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Astrofriend

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Everything posted by Astrofriend

  1. Astrofriend
    I and my girlfriend was out in the forest and looking for Sweden's ancient history. We found what we looked for, but also something totally different, three old observatories. That's the observatories that was mentioned in the text about Swedish old observatories, translated to english by me. We had already drawed plan to visit this observatory, Tamm's observatoru in the future. But didn't expect to find it here. Some photos from this lucky day and information I have collected: http://www.astrofriend.eu/astronomy/observatory-sites/tamms-observatory/01-tamms-observatory.html /Lars
  2. Astrofriend
    Hi Carl, Do you have any plans for a medium format lens and astrophoto ? You answered in Swedish, how it come, from Sweden or ? Lars
  3. Astrofriend
    First light with the Pentax 645 300 mm ED f/4 lens. http://www.astrofriend.eu/astronomy/astronomy-photo/galaxies/m101/m101-galaxy.html Click on the image to bring up the full resolution image and inspect the corners. Look very good to me except one of the corner. This old medium format lens is impressive. There are not many old cheap medium format lenses with ED glass elements, they are too old for that. The never APO medium format lenses are very expensive and have electronic aperature and focus which can be complicated to use in an astrosetup. /Lars
  4. Astrofriend
    Another little small helping device, a viewfinder cover for the DSLR camera, still a prototype but can be used. This is how I did it: http://www.astrofriend.eu/3d-printing/viewfinder-cover/01-viewfinder-cover.html My smallest 3D-printed device yet. /Lars
  5. Astrofriend
    My Canon 300 mm lens setup is ready for some test in the night, I have already done some test in the opening of the clouds and could see that it works very good. Now I planning for my next 300 mm lens, the Pentax 645 medium format f/4 ED lens. The last days I have 3D-printed two tube rings. It feels very stable and I hope it will not fall apart during the night. This is how they look: http://www.astrofriend.eu/3d-printing/pentax645-300mm-bracket/01-pentax645-300mm-bracket.html Only the 180 teeth pulley missing for the motor focus. /Lars
  6. Astrofriend
    Ikea tape doesn't solve all problem. I had developed a new version, 4.1. This construction is much more stifer. Now the backlash should be much less compare to earlier version. The last changes, page 8: http://www.astrofriend.eu/3d-printing/focus-motor-bracket/08-focus-motor-bracket.html It needs some practice to work with 3Dprinted plastic, later all this supports to get it strong enough will be there from the start. /Lars
  7. Astrofriend
    I bought two new dew heaters. They are sold to be used on camera lenses and powered from USB. I have modified them to reduce the power from 8 Watt to 2 Watt which will be enough for my demand. Some photos and documentation from this project: http://www.astrofriend.eu/astronomy/projects/project-heating-band/05-project-heating-band.html This will be battery operated and I try to reduce the power consumtion of the equipment. /Lars
  8. Astrofriend
    After a copule of year my Star Adventurer got broke, the mini USB contact disappear and I got a hole in the chassi. I didn't do anything about it first because I can use the mount without this USB contact. But today was a good day to try to repair it. My documentation of the reapir: http://www.astrofriend.eu/astronomy/projects/project-star-adventurer-repair/11-project-star-adventurer-repair.html The small connectors of the mini USB get it very difficult to solder. Anyone else that got this problem ? /Lars
  9. Astrofriend
    Do you booth use the latest version, 0.19 ? I found it work much better than the 0.18 I had earlier. /Lars
  10. Astrofriend
    That's the small thing that makes it. Today I made a holder to the temperature probe I use to my motor focuser. I didn't attach it direct to the lens but to the dovetail. Normally I stripe small devices in place, but why not make a 3D-printed holder ? Find here how it looks: http://www.astrofriend.eu/3d-printing/temperature-sensor-holder/01-temperature-sensor-holder.html I have uploaded the STL file if someone find it interesting to 3D-print it. All my STL files on the 3D-prining main menu: http://www.astrofriend.eu/3d-printing/3dprinting.html Note: my STL files can maybe have errors, but they work on my AnyCube delta printer with the Cura slicer. /Lars
  11. Astrofriend
    My old prototype board I have my mini PC installed at with its fuse terminal, volt & ampere meters and the main switch looks a bit ugly but practical when I have to change something. Now I decided to 3D print some encluosure to it. First I thought it would be good to include the mini PC in this box. But after some thoughts I change my mind and only have the periphals in the box and attache it to the PC with a bracket. Then I can change my PC with out doing an new enclosure, only the bracket. The drawing goes better and better, less mistakes and easier to do it with some smart tools. This is how long I have come with the box: http://www.astrofriend.eu/3d-printing/minipc-enclosure/01-minipc-enclosure.html Next thing to do is the lid to the box, it will hold the instrument for Volt and Ampere. When this is finished it will be so much easier to handle all cables and devices. Still it's very flexible if I want to change something. How many of you who read this use the FreeCAD software ? /Lars
  12. Astrofriend
