One of the neat things about the square design is that the A bit of a monster! wobbly knob still works, and adds character. I was annoyed to have made the mistake, but very glad that I checked the position on stars before wrapping the tube in veneer. Total cost for supplies for this project: It took a lot longer than I expected to receive my mirror and other parts from Discovery. Our websites use cookies to improve your browsing experience. needle so the knitting needle will be snug against the drawtube without he might just have a $3200 camera, they aren't very hard to come by. I redrilled the holes for the mirror cell and got ready to wrap it. I am a retired USAF electronics engineer, and might even do much of the construction of the base with welded structural tubing, as, I do have a complete metal working shop besides my wood shop, here. 100A81BF-2145-44D5-BC76-66DBF43BAD58.jpeg. I like the old way of using stepper motors and other stuff introduced years ago by Mel Bartels, he is a master for me. I then attached the Ebony Star ring using contact cement. PhotoPictureResizer_190723_214534574_crop_2558x3105_copy_1023x1242.jpg. After the second call, I received a response that it would be ready at the end of the following week. you could probably space the bearings 3/4" apart instead of 1" and mount Sh2-169 and Sh2-168, IC5146 Cocoon Nebula, Caldwell 19, Sh 2-125. ill ask him for a detailed list of what he used and when i get that ill post it here for you. I placed my telrad, optical finder, and an eyepiece on the focuser end of the tube and, using a broomstick as a balance point, found that the tube balanced 22 inches from the bottom. This was to allow the circle cutting jig to be attached to the board to cut the arcs from a center point of 25 inches above the ground. The silly colours are mainly due to me experimenting with various clothes dyes in the anodising. I had already made a lightweight focuser for Part numbers 351-4574 and 336-422. A project collaboration and documentation platform. Now attach the screw eyes and the rubber band on the side of the board. If your optical train is heavy and the focuser has to bear it (see above) then this motor may be a better choice. Some of the very best planetary and deep sky pics I have seen have come from a Fuji S3 professioanl camera [based on a Nikon body] and a Canon 20Da, which was designed with [I think] a user replaceable inside the mirror box filter for astral photography. A Pocket Sundial From a Broken Pocket Watch! Newton, and others including James Gregory and Laurent Cassegrain, believed that a reflecting telescope would not be affected by the chromatic aberration that affected . It had been described by many as the most important recent volume for anyone planning to build a dob, and I have to agree. Finally it was etched in caustic soda, and anodised matt black. I started with a spacer that with a inch outer diameter. You really need a step ladder even for my 10" when pointed overhead. My wife helped me by moving the mirror into and out of the tube around the marked spot while I stood at the eyepiece trying to bring some distant trees into focus. If you enter it in the next contest please let me know and i will make sure to vote for you. The version number "312" here may change if Robert posts new firmware. It is not very powerful, it will not supply enough torque if you put any load on it or have a heavy optical train (like I do) and the focuser has to "pull" it upward when the telescope is vertical. You should now be able to drill the 4 holes at each corner. With an outer diameter of 14 3/16, I cut the Tube Box sides 15 5/8 and 14 5/8slightly less than my extra inch extra on each side. It doesn't. A tilted focuser will have no effect on the image quality. Here we see the following components installed: Notice we are NOT populating the parts of the board intended for Wifi or BLED. The one company that did provide a price quoted over $500more than I was willing to pay for cardboard! This can be shimmed out with paper wrapped around the The spider, or secondary mirror holder, will suspend the mirror in the optical path in order to direct light into the focuser. It may need some careful coaxing with a screwdriver. by cranking This is the upper tube that contains the flat secondary mirror, Telrad finder, and focuser. i got a email that someone built a telescope close to mine that has seen the stuff in the photos here is a link to his site http://www.synapticsystems.com/sky/scopes/Dob.htmlif i seem a bit rude please forgive me i just spent 12hrs in a plane i have jetlag and im sitting in a airport.i would like to thank lvlasertech for keeping this instructable lively and informative. crafts, science & engineering, design, and technology. More commercial crayford focusers are of a more enclosed form, whereas mine is more "open frame" approach. After looking at many focuser options with a big range of prices, I decided to order a GSO 2 speed Crayford focuser from ScopeStuff. The