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About Astrofriend

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  1. Hi, Sorry for very late answere and thank you for tips. If needed I will add a electronic power regulator. But my experience I have got is that it work very fine already now. After that I started to use this heating band I never had any problem on my camera lens. The power are about 0.8 Watt and battery last many nigths. I could have much smaller battery, but I could also power my mount from it if I want. Normally I don't but if mount batteries goes down I have this as an extra power sourch. Here is one photo I tooked with my portable mount and a 150mm Sigma APO lens: Lars
  2. Ok, heavy wind is dangerous :-) , I will follow your and others advice and anchor the building safely in the rock, thank you for the tips! At last I got some time to start with the complicated roof mechanism of my observatory. I have choosen a construction with arms that hold the roof to get a low profile observatory. With a sliding roof you normally need higher walls and then have to fold down the upper wall, or a door that opens in the roof when open the roof to get clear of the telescope. And you have to move the roof far away to get a free view above it. But most importent, it's fun to do an unusual construction, if it will work at the end? I don't know yet :-) Here you can read and see photos of the observatory project: /Lars
  3. Hi Chris, From Denmark, or? My friend also commented that it could blow away. I have a little hard to believe that, it's a very heavy building, I can't lift it by hand. And if the wind moves the building it can't go very far because of the pier inside. But maybe you are right and I have too anchor it down. Maybe I will do it anyway when I have decided how high above the ground it shall stand. Thanks for the comment! Lars
  4. Hello, Thanks for all answeres and tips! Yes it will be very exiting when I for the first time can aim it to the stars. This weekend I built a simple test rig to find out what dimensions I need on the arm that hold it up. It should fit tall and short people. It will only be used when standing up, it's to cold to lay down in the winter. I think this could be very interesting when I invite people that are not too interested in astronomy. A beautiful look up there and they want to have more, or? Here is the latest progress: /Lars
  5. Hi, This weekend I had some time leftover to do concrete work on the base that the observatory legs stands on: I think I got it right, very stable now. Next time I will spend some thinking about the roof mechanics. /Lars
  6. Hi, It's the Helios, not very expensive but still it looks good when observing terestial objects daytime. Not dark enough here to test it on the sky, maybe moon. It will be exiting here too when the dark comes in the fall again. /Lars
  7. Now when I have APT that control the camera it could be a bit boring when waiting. Maybe I could do some visual observations when the camera are doing automatic photographing? I'm not a big fan of visual observation, but I recently bought a big 25x100mm binoculars and think it could be fun to have. It's very heavy and could not be handheld, I have to built a mount for it. This is something new to me so I reading forums and get ideas and figure out my own solution to it. As a first part I bought a caster wheel to have as a roller bearing. I will mount that on my second pier. If you find it interesting you can see more details here and follow my project: /Lars
  8. Hi Damo, Great thread and great photos! I just purchased a 25x100 binocular and now must build some mount to hold it, after some google search I came to your thread, just what I want to see. Now I have got a lot of ideas how to built something simular to hold my binocular. This is what I have: Maybe I use part of my used EQ2 mount's slow motion controls if it needed. I don't have any experience of a big binocular like this and what it need to be easy to handle. Thanks that you sharing your project ! ps. Your binocular weight is about twice compare to my Helios 25x100, is your a tripple lens design, or? /Lars
  9. Today we had a sunshine day and I went to the building market and bought two panels to cover the joint between the two roofs on my observatory project. I took some photos of this day work: Now I have come to the more complicated part, the mechanism that hold the roofs. /Lars
  10. No, I think they think, "bigger than fullframe" or at least hope so, then this mono chrome medium format sensor (about twice the size of a fullframe sensor) wiill be perfect in some cases. They have listed the QHY367C under medium size sensor, under large size sensor is nothing yet other then the text I wrote earlier. We just have to wait and see what they mean by those words. /Lars
  11. I think this medium format camera has a Sony sensor, and that one is a mono without Bayer color filter: It's a digital back without shutter, but maybe it can use the electronic shutter only, no cooling system. On QHY's homepage they say "Looking for bigger cameras? QHYCCD is trying best to develop it" . Maybe they have this sensor in mind? You only need a thicker wallet! /Lars
  12. Hi Alan, I havn't decided it in detail, but it's very flexibel construction so I can make both or change it in future. A sliding construction will be easier to make for the big roof but a hinge construction is easier to seal. What I'm thinking of is a hinge looking construction with two long arm lifting the roof in one end and sliding in the other end. But not sure it will be stable enough, start doing test during summer. Lars
  13. Today we had almost a summerlike weather. I spent the day to mount the roof on my observatory. The whole winter my project has been shut down. What I did today: It felt very good to have done this part of the roof, now the building is much more protected and easier to work with. /Lars
  14. Today it was a bad weather and I spent the day to collect more information how to do develop the Drizzle function and also wrote some examples how different number of reference points (stars) in the align procedur affect the stacked image. If you find it interesting to read more, visit my homepage: /Lars
  15. Now I have started next step on the develop of a new macro/function to AstroImageJ (AIJ). This will be a Drizzle align tool. I'm not shure if this will work but I will do an attempt to do it. I have started to collect the mathematical tools that's needed to do this and you can follow it on my homepage if you find it interesting: With a Drizzle tool you can get back the resolution you have lost by undersampled images, i.e. high resolution telescope and big size pixels. Google on NASA and Drizzle and you will se how they develop this method for Hubble Space telescope. This is much about matrices and one problem is that AIJ doesn't handle matrices as Matlab do. I have to find a solution to this, nestled loops and other things. /Lars