Anybody know how to make a baton?
Topic by Geeoff. | last reply
I apologize if I misplaced my topic; I'm sure it's nothing unusual though.Okay.. so at night when I go to walk my dogs, I have a huge open sky and not too much light pollution (Go figure -- Orlando, FL). The moon is always super bright, and about once a month, way larger than usual. Among that and the usual contellations, I see brighter objects, flashing ones, so I know they're planets. I see three of them nowadays.Thing is.. since I know they're planets, I want to see them bigger now! I want to see with my own eyes these planets, at least a liiiiitle bit bigger, but I can't afford a telescope. Even if I could, I'm just like the "why buy when I could make it myself"ers on here.I have some lenses; Some from an old (good for it's day) film camera, some from.. other things. Now I know they are problem very limited in their ability to do the requested job.. but like I said, anything is better than a blinking dot; I'll be happy with any beneficial results.I know someone is going to ask something about the lenses, and I'll tell you right now: I don't know. I have no idea how to "measure" lenses or their power.. so any guidance in this area would also be appreciated.Thanks guys!
Topic by NarNar | last reply
I would also like to control it from the ground. I wouldn't mind having to use manual controls but electronic would be ideal. I can't find anything online regarding using hydraulics. Any thoughts? Thanks.
Question by milkyway312 | last reply
Hello all, I wish to make a telescope with a long (1 metre) cardboard tube I got with a potrait I bought a few days ago. I already have 3 smaller tubes - 2 from silver foil rolls (which are very thin in diameter - about an inch), and another from a soldering iron (which goes inside the big tube easily). Is it possible that I make a telescope using three tubes (one sliding inside the other) and three lenses? If yes, how and what lenses I need to use? Regards
Topic by rseni
Hello, can anyone help me in regards to my telescope's remote commander? It is a bushnell north star 78-8890. lent it to someone and he returned it without the commander. It is practically useless now that it doesnt have the keypad. he said he is willling to pay for it buy we cant buy it anywhere. even on line?! I tried it myself, he was right. can someone find it for me or maybe construct it for me? please. thor
Topic by Mighty T H O R | last reply
Having seen some predictions of increased solar activity over the next two years, I decided to make a filter so I can check it out with my trusty telescope. To start out, I constructed the rig shown in photo A, and practiced with it by cutting disks of plain glass. Make a table like that in photo C so you can make a continuous score on the glass, without stopping. Put oil on the wheel of the grass cutter. Be sure that the surface you work on is flat. You can skip this if you want a square filter. After scoring, your glass should look like that in photo B, with a uniform and even cut. Next, put the scored glass on a soft surface like a mouse pad, with the scored surface wetted with water and face down. Press on the back of the score with a dull nail to start a crack. By continual pressing you can watch the crack propagate all the way around. Then, make 8 radial scores from the circle to the edge of the glass and propagate those cracks in the same manner as the disk. When you do it right, you get a result like photo D, where the pieces were separated for illustration. When you get good at this with regular glass, you can cut the mirror into a disk. With the mirror, you score the glass on the side that has the metal coating. Or, you can just cut the mirror in a square instead of a circle. Photo E shows an uncut and a finished cut mirror. The mirror came out of the back of a discarded projection TV. Some of the mirrors are plastic films, some are second surface, some are first surface glass but the metal coating is too thin. There are many variations, but you need to find a first surface glass mirror that reduces the light level by 12 stops (as measured by a LunaPro SBC light meter). Photographically, this is like reducing the light level from F1.4 to F64. This level of light reduction will be hard to find. WARNING: Use of a mirror with a thin reflective coating can result in eye damage if used to view the sun through a telescope. I have access to a smaller commercial filter to use as a guide. This filter produced a bright blue image of the sun, so I added a red filter at the eyepiece. This combination produced a normal yellow image of the sun. There were no significant sunspots visible, so I didn’t bother taking any pictures. The Filter is mounted to a screw-in lens cap.
