Correction ASTRONOMY Aug 1993 (v.21#8) pg. 12
Getting to the focal point. A guide to the difficult choice of picking the right eyepiece for a telescope. Looks at eyepiece terminology and design choices. Includes a chart of currently available lenses and their prices.
ASTRONOMY Jun 1998 (v.26#6) pg. 91
Choosing an eyepiece for an astronomical telescope.
ASTRONOMY Sep 2003 (v.31#9) pg. 110
How to motorize the rack-and-pinion adjustment used to focus most amateur telescopes with a 1/2 rpm reversible motor. Estimated cost of motor: $14.
SCIENTIFIC AMERICAN Nov 1974 (v.231#5) pg. 128
How to make a guiding reticle which needs no artificial illumination.
SKY & TELESCOPE Feb 1982 (v.63#2) pg. 200
Tip: Make corrective lenses for binoculars, telescope eyepieces, etc. by cutting them from old eyeglasses which have been ground to your prescription.
SKY & TELESCOPE May 1983 (v.65#5) pg. 465
How to design telecompressors, a camera or telescope accessory that decreases focal length.
SKY & TELESCOPE Apr 1984 (v.67#4) pg. 367
Tip: Round, empty deodorant dispensers, lined with felt, make excellent storage cases for eyepieces.
SKY & TELESCOPE Dec 1984 (v.68#6) pg. 570
Tip: Use a 3-volt transformer to power an illuminated reticle eyepiece.
SKY & TELESCOPE Jan 1985 (v.69#1) pg. 75
An eyepiece primer. An overview of eyepiece design and terminology and a look at how eyepieces will affect a telescope's performance.
SKY & TELESCOPE Sep 1985 (v.70#3) pg. 286
Quick-change mountings for a focuser and finder allow shifting them between telescopes.
SKY & TELESCOPE Jan 1986 (v.71#1) pg. 98
Rollerless focuser similar to a "Crayford" mounting is built mostly of 1/8" aluminum channel. The drawtube rides against four Teflon pads.
SKY & TELESCOPE May 1986 (v.71#5) pg. 511
Tip: Use 50mm and 90mm camera lenses as eyepieces on a short-focus Newtonian reflector for extra-wide fields of view.
SKY & TELESCOPE Dec 1986 (v.72#6) pg. 557
A way to make large eyepiece focusers. The drawtube rides in an oversized fixed tube that is bolted to the telescope.
SKY & TELESCOPE Jan 1987 (v.73#1) pg. 95
Tips on making telescope crosshairs from spider web material.
SKY & TELESCOPE Jan 1987 (v.73#1) pg. 97
A homemade wide-angle eyepiece with an equivalent focal length of 35mm and an apparent angular field of 85-degrees. Some tips.
SKY & TELESCOPE Oct 1987 (v.74#4) pg. 424
Test of nine low-power eyepieces with focal lengths near 50mm (2"). Looks at what benefit (if any) can be gained by using these long-focus oculars on amateur telescopes.
SKY & TELESCOPE May 1988 (v.75#5) pg. 490
A star-centering device for guidescopes makes it easier to bring a suitable star onto the crosshairs of the guiding eyepiece.
SKY & TELESCOPE Jun 1988 (v.75#6) pg. 656
Make your own illuminated reticle from Plexiglas and two LEDs.
SKY & TELESCOPE Oct 1988 (v.76#4) pg. 425
Electric focusing mechanism for a telescope uses a small geared DC motor powered by six AA batteries. Est. cost: $20.
SKY & TELESCOPE Sep 1989 (v.78#3) pg. 317
Added Info SKY & TELESCOPE Apr 1990 (v.79#4) pg. 444
A pupil primer. Understanding the pupils of your eye is important to knowing which eyepieces or binoculars to purchase. It is also the key to some relatively unknown aspects of visual observing.
SKY & TELESCOPE May 1992 (v.83#5) pg. 502
Technique for checking for surface defects on individual lens components.
SKY & TELESCOPE Nov 1992 (v.84#5) pg. 578
Telescope equatorial mount, tube, focus mechanism and mirror cell built by a woodworker using a minimum of metal parts.
SKY & TELESCOPE May 1994 (v.87#5) pg. 92
Rx for the astigmatic skywatcher. Using correcting lenses to eliminate the need for wearing eyeglasses when using a telescope eyepiece.
SKY & TELESCOPE Sep 1995 (v.90#3) pg. 46
Tips on improving a cheap, small-aperture telescope by substituting a better eyepiece.
SKY & TELESCOPE Nov 1995 (v.90#5) pg. 95
Tip on using old eyeglass lenses as astigmatism correctors on a telescope.
SKY & TELESCOPE Jan 1996 (v.91#1) pg. 84
Simple technique to have all of your telescope eyepieces in focus (parfocal) immediately when inserted into the eyepiece holder.
SKY & TELESCOPE Jan 1996 (v.91#1) pg. 86
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.