drawings are only approximately to scale. At this point, the scope was pretty much finished. All Orion 1.25" and 2" telescope focusers are engineered to provide smooth drawtube action to ensure you hit the exact focus point . And, once your telescope is finished, be sure to join a local astronomy club to learn more about the sky and share your hobby with others. I'm' glad I did, because I didn't like the first color that I had chosen. Use the externalMirror Edge Support Calculatorto decide whether to use a two-point, four-point (whiffletree), or sling support. Shorter thread side will be used to attach the eyepiece. Also no obvious diffraction spikes in the m31 photo. Keeping with the 'simple ' part of your request, here is a helical 2"/1.25" focuser made from std plumbing parts. I built mine entirely from CNC-cut plywood, and fastened it together with 2 bolts. DIY Electric Focuser - ATM, Optics and DIY Forum - Cloudy Nights I wanted the long focal length for good contrast. I did not own all of the tools that I needed for this project, particularly a table saw and router, so I did a lot of work while visiting my Dad. Some quick tips to note if you are making a homemade telescope are: 1. Telescope Magazine. 1N5408 3A Diode (you may need to make the pins smaller to fit through the holes in the board. I have no dog in this hunt whatsoever, but if people are impressed by these photographs and vote for it because of them when there's no proof that this scope generated the photos and there IS data to the contrary (see below), then that's certainly not fair to the other contestants. Remember: It is the quality and SIZE of the capture chip, NOT the megapixels that determines quality. See the images how I plan to assemble it. Upload that main sketch to the Nano. Nice work and great instructable! Telescope Focusers | Orion Telescopes: Shop Nice looking telescope. Interfaced with a computer, so the computer can make the decisions about where the best focus is. The bigger upvc nut will be attached to focuser plate and longer threaded side will be used on it for the focusing. Download the Gerber Files. I called to express my concern and was told that it had all been packaged a few weeks ago and that it should have been sent. I laughed, packed up the cell with a long letter describing the series of events that led to the return, and put it in the mail. a "rubbery" feel. Robert Brown did an excellent video on how to work out your stepper motor requirements. I drilled the holes in the center of the ground board and rocker bottom using a 9/16 bit, thinking that I needed the extra 1/16 so that the spacer could move. I gave them a call and they said they had one on the shelf14 inches in diameter and 12 feet long! Another thing, the resolution on the Dumbell nebula seems a bit too high for that telescope. These are mounted 120 degrees apart and use 4 inexpensive bearings to support the tube. And for those who like to work with 3D printers, both the single speed and dual-speed versions could easily be printed. I decided that my best option was to scale up their 8 inch design for a 12.5 inch scope and sacrifice the portability and easier storage of a truss scope for something that I felt confident in building myself. Using a compass, I drew lines for the inside and outside of the Ebony Star ring on the top and bottom of the rocker bottom. and an eyepiece. It wouldn't be a two-speed design, but if I used a thin enough I am working on a diy focuser design for my 6" F/8 telescope and asking suggestions for simple focuser. The ARtemis module came in a kit form actually just two circuit boards one of which I had to source the parts, build and box myself. It was easy enough to drill a hole and tap threads for a I made a similar helical focuser with a nice 2 inch thing I found in Classifieds. After the glue dried but before the clamps were removed, I added corner braces to all four corners of the tube using glue and brads to hold them in place. The focuser shaft on the telescope is 13.1mm in diameter. Drill the holes for the knitting I want to put my 12.5 mirror in a collapsible structure so I can haul it easy, Say a truss tube design, 7 years ago Share it with us! For the ATMer I do find that there are an endless number of parts that can be designed and printed for home built telescopes and binoscopes. I found a used 16 primary on eBay. Or rather, I hated it. You won't need to write any sketches from scratch, but you will at least need to figure out how to upload them to the Nano. It took a lot longer than I expected to receive my mirror and other parts from Discovery. Every primary telescope mirror has a fixed focal length thats usually 4 to 6 times the width of the mirror. I built a second set of electronics, and I had the NEMA 17 Direct Drive motor left over since it didn't work for my Orion ED80T-CF refractor. I called to express my concern and was told that it had all been packaged a few weeks ago and that it, For complete instructions on building a telescope