Topic by ShutterBugger | last reply
This is the project: https://www.instructables.com/id/SpectrumLED-V20-the-ULTIMATE-Variable-Spectrum-Lam/ I want to upgrade the telescoping arm mostly because I can, not because I must ;) I don't open/telescope it very often because right now it's too long at its shortest position. I adjust the swiveling "head" all the time, and when the rod is tightened so it's easy for me to telescope it, the head swivels which is annoying. I would like to separate them. I already have an idea which I think will be good for the swiveling head: http://woodgears.ca/tripod/head.html I've come up with the idea of making a scissor lamp, but I don't think that will be very simple to make, so I was wondering if anyone has a simpler and better idea for making something that telescopes (and locks). Add pictures ⋅⋅⋅ᴬᶰᵈ ᴱᴱ'ˢ, ᴵ'ᵐ ᵃʷᵃʳᵉ ᵒᶠ ᵗʰᵉ ᶠᵃᶜᵗ ᵗʰᵃᵗ ᴵ'ᵐ ᵖᵒʷᵉʳᶦᶰᵍ ᵗʰᵉˢᵉ ᴸᴱᴰ'ˢ ᶦᶰᶜᵒʳʳᵉᶜᵗᶫʸ ⁽ᴺᴼᵀ!⁾, ᵇᶦᵗ ᶦᶠ ʸᵒᵘ ˢᵗᶦᶫᶫ ʷᵃᶰᵗ ᵗᵒ ᶜᵒᵐᵐᵉᶰᵗ ᵗʰᵃᵗ, ᵖᶫᵉᵃˢᵉ ᵈᵒ ᶦᵗ ᶦᶰ ᵗʰᵉ ᶜᵒᵐᵐᵉᶰᵗˢ ˢᵉᶜᵗᶦᵒᶰ ᵒᶰ ᵗʰᵉ ᴵᶰˢᵗʳᵘᶜᵗᵃᵇᶫᵉ ᵗᵒ ᵏᵉᵉᵖ ᵗʰᵉ ᶜᵒᵐᵐᵉᶰᵗˢ ˢᵉᶜᵗᶦᵒᶰ ʰᵉʳᵉ ᵒʳᵍᵃᶰᶦᶻᵉᵈ, ᵗʰᵃᶰᵏˢ⋅ Any ideas would be really appreciated :)
Topic by Yonatan24 | last reply
I'm starting to design a very large telescope for my "backyard", ideally it will be a 1 meter (or larger) Prime Focus Telescope. I am in the process of engineering the primary mirror and have concluded that I need to create an array of small hexagon mirrors similar to the Keck Observatory but smaller. This will decrease the quality of the telescope but it will make the project affordable. The biggest problem with this design is that the mirrors have to be exactly placed and tilted to form the a perfect parabolic curve, and frankly I have no idea how to practically do that. If anyone has an idea about how this can be done or questions about my project i would be glad to hear from you.
Topic by Twlight | last reply
Please tell me How to make a radio telescope (With simpleTools )?
Question by sky777 | last reply
What supplies do you need, as well?
Question by shanghai_breezes | last reply
How does a telescope work different from a camera lense? I'm specifically wondering about magnification. With a camera lense, a longer lense means higher magnification so to get really high magnification it needs a really long lense. With a telescope they just change the eyepiece to get higher magnification and don't change the length of the telescope.. How is it telescopes can change magnification like that and camera lenses can't?--tradingmic.com
Topic by Joella Erspamer
After calling my last diy project a success I decided to give another one a shot and am attempting to make an adapter for my easyshare c813 but all I ever see through the cam viewer is just blackness. I was hoping maybe someone here would have had some experience with this and could maybe point me in the right direction. My adapter so far consists of a couple layers of a pringles can wrapped and tapped with electrical tape inside and out. Ive seen similar contraptions made out of film canisters that work just fine even on webcams but Im having no such luck myself.
