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About JG777

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    Proto Star

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    Astronomy, Hiking, AG brewing, Photography, Sleeping.
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  1. Aircraft at high level are in cruise anywhere between 27000ft and 38000 ft perhaps six or seven miles and you won't hear them or see them from the ground, you won't see the anti collision or nav lights either. Most of these lasers easily shine 10 miles or more from what I'm told. Maybe use a flight tracking app like flight radar 24 to check the airspace before using lasers. The airline I work for gets countless reports of laser incidents all the time and not just at low level and maybe some of those are by accident as well. I have seen the reports of at least 2 crews recently declaring a PAN for laser incidents, and many other less serious events but enough to have crews request an abeam routing to try and avoid. This is in UK as well. I can see some poor innocent astronomer getting the finger pointed at them one day for something down to somebody else.
  2. Yes, excellent point ,they could be good choices for the OP, 51 glass will likely slice something off the cost. I haven't owned one myself so cant comment. It's difficult to assess without trying different scopes and I can see why many of us can make mistakes when choosing. Personally I kept my 80 equinox for travel and added a VX 6 1/10 for a mid range scope and it really is a great performer on wide, planets and moon for a third of the cost of a 120 APO. No CA in them mirrors!
  3. There are filters that claim to reduce CA, I never tried them, the Baader fringe killer is one I believe. Most reports I recall didn't rate them very much. I would say the only real gauranteed solution to CA is a healthy credit card waved at an Apochromatic scope. or save for something better. A second hand semi apo like an ED100 pro can be had second hand for good prices, or even the 120 version although they come around a bit less than 100s.
  4. I had a 120 for a while and as a wide field scope it would serve you very well, that is the scopes strong point. For planets and bright objects the CA was too much for me but it didn't stop the scope revealing good detail, and you may find it acceptable. It was in competition though with the ED100 pro I had at the time and that was the nicer scope . Forget the mount though an AZ3 just isn't robust enough for a 120 and there are better options. Think carefully before you choose, measure twice and cut once.
  5. Altair Sabre AZ,clamp and bar

    Thanks for the link, yes the AYO is top notch, a delight to use. I waited 6 months for mine as I think Beat was very busy at the time. Having said that the Sabre is extremely good as well it's just that I wanted an encoder option to see more things 😃
  6. Travel Combo

    I'm taking an Equinox 80 when I fly to Dublin later in the year it fits into my Brompton C bag which spends more time on planes than it does on my bike. However this is easily carried on board and the scope is delightful to use. Tripod and mount will go checked in suitcase, though I have the Manfrotto tripod which closes to 45 cm and capacity of 7 Kg, but not decided on mount just yet, possibly a GTi or something with encoders so I can use the Nexus DSC.
  7. Hi Price reduced to £180 Since getting an AYOII my trusty Sabre AZ has sadly become redundant so am offering this complete set up now reduced to £180 originally priced at £195 plus postage, or buyer can collect. Sabre AZ mount, Altair Vixen clamp with M6 screws, counterweight bar. All in very good order with only slight signs of use. Payment by bank transfer.
  8. Looks decent Alan, does it have any other compartments for bits and pieces?
  9. Very good news, will be my option later in year for a visit to the emerald Isle.
  10. From what you describe particularly as you mention travelling with it in a backpack and notwithstanding you will require other components including mount head it seems to me that practicality and portability must over rule advantage of aperture. Therefore if this was me I would choose the 6 inch over the 8 simply because you will do more astronomy with the smaller scope if it's easier to transport plus your mount requirements will be reduced as well.
  11. In the latest issue of S&T more depressing news about the latest research on LP which I think many of us suspected as the continued roll out and take up of LEDs gathers pace. The article mentions measurements between October 2012 and October 2016 measuring the change by VIIRS the first ever calibrated satellite radiometer designed to measure night time lights. It goes on to say the instrument covers a higher spatial resolution than ever before enabling scientists to monitor down to a neighborhood scale rather than city or national scale providing greater accuracy than previous instruments. It goes on to report the planet brightened by 9.1% with annual increases of 2.2% Some areas remain stable, others are increasing year on year with the only reduction being in war torn areas. The trend may not be unexpected as it suggests artificial light is indicative of growing wealth and population however more disturbingly the transition to LEDs is not counteracting the effect. In other words cheaper lighting leads not to savings but more lights. Not just bad news for astronomers but wildlife suffers as well. Sadly it does not end there , the article states the measurements are likely to be underestimates due to the wavelengths under 500 nanometers so not picking up the blue light which the atmosphere scatters. Anyway as mentioned the article is in the latest S@T for those interested.
  12. The BST starguiders supertest!

    I have the 8, 12, 18, and 25 and the 18 for me is the best of the bunch for general use. The 8 is good in all my scopes and performs better than my ES6.7 unless seeing conditions really clean up then the ES jumps ahead. But yes a great range of EPs for a decent price, to be fair at longer focal lengths you might not need to spend much more.
  13. It fell over!

    What sort of focuser is it? Most have tension screws which may have come loose.
  14. Nexus push-to?

    Basically its a system that allows you to manually push your telescope to a pre selected target in the night sky. For your dob 200 or 300 you would need the required encoders which are small disc like units which are fixed to your mount one for Alt and one for AZ. The encoders send the position signal via a cable of the mount into the Nexus computer and arrows are displayed to direct you to push the scope to the correct position to view the target. You can if you prefer use a tablet connected to a Nexus non display unit for choosing targets. Think of it as a semi auto or even semi manual set up rather than full GOTO. The systems are not that cheap, full GOTO is normally cheaper! The pros for people that like them ( including me) are simple and accurate way of finding targets without needing battery power ( except your phone, tablet or pre charging the built in computers battery) operating in complete silence so very good if you have easily disturbed neighbours and with the Nexus DSC a huge range of options to tailor your observing habits with the ability to add you own observing lists. My grab and go setup includes Nexus DSC to help me travel light and find objects in LP skies. For me it has significantly improved the amount of objects I see on my short sessions and removed the frustration of missing objects or not knowing if it was LP preventing observation But...its not for everyone and your mileage may vary. Push to, does not replace GOTO or complete manual, it is just a different way of doing things if it works for you and your circumstances. This is a pic of my grab n go, A Nexus DSC on AYOII with encoders, UNI 18 Berlebach tripod and a Orion Optics 1/10 PV 6 inch reflector.