SKY & TELESCOPE Mar 1996 (v.91#3) pg. 76
Cleaning eyepieces. Included in an article which tests 10 sets of eyepieces from 7 different suppliers.
SKY & TELESCOPE Apr 1996 (v.91#4) pg. 38
A rotatable position-angle wheel is fitted between the drawtube and the eyepiece of a telescope to help in locating a faint object.
SKY & TELESCOPE Jun 1996 (v.91#6) pg. 78
Tip on making an eyepiece shield (eyecup) from a cardboard tube and cloth sock.
SKY & TELESCOPE Apr 1997 (v.93#4) pg. 86
The Barlow lens. How this eyepiece accessory operates and a buyer's guide to what is available.
SKY & TELESCOPE Jul 1997 (v.94#1) pg. 59
Homemade friction focuser for an eyepiece is designed to operate like a conventional rack-and-pinion unit.
SKY & TELESCOPE Apr 1998 (v.95#4) pg. 98
Tip on making parfocalizing rings from plastic so that each eyepiece will be very close to focus when first inserted into an eyepiece holder.
SKY & TELESCOPE Oct 1998 (v.96#4) pg. 120
Budget eyepieces and Barlow lenses. How to make a set of high-quality eyepieces and Barlow lenses for a fraction of the cost of commercial units using surplus optics, hardware-store materials, and common tools.
SKY & TELESCOPE Feb 2000 (v.99#2) pg. 125, 129
Added Info SKY & TELESCOPE May 2000 (v.99#5) pg. 14
How to determine the focal length of a telescope eyepiece.
SKY & TELESCOPE Jun 2001 (v.101#6) pg. 125
Coping with atmospheric dispersion. Adding an extra element (color filter, wedge prism, etc.) to the optical chain (eyepiece) may lead to sharper views of the Moon and planets.
SKY & TELESCOPE Aug 2003 (v.106#2) pg. 124
Accurate focusing technique is copied from a professional (60") telescope. It involves the use of a moving pointer driven by a knurled focusing knob. Three (or more) visual focuses are taken, the value of the pointer noted each time, and then averaged. This average value is then used to focus by means of the pointer and scale, rather than by eye.
TELESCOPE MAKING #2 Winter 1978 pg. 7
Photos show two homebuilt "Crayford" eyepiece mountings.
TELESCOPE MAKING #11 Spring 1981 pg. 18
A simple, practical guide eyepiece uses an LED-illuminated pinhole as the guide point.
TELESCOPE MAKING #11 Spring 1981 pg. 28
Making an improved "simple" focuser and other tips for improving a Dobsonian or other low-cost Newtonian telescope.
TELESCOPE MAKING #13 Fall 1981 pg. 32
Tip: How to use a Barlow with a 2" 32mm eyepiece. Requires only a simple aluminum bushing in the extension tube.
TELESCOPE MAKING #15 Spring 1982 pg. 46
Diagram for homebuilt "Crayford" eyepiece mounting.
TELESCOPE MAKING #16 Summer 1982 pg. 4
A modified Cheshire eyepiece for collimation (aligning optical elements) in a reflecting telescope.
TELESCOPE MAKING #18 Winter 1982-83 pg. 22
Six eyepieces compared.
TELESCOPE MAKING #19 Spring 1983 pg. 30
The Nagler 13, a remarkable telescope eyepiece.
TELESCOPE MAKING #20 Summer-Fall 1983 pg. 50
A new flat field triplet eyepiece.
TELESCOPE MAKING #21 Winter 1983 pg. 14
Calculations shown for defining the "largest usable aperture" for a given combination of eyepiece, eye pupil opening and desired field of view.
TELESCOPE MAKING #22 Spring 1984 pg. 11
Eyepieces. A comprehensive look at the various designs for eyepieces.
TELESCOPE MAKING #25 Winter 1984 pg. 24
Eyepiece adapter that will accommodate eyepieces of any size between the Japanese standard and the American 2" diameter eyepieces.
TELESCOPE MAKING #28 Fall 1986 pg. 52
The Pretoria eyepiece. A new look at residual aberration correction in amateur telescopes.
TELESCOPE MAKING #29 Winter 1986-87 pg. 4
Tip: Parfocalize eyepieces by using plastic 35mm film canisters.
TELESCOPE MAKING #30 Summer 1987 pg. 46
In search of the perfect eyepiece. A comparison between the 16mm aspheric eyepiece and the Tucson 16mm spherical eyepiece.
TELESCOPE MAKING #33 Summer 1988 pg. 14
Building the "Master Plumber" focuser with epoxy-paper construction. How to convert a plastic toilet flush valve assembly into a 2" ultrashort focuser, complete with a 1.25" adaptor. Est. cost: $10.
TELESCOPE MAKING #36 Spring 1989 pg. 6
How to make an eyepiece coma corrector for a fast Newtonian reflector using off-the-shelf optics.
TELESCOPE MAKING #45 Summer 1991 pg. 30