Topic by kithso | last reply
This question is more like 2 questions- 1) Am I crazy? 2) Is this feasible? Background: I recently inherited an astronomical reflecting telescope, which I think has been dropped at some point. The design is as below. Where the eyepiece enters the side of the tube that makes up the body of the scope, the tube is slightly dented. The eyepiece still points at the secondary mirror and the alignment is good enough that I can point the scope at an object and get an image, but the alignment isn't perfect so the image has a lot of what I'd guess is spherical aberration preventing a decent image. Firstly- is having the eyepiece on-axis and perfectly aligned so important that I will never ever get even a half-decent image from this scope? If the tolerance involved are 0.1mm and minutes or seconds of angle, I doubt I can restore it that well. Secondly, is having the eyepiece positioned on-axis as important as having it parallel with the ideal axial light path? As it's held in with three screws I'd imagine I can tweak the alignment with some use of spacers etc. but if it's off-axis I don't think I can shift it back to the perfect position. In other words, for the mathematicians, is having the eyepiece "translated" as much of a problem as having it "rotated"? (Thirdly- if the reflecting scope is trash, can I get a 150mm diameter 1000mm focus lens and make a straight-through scope with the bits?) UPDATE: it's working perfectly, see pictures below!
Topic by PKM | last reply
I'm looking for a cheap way to view images and the sky through a telescope on my computer or take pics with my digital camera. any ideas? al2009
Question by al2009 | last reply
I have acquired a couple of tv zoom lens from canon tv station cameras. Does anyone out there know of a way to turn them into a telescope. Or ad a camera back attachment. It seems like a waste tossing them out. The lenses are fine, btw I'm cheap!
Topic by cbucci | last reply
I want a camera that can shoot in extremely low light without long exposure times. it can be in black and white it would be nice if it did this with a very large lens so they make sensors for telescopes that are very sensitive, take very nice photos, are designedd to be hooked up to a computer and have whatever lens u stick in front of it work. i think we could use an arduino* a really big lens, and a telescope camera to build our own digital cameras with whatever outr special needs may be.
Topic by nicko0 | last reply
I'm looking for an inexpensive telescope mirror to attempt some DIY Schlieren photography. I don't need a flawless one that you would put in a telescope and use in an observatory, I'm looking for the one that fell off the back of an astronomer's truck on the way up the mountain and got a scratch down one side and a nick in the silvering to make it worthless for astronomical observing. Any handy "old junk telescope parts" websites out there?Or better yet, does anyone reading this have a decrepit old mirror sitting in their garage waiting for me to buy it from them?
Question by CameronSS | last reply
I have this very large suitcase which is in good condition, except the telescopic handle on it is broken, andy suggestions on how I can fix it? Everything else is fine on it. Too heavy to carry it. Too cumbersome.
