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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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FINDER SCOPE xx TELESCOPE Homemade mount for a finder scope is made from truck muffler clamps and bearing retainers. Est. cost: $10. Tip on a free dew cap for an 8x50 finder. 50mm finder made from PVC-pipe fittings. Tip on aligning the finder scope with the main telescope's optical axis. Make a slip-on right-angle prism accessory for your straight-through finder scope. Made from a 35mm film canister and a $9 prism. Tracking telescope using surplus M-17 elbow telescope. How to make an elbow finder telescope that makes centering the eyepiece on an object and scanning the sky more comfortable. Mounting bracket for a finder scope is made from a cast aluminum coupler normally used to splice 2" electrical conduit. Finderscope is mounted INSIDE a 6" Newtonian. It utilizes that portion of the aperature normally blocked by the diagonal. The image is output through the side of the tube and both finder and main image are viewed simultaneously. Coaxial finderscope for either a Newtonian or Cassegrain configuration uses a small objective lens mounted at the center of the telescope tube's open end, along with a movable diagonal. Quick-change mountings for a focuser and finder allow shifting them between telescopes. Telescope finder rings are made from Lucite and grip the finder more securely than the "three-screw method". Small catadioptric telescope has its own handy finder, but without the separate tube and mounting rings of a conventional finderscope. A star-centering device for guidescopes makes it easier to bring a suitable star onto the crosshairs of the guiding eyepiece. Build a "Skywalker". Consists of two "Telrad-like" finders in one housing so that two people can see a target image projected on the same point in the sky. Ideal for naked-eye observing when one knowledgable person is leading a novice in locating celestial objects. A pulsating Telrad finder. Modify a viewfinder of the Telrad type to cause the illuminated bull's-eye to pulse on and off. This makes it easier to see stars of 4th, 5th, and 6th magnitude. Astronomy through your finder. Using commercially available parts to attach a 35mm SLR camera body to a 50mm telescope finder for taking astrophotos. Simple, hand-held sky pointer for two people allows a novice to be guided to a specific celestial object. The tunable finder telescope. Made from PVC plastic pipe fittings and a surplus photocopier lens. Works with standard 1.25" eyepieces. Est. cost: $30. Homemade star diagonal for a guidescope has a movable mirror to center bright guide stars for astrophotography. Off-axis guider has a movable mirror to center bright guide stars for astrophotography. A light beam in place of a finderscope. Construct this light source which temporarily replaces an eyepiece and uses your telescope optics to point a beam of light (and also the telescope) at the object to be observed. Make your own Telrad pole finder. Use your Telrad sight and this special planisphere dial to align your telescope mount on the north celestial pole. A simple solar finderscope is made from a cardboard tube. Tip on using a riflescope as a finderscope. Telrad tip. Trick for using reflex sighting devices when the viewing conditions are less than ideal. Tip on using a monocular and the Telrad aiming device to locate dim objects. Miniature "Telrad" finder for use on binoculars (or telescope). Tele-tips. A collection of quick and simple remedies for telescope or observing problems. (1) Sky pointer. (2) Hale-Bopp filter. (3) Decollimating a guidescope when doing astrophotography. (4) Spring-loaded screws make finderscope adjustments easier. (5) Source of cheap aluminum telescope tubes. (6) Eyepiece glare blocker. (7) Unipod for steadying the observer's head. (8) Bungee cord support for binoculars. (9) Simplified Cheshire collimation device. (10) Variable-aperture mask for Newtonian reflector. (11) Reversing star charts with a mirror so they match the telescope image. Test report on seven unit-power (1X) finders, how they work, and tips on their use. Tip on using a single piece of 4" plastic pipe in place of two standoff rings for attaching a finder. Tip on using the finder cross hairs to slew a telescope (on one axis) to locate a desired object. Fabricate a thin prism (from glass plates and clear casting resin) which is placed in front of a finderscope and makes Polaris appear to lie exactly at the north celestial pole. Tips on attaching a monocular to a telescope for use as a finder. Tip for a simple solar viewfinder that utilizes the base for a Telrad finder. Build a finder with an 8-degree field. Uses a 50mm objective from an old binocular, tubing, wood, and eyepiece. Tip: Add an extra set of finder rings to your finder scope. Use them as a boresight or peepsight finder to align telescope on a star before looking through the optical finder scope. A precise finder for sun telescopes relies on a series of 5 disks, each with a different size hole in them. Dobsonian developments. The state-of-the-art in Dobsonian telescopes. Includes details for making and using alt-azimuth setting circles. Includes descripton of a binocular finder scope. A simple sighting tube for the Astroscan 2001 telescope. | |||||||||
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