    Is there something so exiting as when you can test something new that you have built ? I could do my first indoor test of the focus motor with it's 3D printed parts today. It's the USB-Focus and I control it through APT and ASCOM driver. Have a look at page 7: http://www.astrofriend.eu/astronomy/projects/project-300mm-setup/01-300mm-setup.html The gear ratio I could achive let me use 30'000 steps of the 65'500 availably. There is also an instruction how I calibrate the focuser. /Lars
  13. Astrofriend
    What could a man do without the IKEA tape. You could get them all over the world. Now I'm almost finished with the two pulleys, I have got the timing belt, the focus motor bracket is ready for a test drive, I'm printing the last part of the brackets to the guide camera and lens now. Tomorrow some test and after that a test outdoors. /Lars
  14. Astrofriend
    I solve so much problem nowadays with the 3D printer. Now I'm making drawings for a bracket to the QHY5 camera and the Tokina 200 mm f 1/3.5 lens that I have attached to it. That is my auto guider equipment. The latest, I have learned how to make pockets for the nuts, no more threading of holes. Easy of course for they who know how to do it: My documentation about it: http://www.astrofriend.eu/3d-printing/qhy5-bracket/01-qhy5-bracket.html /Lars
  15. Astrofriend
    Here comes more pictures, it's now the version 3 I'm working on. It took much longer time, 6 days with work until late night, but now the printer is working on it. It's all the small details that take so much time and the lack of experience of CAD drawing. Very often it complain of broken lines and it's hard to find when the structure is complex. Look at page 4 to 6 for the last details: http://www.astrofriend.eu/3d-printing/focus-motor-bracket/01-focus-motor-bracket.html When this bracket is finished I start drawing tube rings to the guider camera and lens. /Lars
  16. Astrofriend
    @ Adam: Many years ago I posted my photos on different forums, not only astronomy. But photos without text is not very interesting, and make a copy of my homepage to a forum will not work. It's not possible to edit the text after a couples of days if I find something wrong with it or have to updated it. That was the main reason to spend all this time on my homepage. But I will not live forever, but then maybe the information is too old to have any value. Yes there are so many things to think about and take care about in the construction. Gyroid is the fill I use most and maybe the best. Anyway, I have exiting times here for the moment, so much I can do. BR Lars
  17. Astrofriend
    Hi Adam, What kind of focuser do you have ? My plan is to have the TSL file for download when I feel it's good enough. I updated today and yesterday with more photos and text. Now I have to order the timing belt and adapt the dimensions of the bracket to the length of the belt. Lars
  18. Astrofriend
    My 3D printer is working hard. I'm now making the third vesion of my bracket that shall hold my focus motor in place. Narrow space around it and complicated geometry. This is how far I have come: http://www.astrofriend.eu/3d-printing/focus-motor-bracket/01-focus-motor-bracket.html If I'm lucky maybe I had it completed tomorrow. /Lars
  19. Astrofriend
    Now I have come so far that I can start with making 3D CAD drawings for the pulleys I want to 3D print. This is something new and I do a lot of mistakes, but still I have my first 3D printed puley and it looks to be usable. First part of my documentation: http://www.astrofriend.eu/3d-printing/camera-lens-focus-gears/01-camera-lens-focus-gears.html This is an sub part of my new setup for a 300 mm camera lens. 3D printing is amazing ! /Lars
  20. Astrofriend
    At last, I have 3D printed an adapter to attach an angled viewfinter to the polar telescope finder. This is for the Star Adventurer polar telescope, but I think it fit even others. My document of how I did it: http://www.astrofriend.eu/3d-printing/90degree-polarfinder-adapter/01-90degree-polarfinder-adapter.html It works so perfect compare to my film canister build adapter. This is my first real 3D printed product I will use so I have great times. /Lars
  21. Astrofriend
    I wish we had that problem with too much heat. In Sweden we can only do astronomical observations during the winter season. We have temperatures from zero degrees Celsius to minus 30 degrees Celsius. Welcome to Sweden 🙂 /Lars
  22. Astrofriend
    Interesting, what do you suggest for printing gears, pulleys, worm gears ? I have made some progress on my 3D-printer the last days. It's much easier now with updated software. Some notes from my progress, see page 12, working on page 13: http://www.popularastronomi.se/wp-content/uploads/2012/06/2006_3_blom_ogon_pa_solen.pdf /Lars
  23. Astrofriend
    I had a friend, Jörgen, he did daily solar drawings of Sun spots. I think he had a aequence of 25 years, sorry to say he had passed away. I hope no one threw away these wonderful drawings and that they can be published in the future. One article in Swedish by him, try to use google translater on it: http://www.popularastronomi.se/wp-content/uploads/2012/06/2006_3_blom_ogon_pa_solen.pdf /Lars
  24. Astrofriend
    Today I finished the translation and the last page is online. http://www.astrofriend.eu/astronomy/observatory-sites/swedens-old-observatories/01-swedens-old-observatories.html Read about the Zeiss planetarie we once had, the projector was sold to USA and used in the Gemini and Apollo program as a star navigation training facility. /Lars
  25. Astrofriend
    Yes the strength concern me, have to print and test and reinforce when needed. And how does the plastic material behave at -15 degrees Celsius ? /Lars
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