Question by knitter08 | last reply
I am currently using a home built 3'' refracting telescope, and want to build a shorter focal length eyepiece to get some detail for observing planets (lunar surface, rings on Saturn, more of the moons of Jupiter. The current setup uses a plossl eyepiece with about a 25mm focal length, giving 30 to 40x magnification, and allowing very clear viewing of the moon, and will pick out three of Jupiters moons on a clear night. Ideally I'd like a 5mm to 10mm focal length, for a 100 to 200x magnification. I've considered using the lens out of a DVD drive, which looks as though it could work, although I've only seen one example of it done before. I also have a selection of reasonable quality prisms and lenses about 1'' diameter, with focal lengths from about 2'' to 4''. So, how well would a DVD drive lens work, and are there any interesting designs that make an eyepiece with a focal length significantly shorter than any of its component lenses (in the same way the focal length of a plossl is about 1/2 the focal length of the lenses used). Thanks in advance for any help. (Would this get better response in the photography section)
Topic by The Skinnerz | last reply
I want some ideas that you may have for a carrier. background: I want to bring my Dog on an airplane but he can't ride in cargo because there is a summer ban on dogs during hot months. I must fly before the end of the ban. The airline will allow a dog in the cabin in a soft carrier, if the dog and carrier are less than 10kg. My dog is 7kg so the carrier can be up to 3kg. It must be 27cm high 40cm wide and 55 cm long or smaller problems: the foot print is fine for my dogs they could lay down comfortably, but the height is small. I want to make a telescoping carrier so it can fit under the seat on the plane, but can open up for comfort in the airport and when moving. Any ideas are welcome and I'll post it as my first instructable once I make it thanks http://www.aircanada.com/en/travelinfo/airport/baggage/pets.html
Question by redorchestra | last reply
Sign-up for our newsletter here. Feb. 21, 2008 Welcome back! The Share the Love: Valentine's Day Speed Contest ends this Sunday, so get your romantic Instructables up this weekend! The winners of the Get the LED Out! Speed Contest have been announced. See who won here! Check out these cool instructables! Conductive Fabric: Make Flexible Circuits Using An Inkjet Printer Easily turn out flexible circuits to create some funky projects. posted by mikey77 on Feb 14, 2008 Remote shutter trigger for digital cameras Make a remote shutter release for your Canon digital camera (and some other brands) for about three bucks in under five minutes. posted by deth2all on Feb 20, 2007 How To Shave Without Getting Razor Bumps Here's how to avoid those little ingrown hairs known as razor bumps. posted by SteamKit on Feb 18, 2008 A better laptop stand for bed Make a simple but incredibly useful Laptop Stand for around $15 and 30-60 minutes! Great for use in bed while typing, browsing, and watching movies. posted by jumpfroggy on Feb 13, 2008 Simulated wood grain for metal boxes Prepare a metal box using a buffing technique that can simulate wood grain, birdseye or other finishes for a sleek look. posted by amz-fx on Feb 15, 2008 Spread the knowledge! Contest closes this weekend! Win a $350 Yoyo! A Dozen Red Origami Roses A unique twist to the traditional giving of roses to a loved one. Handmade origami roses are everlasting and inexpensive to& make. posted by thydzik on Feb 15, 2007 Cardboard Savonius Wind Turbine Build a Savonius wind turbine made out of cardboard to see what works. Low-tech rapid prototyping at its best. posted by rhackenb on Feb 16, 2008 How to Eat a Banana Like a Monkey OK, the actual eating isn't too different from humans. The real magic is in how monkeys peel their banana to get at the goodness inside. posted by fungus amungus on Feb 20, 2008 Build a real bell-striking clock for your PC Sound effects on a computer can't match the nice tones you can get from a real bell. Here's how to put the two together. posted by 5Volt on Feb 18, 2008 Make a Bloody Valentine's Heart Present your loved one with this anatomically-correct heart, a card ("You have my heart!"), and a ring hidden in the heart for a day to remember forever. posted by theprojectmaker on Feb 16, 2008 Show us your yarn! The Lion Brand Yarn Challenge has closed for entries, so it's time to vote for your favorites. Here are some more of the over 450 projects entered - rate your favorites, talk to the crafters, and get inspired. The Lion Brand group lives on, so keep posting your yarn creations! Bike Kippah Skirt Afghan Bootcovers Now go make something awesome, and I'll see you next week! - Eric
Topic by fungus amungus
I keep wondering about how cool it would be if 100s of amateurs trained their robotic telescopes, hooked to the web, on one part of the sky, via commands over the internet from some astronomer who's got a hunch or just spotted a new spot on Venus or whatever. Those 100s of telescopes then took a photo at the exact same instant(or nearly so)and the same spot and then send that photo over the web to some big iron or a BOINC like app that would then crunch all the photos together to get a better picture of that object without having to go to Hawaii or Chile to get a decent shot... instant big lens astronomy?!
