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Home > Articles > How To > Advanced

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Obsession 25” f/5 – Rebuilding a Classic
By Dave Bonandrini 6/19/2010
Rebuilding an Obsession 25" using modern day techniques and hardware.

Customizing my ETX-125
By Steve Thornton 11/2/2009
Improving on a classic telescope

CCD Cameras and Signal to Noise Ratio
By Ron Wodaski 4/19/2008
Can't figure out how long of an exposure to take with your CCD camera? Want to know the real reasons behind how you figure this stuff out? Read on!

Shipping SCTs and Refractors
By Greg Nowell 9/21/2007
SCT correctors and refractors pose similar problems in shipping. Removal the SCT corrector, and the refractor's lens cell, makes shipping easier and more secure.

Disassembly of an SCT: Child's Play
By Greg Nowell 9/13/2007
A pictorial on how to disassemble a c8. Many owners are wary of touching their instruments, but it is sometimes the right thing to do. Watch seven year old Geoffrey show that "even a child can do it" (most of it).

Rebuilding NiCd Rechargable Battery Packs
By Dave Bonandrini 8/29/2007
Save some coin and save the Earth at the same time.

Testing Your Telescope Indoors
By Darren Drake 3/29/2007
Have you ever received a new, prized telescope only to have cloudy skies for what seems to be weeks at a time? Here's a very useful way to occupy that time...

Remake a Aluminum C-11 into a Carbon Fiber beauty
By Jerry Wise 3/16/2007
In an hour or two an Aluminum bodied Celestron can become a Carbon Fiber beauty with all the benefits of CF (along with longer cool down).

What’s inside a Meade LX200 14” SCT
By Jerry Wise 1/5/2007
Most of us consider the inside of an expensive telescope sacred ground with factory only admission. I’ve been a little scared of opening one up but the perfect opportunity came along recently.

Flocking a Celestron 9.25” SCT
By Jay Emirzian 6/18/2005
Here is a couple modifications you can accomplish to your SCT with a little time and effort. The cost is minimal and the results are astounding. Read on......

Reinforced Lapides Teegul Mount
By Jim Brown 5/11/2005
Have you ever wished you could use your Takahashi Teegul mount with those smooth slow motion controls for a medium-large telescope? So did I...

150' USB and RS232 Extensions
By Darrell Fichtl 12/2/2004
So you want to remote your telescope?

How to Catch an Aurora
By Michael Covington 11/25/2004
Author, Astrophotography for the Amateur

How to Subtract Dark Frames with Photoshop, Photoshop LE, or Photoshop Elements
By Michael Covington 11/25/2004
Michael A. Covington is the author of Astrophotography for the Amateur

Wild Card 006.1 "The Great Free Blanks Contest, PLUS!"
By Rick Shaffer 8/10/2004
Want some free Pyrex blanks? Then read this column to find out what kinda telescope you gotta promise to make with them!"

Wild Card 005.1 “John Kraus Passes On” PLUS “More on Achromats vs. Apos”
By Rick Shaffer 7/26/2004
Again, two topics for the price of one - plus a contest announcement!

Losmandy Titan Tips
By Robert Allevo 7/23/2004
If you own a Titan mount, you'll want to read this article...

DOB UPGRADE to a DSO "PUSH-TO"
By larry stange 7/21/2004
Unless skilled at Star hopping, finding DSO's can be rather hard with a basic Dob platform. Using a modified mouse on each of the Azimuth & Elevation axis, both can be coordinated together to indicate actual pointing of your Dob in an Astronomy program such as Skyglobe.

Wild Card 005 “Is There Any Other Way to Get Apo-Performance on an Achro-Budget?”
By Rick Shaffer 7/18/2004
Anyone who can afford one has an apochromatic refractor. And almost no one who has one wants to get rid of an apo. But no everyone would pic an apo over getting junior those braces he needs. Telescope designer Rick Shaffer presents some alternatives.

Collimation of Laser Collimators
By Floyd Blue 7/8/2004
Here is a project for an afternoon for those who want to take their collimation to another level. For those who dare to go where others fear to tread.

Wild Card 003.1 About the System(?) Strehl Ratio
By Rick Shaffer 6/27/2004
Telescope designer Rick Shaffer sharpens up his pencil and points out how you can use the Strehl Ratio as a way of analyzing the perfomance of an entire optical system.

AstroPro JMI Wheely Bar Stability Modification Project
By Paul Atkinson 6/23/2004
If You Use Wheely Bars...You'll Love This Simple Modification!

Regreasing the Giro mount
By Oldfield SO 6/18/2004
Your Giro becomes less smooth than before? Read on to see how to fix it.

Matching a CCD Camera to a Telescope
By Jim Burnell 6/18/2004
This article is the first installation in a series of articles about CCD imaging and setting up a CCD imaging system. During the course of the year I travel and speak on CCD imaging and people frequently ask about how to get started and how to choose the components of an imaging system. In this series of articles I will address the most common questions. This first article talks about pixel size.

CI-700 Hercules
By Jim Fusco 6/1/2004
Exceeding the mount limitation.

Wild Card 001.1 “More Than You Ever Wanted to Know about Eyepieces, Coma, and Astigmatism”
By Rick Shaffer 5/31/2004
Fearing that there’s not enough boredom in the World today, telescope designer Rick Shaffer inflicts his theory on the cause of so many “balloon-filled telescope views” on an unsuspecting World.

Planetary Imaging with a Webcam and an SCT
By Rod Mollise 5/18/2004
The planets are tough. Tough to observe visually and especially tough to image. Those of you who’ve got a few Mars oppositions under your belts know what I’m talking about.

A Checklist for Photographing the Transit of Venus
By Michael Covington 5/16/2004
Michael A. Covington is the author of Astrophotography for the Amateur and other books.

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