' it's silly to ignore him. We called in the builders to do the job and this is the result. A maintenance free composite deck and new paving as well. Must say it all looks great and is much better than I could have done. The form work for the deck is actually fixed to the obsy joists (which I had asked not to happen) so the obsy is supporting part of the deck. I'm rather glad I over specified the foundation blocks and joists. Everything is still rigid and there has been no settlement in the last year.
  9. LongJohn54

    Kirkintilloch Obsy part 1

    Build photos of my roll of roof obsy in Kirkintilloch. These photos will form a thread in DIY Observatories.
  10. I've posted a review in the member equipment review section here https://stargazerslounge.com/topic/297146-skywather-eq6-pier-extension-on-a-pier/
  11. Set at maximum height for testing. The extension is built to the same quality, fit and finish as the mount. Once the scope was on and EQMOD and CdC fired up I set about building a fresh point model. My first alignment star of choice is Mizar as it’s easy to find and unmistakeable in the eyepiece. Here I’m just resting my phone on the Skywatcher 12.5mm illuminated reticle eyepiece and you can see that the stars are not small round points. I couldn’t get my phone to focus on both the stars and the crosshairs so I focused on Alcor which seemed to work. Touching the scope induces some vibration which wasn’t there before the extension was fitted. However, it settles fairly quickly. It’s a bit irritating when trying to get finely focused though. An improvement for use on a pier could be made by drilling out the threads in both plates and dispensing with the ball bearings. Then use a long bolt fed through the bottom brake disk, through the extension and into the mount. This should be more rigid than the current assembly. It would also ruin the extension for use on a tripod. I’ll see how I get on over the next few months before deciding whether to do it. One thing has been successful, my back feels better sitting higher up.
  12. The ball race separated. The top plate in place. Both holes in the top plate are threaded for the standard azimuth peg or you can use a smaller diameter bolt if you want to keep the peg for your tripod. The top plate fitted under the mount and the securing bolt tightened. This is the weakest part of the system. Too tight and the ball bearings bind preventing adjustments to the mount in azimuth, too loose and the mount can move on the top plate even when the azimuth bolts are tight against the peg. After my first attempts at installing the extension I realised that this was the primary source of flex and unwanted movement so I was keen to minimise it as much as possible. I eventually decided the best method was to leave it just loose enough to rotate the mount. Then get polar aligned with EQMOD. Then power down, remove all wires and remove the three screws holding the top plate in place. Carefully lift off the mount and tighten up the securing bolt properly. Replace the mount and the three screws and wire up then check whether the polar alignment is still accurate with EQMOD. It took several attempts to get this right as tightening the bolt generally made something move. By the fourth attempt my arms were about to drop off but this was the one that was successful. Polaris remained in the middle of the little circle in the polar scope.
  13. Just checking that the mount’s wedge is in good condition. I use much harder bolts than Skywatcher supply so it’s the wedge that’ll be damaged if I over tighten them. The baseplate is fractionally inset into the tube so that the tube rests on the brake disk. Once tightened it makes a very firm connection. The view inside.
  14. Off with the mount. As you can see I use a bolt as the azimuth peg. The bolt head is too large to fit inside the tube. Five minutes with a hacksaw and we have a half head bolt. Using the off-cut bit and a ring spanner it was easy to tighten up the bolt. The extension top now fits nicely into the tube.
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