Question by pleabargain | last reply
I am interested in building an electronic system to control the orientation of an astronomy dome based on the orientation of the telescope. I need suggestions on the various components I might use. Motivation: This is a Meade 16" LX200 telescope in an Ash Dome. Owned by a friend who doesn't use it much. I get to use it, maintain it, enhance it for about 1 week a year. I can control the scope with my laptop using a program like "The Sky". However, after the telescope is pointed, I have to manually manage the dome and rotate it with a bi-directional switch. Very tedious. The motor is 1/4 HP, 1725RPM, drawing 5.6 Amps at 120VAC. There are programs that can be used with the telescope control to manage the rotation of the dome, but I am thinking of a lower-tech solution. I would like to put some reflecting tape (perhaps mirrors) on the sides of the dome slot and point some lights (perhaps LED lasers) with a pickup device (hence the idea of the garage door styled "electronic eye"). The general idea would be to set up some simple device that would detect the change in location of the direction that the telescope is pointing, and activate the dome to track with the telescope. If the telescope turns, the light would no longer be reflected and the dome would try to "find" itself or re-orient to a point where the light is once again detected by the reflection from the mirrors on the dome. I was thinking about: Garage door electronic eye activators 120V 6A relay switches 2 enhancements: detect direction of the telescope; bar codes in the reflective tape wireless signals to send activation to relay switches (telescopes go in circles and eliminating wires is always good.) Anyone have any ideas about pre-built components, sources of good relays, electronic eyes, etc? TIA, Chris.
Topic by chrisjx | last reply
I'm selling an orion starblast 4.5" telescope: www.google.ca/imgres?imgurl=http://eridanusoptics.com/store/images//telescopes/eqmounted/OR9798.jpg&imgrefurl;=http://eridanusoptics.com/store/index.php%3Fmain_page%3Dproduct_info%26products_id%3D333&usg;=__fD6BTgmBfp6XqGZOFCZIjfwgw0o=&h;=500&w;=500&sz;=40&hl;=en&start;=0&zoom;=1&tbnid;=kScIj7bBieqngM:&tbnh;=149&tbnw;=149&prev;=/images%3Fq%3Dorion%2Bstarblast%2B4.5%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26sa%3DN%26rls%3Dorg.mozilla:en-US:official%26biw%3D1280%26bih%3D768%26tbs%3Disch:1&um;=1&itbs;=1&iact;=hc&vpx;=347&vpy;=69&dur;=432&hovh;=225&hovw;=225&tx;=135&ty;=88&ei;=K5Z1TJiLOoOC8gb54r3yBQ&oei;=K5Z1TJiLOoOC8gb54r3yBQ&esq;=1&page;=1&ndsp;=25&ved;=1t:429,r:1,s:0 It also comes with a 25mm eyepiece and a 10mm eyepiece and also a x2 barlow lense. The price I am going for is $350, tell me if you would buy it or not.
Question by solarblade90 | last reply
Hello everyone... A whhile back I stumbled upon a website that would allow you to enter in your location information and do a search based on "celestial events" "IST fly-over times" satellite locations, meteor shower events, eclipses etc... I recently bought a DSLR camera and a telescope with camera mount. My Son is very much into astronomy and I would love to encourage this for him... The telescope is nothing special, it is my, as well as his first telescope. I would like to capture photos of this up and coming eclipse in April, as well as some star systems and meteor shower events with some long exposure. :) anyway... Does anyone here know where I can find this type of calendar.. I have spent much of the morning Googling, but I am coming up short in finding this... Thanks in advance Matthew
Topic by SlickSqueegie | last reply
I am not exactly sure where to ask this. I have about a 3-4 foot articulating camera arm, which I use for a completely different purpose (medical related). It is great at what it does, except it is very difficult to precisely adjust it. I have not seen anything that will do exactly what I need, but it would look somewhat similar to that type of articulating arm. It would need to have two telescopic sections plus one or two articulating joints. I think I would need to find each of those sections separately and then put them together myself, because I have not seen arm with that precise configuration of sections, and that is as lightweight as what I need. Where should I look for such kinds of parts?
