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  2. Hi Johannes I’m using a SW 250px that I purchased in 2010. Excuse the mess of cables. Just a temporary setup.
  3. I've used TS many times and they are very good in my experience. It takes a few days longer to get the goods but they have been highly reliable in my experience. I would be tempted by this one: https://www.teleskop-express.de/shop/product_info.php/info/p9868_TS-Optics-PhotoLine-102mm-f-7-FPL-53-Doublet-Apo-with-2-5--Focuser.html Stu
  4. Hi all please tell me I’m not the only one who gets freaked out with the messy cables . Any ideas on tidying them up ,Eq5 pro goto din cables are super stiff and short 2 camera cables ( not cooled(yet)) dew heater running to ASIair and then to tri-pod power EQ mod . 9 cables 3 cam/cam/dew strap which need to pass the axis of the mount if asi box mount on stand or 3 eq mod/dew strap/ power if asi box on the scope + the 2 din cables . Any pics with ideas most appreciated.
  5. Alan, Good analysis! I think you are spot on and the voltage measurements show that there is a current limiting resistor in series with the photodiode. Hopefully, Peter's tests will confirm that the relay will operate as required with the IN+ terminal connected directly to the positive rail when the IN- terminal is shorted to ground. It's a nice idea of yours to order a relay board yourself. They do seem useful things to have around. Regards, Hugh
  6. Don't worry Gav, PM sent to Jonk with link to Dropbox files. William Jon. Have sent you a Dropbox link via PM William.
  7. Hello and a warm welcome to the SGL.
  8. Many ED refractors in the range between 80mm and 130mm from TS Optics, Altair, Astro-Tech and Stellavue share the same origin (e.g. 102 f/7 doublet, 115 f/7 triplet, 125 f/7.8 doublet, etc.). The only difference you may find sometimes is the focuser. If I were to pick one of these scopes, I'd buy from Altair as they are based in UK so the shipping cost and the risk of damage during transportation would be the lowest. WO scopes are mostly made by Longpern. There have been a few models with premium optics made by LZOS (FLT123) and TEC (early production FLT110), but otherwise the optical quality is comparable to the above four rebranders. I certainly wouldn't pay extra £400 for the fancy colour paint of the WO scopes when they are new. However in the used market WO are quite competitive.
  9. One of my favourite galaxies and you have it tight focus with good guiding. It just needs more. Don't they all! Olly
  10. Doug, Thanks for posting. Can you tell me the SAO numbers of these doubles. I have my Altair ED 80 on a SW star discovery mount and much prefer to find by SAO number. Id like to check these ones out. Steve
  11. Cheers Gav, that'll be great. I haven't done anything for months due to moving house, so the new to me qsi is still in its box! This time of year is good to get things ready for the new season, and I always look forwards to the perseids in August!
  12. I'm in the OAG category, and have fitted the Orion TOAG. I think I'm going to have to inject a shim of somekind to tighten up the drawtube. Let's see how this goes. It's a shame the focuser replacement isn't a simple process.
  13. Steve this all sounds ominous. Can you please clarify if there is a concern over safety.
  14. Hello Chris - as Helen mentioned I have the Heritage 130P which I use as a quick grab and go but also I take it to outreach events with my Astro Society. I have made a few changes to the scope which you can see on the photos. I have changed the secondary screws to 'Bob Knobs'. I have drilled the main OTA to fit a dovetail so I can use a 9x50 finderscope. Finally, I made a shroud out of neoprene which is secured by velcro. The two photos show it fitted on various mounts - a Skywatcher AZ5 and a standard photo tripod with a geared head for travel.
  15. Reading the first link, the prospect of upgrading the focuser sounds very scary. Appreciate you sharing this, it has tempered my aspirations. Luckily the scope I have is reasonably well collimated - I think. When I rotate the Hotech SCA in the barrel, it moves suggesting that either the Hotech is off center or there's something off about the drawtube hole. Nonetheless, trying to KISS atm.
  16. Today
  17. I'm planning an upgrade from my current mono CCD. Apparently a lot of people go the CMOS way these days, so I consider whether I should follow the trend or stick with the CCD. I'm primarily interested in imaging faint far-away galaxies. I noted the new CMOS cameras from SX, but one thing worries me: They are 12 bit whereas CCD cameras are 16 bit. I know that you gain contrast when processing the images, so does it matter?
  18. Very nice! I prefer those "unknown" galaxies as well. I gave up imaging until it starts to darken again - I'm amazed how much you catch with such a short exposure. Definitely worth the effort. /Thommy
  19. Yes, correct, the important thing I'm looking for is the colour of the mirrored reflection of the lamp and not the colour of the glass. I tried four white light led sources with different colour temperatures, 2 were cool white, (very white), 1 Warm (Like the old tungsten bulb) and 1 inbetween. They all produce a distinctively green reflection of the source in the 2013 B600 and a White reflection in the 2017 B600 S/N 0000. At the moment I'm just trying to gauge if and when there was a change in these filters and if it points to a more concerning issue. I'll probably have to ask the question again with greater clarity. My next post will explain why Steve
  20. nil desperandum . This is the cure all in two parts :- 1. According to Douglas Adams, I quote " 85% of all known worlds in the Galaxy, be they primitive or highly advanced, have invented a drink called jynnan tonnyx, or gee-N'N-T'N-ix, or jinond-o-nicks, or any one of a thousand or more variations on the same phonetic theme. The drinks themselves are not the same, and vary between the Sivolvian 'chinanto/mnigs' which is ordinary water served at slightly above room temperature, and the Gagrakackan 'tzjin-anthony-ks' which kill cows at a hundred paces " 2. https://www.craftginclub.co.uk/join-freeginspecial?om_campaign=omme_de8a9efc-b34_1816_3101&om_send=72c0b67ce098420495697aefbc72fcf8&utm_campaign=omme_de8a9efc-b34_non_members_free_gin_170519&utm_content=freegin170519&utm_medium=email&utm_source=ometria Jeremy.
  21. 23mm Axiom LX is a nice eyepiece. I bought mine used also and used it in my Skywatcher collapsible 8”. For the heavy eyepieces, I found some varying weight magnets I could stick on the bottom of the tube opposite the focuser side to balance it out a little better. 1/4 lb, 1/2 lb, 1 lb, etc Guess that would 115 grams, 230 grams, 460 grams or so by using combinations of the magnet sizes it was easy to balance the dob with heavy eyepieces. Never experienced issues or focuser problems or anything. The 8” Skywatcher dob is pretty hardy. The magnets just allowed me to use less tightening of the tension handle and made movement a little smoother.
  22. so whats the method for getting the offset right?
  23. thanks Paul, im sure we get some action soon mate, sols had to have a little rest after the activity of the past weeks, its getting on a bit . clear skys. mate
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