such as this one, I strongly recommend buying a copy of, After cutting the circles for the side bearings, I set up the jig to cut the curved edges of the rocker sides. Pierre's Helical Crayford gets my vote hands-down for elegant simplicity. You will have to line up the diagonal and primary so that you see a centered image of the sonotube opening and the spyder in the eyepiece hole. forward and back along with the drawtube when you focus, and you'll get The next day, I called back to ask their opinion about the kind of spider and secondary holder to order. Brandon Lawler is a hobbyist telescope Maker and an active member of the Central Texas Astronomical Society. on Step 3. After picking up a copy of The Dobsonian Telescope by David Kriege, I built my first telescope with a 12-diameter mirror, then later tackled a 12 lightweight scope. This means I can use FocusMax to do the focusing. I am thankful to enjoy the inspiration, and the details, that you provide, as I will soon be constructing a Dobsonian Telescope. This combination has the best resolution (steps/revolution), so I didn't see any reason to build anything else. Not sure how your toilets are built over there, but here they use what is called a tank flush valve. I attached three feet equally spaced on top of the ring, and on the opposite side attached teflon pads 1 X 1 directly above the feet using very small brads and countersinking the brads below the surface of the teflon. needle adds no friction that I can feel to the focus action. weight. haven't yet found any design elements that need improvement. I This is the kind of simple off the shelf design I was looking for. Again from the main FILES page, go to "ASCOM DRIVERS" and download everything. But who cares, really? a 3/4" thickness. This simple homemade device will reduce star trails far better than if the camera was mounted on a tripod alone. So I decided to make my own, using my normal "blunder in naively and see what happens" approach to making things. The length of the Rocker Front also had to be changed so that the outside edge of the Side Bearings matched the outside edge of the Rocker Sides precisely. The lumber yard also gave me a lower price than I expected. I don't *do* pretty. The next day, I centered the rocker on the rocker bottom (which had been cut using the same method as the side bearing circles), drawing perpendicular lines through the center of the rocker bottom to use as a guide, and tracing the position on the rocker bottom. I had chosen a boxy, rigid design for the binocular scope, so Orient this assembly to allow you to view an object on the far horizon. the drive shaft close against the drawtube. Inside the OTA is a ring of tightly fitting flocking paper that prevents any light getting in around the drawtube. The glue should keep the nylon from fraying. There was the expense, for one, but also the It features 2 semicircular arms, and mounting points for the trusses (T-nuts are fine), as well as a lid to keep the mirror safe when the telescope is not in use. on Introduction, Very nice build nikon20. I wasn't there so i can be 100% but i do not think my friend was lying to me and i believe the pictures are from my telescope my kids use it for stargazing a lot i have seen some deepspace but i use it mainly for sketching the moon and i like to view solar flares. that is a great website that guy has some fantastic photos. var pageTracker = _gat._getTracker("UA-1008534-4"); The kit just contains the electronics - it is up to the user to find a stepper motor and attach it to their own telescope focuser. Thanks Pinbout for sharing your design. By adjusting the bolts, the mirror can be pointed toward the correct spot. When you figure out The 48 inch width of the veneer was close enough to the diameter of the tube that I used it as is. Then it was time to stain and finish. Parts List (the full story of acquiring the parts), The primary, secondary, spider and secondary holderDiscovery Optics. My homemade motorized telescope focuser for Celestron C8. As I set of the scope, several club members came over to check things out and it was nice to hear the positive comments on the appearance of the scope. Crayford focusers are considered superior to entry-level rack and pinion focusers, normally found in this type of device. (actually, it ended up a smidge more than 2 inches). We then spread contact cement over the remaining veneer and tube surface, waited for the glue to dry, and carefully rolled the tube over the veneer. You can see that my Moonlite focuser was slightly larger than the sides of the tube. And a couple of upright bearing blocks. I also decided to make a separate mounting plate for the stepper motor, since I figured aligning the shafts precisely would be all but impossible. I then temporarily installed the secondary mirror so that I could measure the approximate distance to the center of the secondary in order to locate the holes for the focuser.

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