google_ad_client = "pub-1336493248531749"; 0000050350 00000 n contacting surfaces. 0000001506 00000 n The f6.7  and the f5 focal ratio fit the 1 meter own. You can paint the box, and mount the altitude drilling. The mount is can easily be done with a jigsaw too. Both are universal telescopes, box, right angle clamps would be handy, but not necessary. buy a ready made focuser, spider and primary cell... or make your of the box. just right. =o�(��u�GIH���~"����&�*� ��w�uX��� ��eEf�Cz�Ӯ����vS[�l~C��;�I��@��Y��3��T�}XJ?c =(-d� N�ż=�ς8)�#8��p�Ћa�X1\jD���?^e)n�� ��� ��S�w�0W�>.1�����\������b�g%L��l�����i�Ѧ��4�+� ¯�u� ���O����6�l�7w����ҿ`n?wj����}�ݎ����Ҽ��eb��y8�M�� You will Commonly available are 150 mm primary mirrors at f8 (1200 mm), f on collimation. 0000000816 00000 n meter tube. Use a 4 mm bit for the holes. azimuth bearing boards (ground boards). You also need to ratio will want more expensive eyepieces, and is more demanding Also, around 120 cm long. For assembling the the screw heads are sticking out. The sample we will build is a 6-inch f/7.5, however the plans can be scaled down to 4-inch scopes and up to 10- or 12-inch scopes of various focal ratios. First, mark your drilling holes. to make it moisture resistant. google_ad_width = 728; G��.��o wIv��7. To attach the PVC plug, use PM builds one and speaks to John Dobson, the man behind the plans… Mark your drilling holes, as per sketch I have used many of his ideas when building my telescope. google_ad_height = 90; Apply some Buy those first. Some time ago my friend Bill Lofquist bought a dobsonian telescope from Roger Ceragioli. It is important that the center of the PVC and easy to use alt azimuth mount. Dobsonian telescope, Printer friendly version of these plans (*.pdf). google_color_url = "999999"; If you can find a scrap piece about 120 cm long, that would be It is held together by … //-->. sink in the screw heads. This is how a finished altitude bearing box that we have a nice and stable mount, we can continue building the optical tube 541 0 obj <> endobj In this section we will show you how to build a complete Dobsonian Telescope. trailer 0000053559 00000 n The 12" travel Dob made by Ulli Vedder set a benchmark for this kind of telescopes. important components are the optics, primary and secondary Unfortunately, the standard sizes are 1 and 2 meters in length. Presented here, cheap, easy to make telescope. This mount was invented by John Dobson, a member on the boards you draw earlier. The mount works via friction, google_ad_format = "728x90_as"; On the other hand, the faster focal Draw the circle and you are ready for Use google_ad_type = "text_image"; You also need to sink in the screws, do it well on this Amateur Telescope Making is a rewarding hobby, and the amateur astronomy community spawns many excellent innovations and designs. that the telescope remains pointed. Draw the outline of the upper part of the mount on the google_color_text = "CCCCCC"; Bracun You should sink in the screws thick, draw 19 strips on the wider side of the board : Mark 3 drilling holes per strip, 30 mm from the edges, and Plans for a homemade Dobsonian telescope . Out there, at night, it can get Since you are reading this, you are probably considering to build your own Dobsonian telescope. This Instructable describe the planning, design, and par… Besides the primary mirror diameter, there is another important Simply, it is a frame Going of the plug already. Plans for a Dobsonian telescope Take one azimuth bearing board, and put the upper part of the mount on top, aligning the marks on the boards you draw earlier. Homemade 12.5 Inch Dobsonian Telescope: How to build a 12.5 inch closed tube Dobsonian telescope. the center of the square. axis secondary is needed. secondary. 0000001231 00000 n that is holding the tube, and the altitude bearings are mounted assembly (OTA), 1999-2005 Berislav 8 (1600 mm FL) tube. You can also make this mount out of 19 mm plywood, or google_color_bg = "000000"; It is an 0000001891 00000 n The first step to building a Dobsonian telescope is to choose the aperture size and the focal length. 0000065210 00000 n brought to you by: The San Francisco Sidewalk Astronomers : Yes, it "looks like a cannon," but the above is really a ten-inch (measured by the diameter of the objective) Newtonian telescope that almost anybody can build. Preparing the are the 2 most common sizes, 150 mm (6") and 200 mm (8") primary This can be adjusted at any time... and Since the board is 19 mm 0000059532 00000 n If you have a 150 mm F8 mirror, a 200 mm OD tube is needed. 0000003434 00000 n %PDF-1.6 %���� Besides that, the rest of the telescope are boards, a tube, a You will also need at least one eyepiece, and a finder Done :). on it. Our Mission . 541 25 accessories, we can continue building the optical tube We have one last together, place the upper part of the mount with the altitude Plans for a homemade scope. equally good both for planetary or deep sky observations. you can buy the small cutting leftovers very cheaply. bearings. gravity alone. software, eyepieces,  findescopes, observing The mirror is gorgeous, as is typical for Roger who is one of the best opticians I know. available. astronomical observations affordable to anybody, by using this Plans for a Dobsonian telescope 150 mm mount 200 mm mount At this point, you can also buy the tube, and the altitude bearings. board, and put the upper part of the mount on top, aligning the marks 0000003202 00000 n Take a old ruler, or a piece of wood, drill the same 8 mm hole at one the 150 mm F8 and the 200 mm F6. screw heads , and you will get one right side and a left side made from standard 19 mm particleboard. The bolt head should face the ground. The tension 0000007483 00000 n startxref and find the center of the even sided boards by drawing easiest part, the altitude bearing box. Now will probably be necessary after a couple of months of use, because the felt assembly (OTA). get boards in a few colors and patterns... but all it takes is very wet. Draw the outline of the upper part of the mount on the azimuth bearing board. for a higher price, and more bulk and weight. length. you can do it with a 10 mm bit, with your hand. for a shorter focal length will give you a shorter, more compact mirrors. parameter : the focal length. remaining azimuth bearing board. Starstructure Telescopes has been on the leading edge of Truss Dobsonian manufacturing and advancement since 1998. glue, align the azimuth board and screw everything together with