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laser_jock99

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Everything posted by laser_jock99

  1. I use a company called GFM in Wellingborough for my subcontract water jet cutting work (mainly 6mm stainless but also aluminium). Could be worth a try?
  2. Knowing what I know about coma correctors- it is going to be a case of trial & error. Going through the steps- f3.9 is a fast scope, is the collimation spot on? Check this before doing anything else. Then try different back focal lengths. I have found that the manufactures recomendations are usually not that far off give or take 1mm.
  3. Very sad to learn this. Never met Maurice personally but we had many long correspondences on SGL and other media over the years probably going back to the early 90's. Truely gutted. RIP Maurice.
  4. Very stable air - although the air between the moon and the mountain seems less stable. Amazing all the same.
  5. Astronomy magazine in the 1980's.......Jack Newton, David Malin etc. they were my heros.
  6. .....or worse still cut the negatives in half when sleeving them up!
  7. I used this stuff- Onduline Corrugated Bitumen Roof Sheet - Green (2000 x 930mm) https://www.roofingmegastore.co.uk/onduline-green-corrugated-bitumen-sheet.html Been good for the last eight years or so 1500 feet up in the Welsh mountains ans some fairly extreme conditions..... My approach was to see what the locals use to build agricultural buildings and copy that!
  8. Scotchrome 400 slide film was another one I liked- good red sensitivity. Cygnus
  9. To be fair - some of the refuges I've stayed in were a bit grim particulary in Morroco. Refuge Toubkal had the windows smashed in and snow was filling up the dorm! Looks like it has been completely re-built since I was last there.
  10. Still got my old film cameras would love to dabble again especially with modern guiding. At the end though I was just digitally scanning slides I'd just taken- so thought may as well just shoot in digital anyway...... My Ektachrome 400 Hale Bopp
  11. I have slept outside at up to 12,500 feet in the Alps & High Atlas- but always in a mountaineering capacity and thus properly equipped- hence my warning about the extreme cold! I should have thought about this earlier but a less extreme option would be a stay in one of the hundreds of mountain refuges run by the Club Alpin Francais etc. Typically around 30 Euros per night they are a good option in my experience. I think this is the highest, 15000 feet! No cable car here though- you'll have to walk there. http://www.monterosa4000.it/monterosa4000/rifugi/rifugio-capanna-regina-margherita Nice clear skies at these altitudes though- Mont Blanc as photographed from the Grandes Montets (3300m) at night. EDIT - there are 775 huts & refuges in the Pyrenees, some close to Pic du Midi, but nowhere near as high. http://www.pyrenees-refuges.com/#13/42.9376/0.1409
  12. Great image. It's close to the horizon but the Triffid & Lagoon can be seen/imaged from the UK with a dark enough southern horizon. Here's my widefield effort from Mid Wales.
  13. Prices are a bit steep. You could go cheap and get the cable to any number of ski/mountaineering summits and just 'rough it' up there for the night. It's a quite common thing for alpine mountaineers to do so they get an early start in the morning before the sun gets on the ice. https://www.chamonix.net/english/leisure/sightseeing/aiguille-du-midi Pretty cold outside up there at night though.....
  14. Firstly- make sure you use pre-treated timber if possible. It will have been pressure treated with wood presrvatives already. Avoid any of the water/acrylic based 'wood preservers' at all costs (unless you fancy re-doing the woodwork in few years time). They have a habit of trapping water behind the acrylic barrier and rotiing the wood from the inside! Creocote will do the job but my best experience has been with solvent based wood preservers that really penetrate into the wood. Barrentines, Blackfriar & Cuprinol make them. Different colours are available. https://www.toolstation.com/shop/Painting+%26+Decorating/d150/Exterior+Wood+Care/sd3176/Wood+Protective+Treatment+%26+Preserver+5L/p48655 I used a red cedar colour which I re-apply every 2-3 years.
  15. I tried my F2.9 Newts in suburban skies and was reaching sky fog limit in 30s without filter! I tried with a Ha 7nm filter and that worked okay- but you can use these filters effectively with almost any imaging set up. At my darksky site they can run 20 mins+ (camera noise becomes the main issue then) IMHO this is where they really shine. So it might be worth a try if you can filter and have a modded camera - otherwise your exposures will need to be very short. As mentioned higher up in the thread - you'll have to put up with the foibles of using a fast Newt. However, the 6" F2.9 at least is a very portable instrument and you'll be easily able to take it to dark skies if needed. This is my variant of the Boren-Simon concept using a TS branded GSO 6" F4 steel tube Newt. As you can see it's quite small. The ED80 on top is the guide scope (or the roles can be reversed should I feel the need to image at F7.5.....).
  16. Planning permission. Living on the edge of a National Park I chose a timber construction to fall in the 'shed' category.
  17. You don't need need to convince me of the advantages of dark skies. Dark skies and fast optics are even better! 180 seconds with my 6" F2.9 Newtonian from Mid Wales.
  18. The weather has been disapointing- that's why it's important to have interests other than astronomy that aren't so weather dependant. Dark & raining? Spin some vinyl !!!!!
  19. Clearoutside shows everything is 'normal' for the last dark sky imaging weekend of the season....
  20. I find having the camera/eyepiece opposite to the mount makes the whole thing more accessable. For instance I can easily collimate the scope in it's 'park position', facing the other way it would be over six feet off the ground and possibly hit the sliding roof. When the scope is facing up the camera is over 9 feet off the ground and only accessable by step ladder. Leaning across the counter weights and mount to reach the camera would be even more tricky than it is already!
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