Tag Archives: equatorial mount

How to use an Equatorial Mount for Beginners

In this video, I will introduce new astronomers to the basics of using telescopes on an equatorial mount. How to use an Equatorial Mount for Beginners will explain the difference between an equatorial mount and an altazimuth mount and the advantages of each. How to determine the right ascension and declination motions using slow motion control knobs. Without getting too technical, I will describe the equatorial grid, right ascension, declination and how your equatorial mount follows these imaginary lines. I also walk through a simulation of how it would operate out in the field using Stellarium planetarium software.

Lin-Optics Equatorial Mount Maintenance Project

Lin equatorial mount disassembled for lubrication replacement.

My Discovery 8 EQ‘s equatorial mount is over 10 years old and it has been very ‘sticky’. It is a ‘Lin-Optics’ brand-name mount that I cannot find of any documentation on the web. Last week, I attempted to disassemble it to replace the lubrication but could not figure out how to remove the inner shafts.

This weekend, I finally had more time to look into the issue further. I needed a little bit more time to carefully figure out which set screws were meant to be removed, and which were meant to be tightened down in order to remove the shafts. It was like a rubik’s cube puzzle.

After an hour, I finally figured it out. The ascension shaft took me half as much time to figure out. I cleaned the parts with degreaser spray and wiped them clean with paper towels. If I could have collected the metal filings, I would say there was about a teaspoon of it. I then applied a generous amount of white lithium grease and put it back together.

Now, my mount is buttery smooth with the Newtonian telescope on it. It feels like I just bought myself a new mount. A fun project with long-lasting benefits.