Question by dmehling1 | last reply
I want to use my TV as a monitor as well. But I need it to height adjust on the wall about two feet, for the two different uses. No pre-made brackets that do this...any idea what to use to build it? I'm assuming that it would be a flat screen bracket that can slide up and down on some sort of rod or pole secured to the wall. Not sure what system to use to be able to secure it at the two different heights. It's a 22".... It seems a waste to not be able to use it for both and clear out the monitor I have now. Any suggestions are appreciated.
Question by mikimouse11 | last reply
My good friends are getting married. they met 16 years ago. i would like to build a trigger that is activated by the light of a star 16 light years away. the trigger would turn on the lights set up for the party. I have a telescope and have found a good candidate star. what do i need to build it? is there a light sensor i can hook up to the telescope? how do i hook that up to a switch? Please any help would be greatly appreciated. thanks
Topic by ishmael101 | last reply
Hi! Im gonna try out this project, Telescope , as I know nothing about optic or lens function maybe someone could just let me know if I should go for a Tele-Auto 6.3/400 mm or a Sigma 70-300 mm F4-5,6 DL Macro Super. I asked the creator but as time runs out for me I hope this gives a faster response =) Thanks
Topic by Suizezem | last reply
I recently came across a spare LNBF in my shop. This is basically what you attach to a dish to receive your satellite TV. I read up on them and I have a fair idea of how they work. I was going to use this in some experiments and I found that you have to power it through the same coax that you receive the signals from. I want to use this for a radio telescope. I was wondering if anyone knew how to do this?
Question by crocboy | last reply
What can the focal lenght of objective lens of 5 inches diameter be?
I wish I'd posted this a while ago, but I think I was remembering a post in some other forum as being on here. I'm not selling these or making money, I just think it's cool.2009 is the International Astronomical Union's International Year of Astronomy, in recognition of both Galileo's first recorded astronomical observations and Kepler's publishing Astronomia Nova. As a part of this whole thing, the Galileoscope was created.Although most astronomers/telescope enthusiasts discourage buying telescopes of this size, because they are usually crap, and just discourage you with lousy views, this one was designed by professional astronomers. While it is largely plastic to keep costs down, the lenses are high-quality glass achromatic doublet lenses, which are usually found in much more expensive 'scopes. The other cool part about this project is that you can anonymously donate a telescope, and it will be sent to someone who can use it, whether it's a homeschooling family in Iowa or a schoolhouse in southeast Asia.Oh, and the best part: the telescope is $15. You really can't beat that price, and shipping is only $8.95 in the US. If you donate one, it's $12.50 with no shipping charges. I bought one, even though I have a larger telescope, as a more portable one for quick peeks at planets and to take on trips.Buy one! Or two! And donate some! They're cheap!Update 30 Aug 09: due to increased manufacturing costs since they started production, the price has been raised to $20 plus shipping to buy one, and $15 with no shipping to donate one. Still a heck of a deal, though.Second Update 2 September 09: ZOMG IT'S HERE! I should have just ordered the thing when I first heard about it. I was order #22,670, and the first 20,000 were shipped in mid-June. I have it, though, and I'll be posting an Instructable with assembly instructions as soon as I get around to it, and pictures taken through it once this stupid overcast blows over.
Topic by CameronSS | last reply
There are many uses for a pixel by pixel image generated using simple values, however there doesn't seem to be an easy way to do it. I have used excel and its shading by value feature, but this isn't always the most effective method. So assuming you have two coordinates and a value between 1 and 1000 (like a temp or rf intensity) how would one easily create an image from this data (array or matrix). Matlab or Mathematica? The goal is to make a kind of radio telescope that measures rf intensity with an arduino and then creates an image based on the values spread across a matrix.
Question by seedorfj | last reply
Me and my cousin both really want a collapsible baton and I was hoping to make it out of copper piping but I am not sure how to make it work properly.
Question by CR15P33 | last reply