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About Astrofriend

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    Star Forming

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    Astronomy, Cars, old stuff
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  1. My EQ6 projects continue forever. I had a lot of problems with the hardware driver in the EQ6 mount. There is some bug in the driver I had understand, that's why there is a RA drift compensation in EQMOD. With my custom gear ratio this problem got worse. Now I decided to replace the original driver with an external driver. I already have an AstroEQ driver that I want to test. I need some space where to place it, I have here started 3D-print a new lid for the EQ6 mount: http://www.astrofriend.eu/astronomy/projects/project-eq6-dismantling-rebuilding/20-eq6-dismantling-rebuilding.h
  2. It's the end of the astro season for us in Sweden, I maneged to take a last photo with my new setup with the Pentax 645 300 mm lens. That was good for me, I need motivation. I have struggled with this new system over 5 years, most problem with the Raspberry to get it to controll it. This is the first astroimage with the new setup, are you curoius of how an 35 year old lens catch the stars ? Very light polluted environment from my balcony, Bortle 9, but look at the shape of the stars at the corners of the full size photo, it's a full frame camera sensor. http://www.astrofriend.eu
  3. That must be very exiting to show the youngs. We have a big planetarium here in Stockholm, Cormonova. It was a couple years since last time we visited it, my girlfriend wnet seasick /Lars
  4. Yesterday I got a massive help from my friend. It was the stup of GPS unit for the Raspberry which has caused me problem the last 5 years. Now we got the GPSD driver to work direct with a GPS dongle: http://www.astrofriend.eu/astronomy/projects/project-heq5/07-heq5.html And the GPS NMEA where the Raspberry get the clock and position from a smartphone: http://www.astrofriend.eu/astronomy/projects/project-heq5/08-heq5.html Very glad to have solved these problems. Next step is to install KSTars on an Android pad. My own was to old to install the software on. /Lars
  5. Hi Bish, Glad to hear you find some interesting. What kind of project do you do in the astronomy area ? ps. Nice with cars in the summer with no dark skies. /Lars
  6. Maybe you have got problem as I did with the temperature regulation of the 3D-printer. In my case I got this problem when I changed from PLA to ABS pro filament. When I set the nozzle temperature to what's needed for ABS it didn't stabilize enough. It oschilated around the set temperature and the 3D-printer refused to start printing. It was the P.I.D. parameters that was wrong. After some research I found how to solve this problem. I have write it down how I did it. Maybe interesting for other users of 3D-printers. http://www.astrofriend.eu/3d-printing/3d-printer-setup/15-3d-printer-
  7. I know from my friend who live in Uppsala, the 19th instruments are still in place in the main building. One of them is the exiting double refractor. /Lars
  8. This is a follow up to the article "Old Swedish observatories" I translated not long time ago. We made a visit to Uppsala old observatory which is placed in a beautiful park almost in center of Uppsala in Sweden. I took some photos from the visit and have tried to find some information to it: http://www.astrofriend.eu/astronomy/observatory-sites/uppsala-old-observatory/01-uppsala-old-observatory.html /Lars
  9. Hi Steve, Yes, Ekos and KStars. I have a lot of problem with this earlier, but now with the new Astroberry version 2.0.3 everything worked after an update. I use this because it takes much less space and don't need very much power to run, important when on battery with a portable equipment. This is what I did one year ago, never got it to work: http://www.astrofriend.eu/astronomy/projects/project-kstars-raspberrypi4/01-project-kstars-raspberrypi4.html Now when it works and if it's stable I can replace my other setup which is Windows based with a similar contro
  10. Last night I could do my first test with a Raspberry controlled HEQ5 mount. Worked much better now compare with all problem I had one year ago. I succeeded to: Plate solve, auto focus, take images. What's left to fix, auto guiding, GPS module to communicate. Tonight it looks to be a clear night too. I will do a new test run, concentrate me on the auto guider, now in the beginning I use the internal guider, later maybe I change over to PHD2. Very exiting. My setup of HEQ5 and a 300 mm Pentax 645 lens: http://www.astrofriend.eu/astronomy/projects/project-heq5/01-heq5.html /Lar
  11. If you have a EQ6 mount as I do you maybe noticed that the bottom of it is not flat. If you want to install it on a pier you must have something between the EQ6 mount and the pier. I started with one made of wood and planned to replace it with one made of aluminum. But now when I have a 3D-printer, can it be made of plastic and still be stiff enough ? Curious as I'm I have to do a test: http://www.astrofriend.eu/3d-printing/eq6-pad/01-eq6-pad.html Still printing. Lars
  12. Today I came in contact with a person that maybe can let me into the observatory building. Lars
  13. A couples of days ago I fixed the tilt of the camera that I had. The tilt is caused of the bayonet of the adapter isn't tight enough. I thought about a lot of different solutions including a new 3D-printed adapter. But after a while I choose a very simple solution, a string and a spring that force the camera to be in correct angle and position. Have a look at my photos from my Pentax 645 project: http://www.astrofriend.eu/astronomy/projects/project-pentax645-300ed/04-pentax645-300ed.html When the camera is out of focus the shape of the stars look very strange, but when in focus okay,
  14. Today I anlyzed my flats that I have taken with my Pentax 645 300 mm lens, they are takne at full aperture, f/4. As I expected the vignetting is very low, much lpwer compare to my Canon 300 mm L lens. That was one of the goals. Of course I want it to be a sharp lens too. It looks okay but at one corner the stars are a bit elongated, it must come partly because of a tilt of the camera house. The bayonette adapter doesn't fit very well and cause this. This how the vignetting looks: http://www.astrofriend.eu/astronomy/projects/project-different-lenses-vignetting/06-different-lenses-vignettin
  15. One more clear night and I could do more test of my new setup. This night I tested to autofocus the lens. First I used APT which I downloaded the latest Betaversion of. In the Beta version is a more advanced autofocus function implemented. I got it to work, but there are things that need more development. I installed N.I.N.A. which also have an autofocus function, it worked pretty good and I could setup the focus motor's backlash compensation correctly. Some screendumps and explanation text of what I did: http://www.astrofriend.eu/astronomy/projects/project-pentax645-300ed/01-
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