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Eyepieces
for
Telescopes

 

Eyepieces in general

This is a short article.  You will need "eyepieces" for your telescope.   Here's the way it works.  The optical elements of the scope -- lens(es) and/or mirror(s) focus the image of whatever you are viewing onto a spot.  At this spot, you must insert another lens element -- an eyepiece -- so named because you put you eye up to the eyepiece to see whatever the scope is seeing.

Eyepieces are the subject of endless discussion, debate, agreement, and disagreement among amateur astronomers.  You can purchase eyepieces for a few bucks each and you can spend hundreds of dollars for one eyepiece.

Here are links about eyepieces.  Read and read some more.  I will not try to explain eyepieces.

  • Good tutorial on eyepieces.
  • Another good tutorial.
  • Discussion for beginners.    Good discussion, no pictures.
  • Dealers and manufacturers.  Go to these sites and explore the site for eyepieces and eyepiece information.
    • TeleVue eyepieces.  Most expensive, generally considered the best.
    • University Optics.  Check out their orthoscopic eyepieces.
    • Meade Corporation.  Click on Product Guide, scroll down to Accessories for their eyepieces.
    • Orion.  Click on Accessories then click on Eyepieces.
    • Celestron.
  • Finally, read about the Barlow lens -- it's a must-have accessory.  This article is on the Orion Telescope's site -- you will find Barlows made by many manufacturers.

My eyepieces

Here is a photo of the inside of my eyepiece case -- these are my eyepieces -- and I really don't need all of these.

eyepce case.jpg (101527 bytes)

 

In this case, you see:

  • Eleven eyepieces (about seven too many)
  • Three Barlows
  • A lot of filters
  • A compass
  • A red LED flashlight

Here is a chart showing the eyepieces I own and the magnification that each eyepiece provides with my XT-8 scope.

Eyepiece Magnification with the XT-8 (1200mm focal length) Remarks
Eyepiece alone Eyepiece with 2X Barlow
TeleVue Panoptics 32mm 38X 76X Nice, wide views
Meade SuperWide 18mm 67X 135X This is the eyepiece I start with, then switch to higher power.
TeleVue Nagler 7mm 171X 242X  
TeleVue Nagler 5mm 240X 480X (not usable) Favorite scope for planets
University Optics orthoscopic 9mm 133X 266X  
University Optics orthoscopic 5mm 240X 480X (not usable)  
University Optics orthoscopic 4mm 300X 600X (not usable) Favorite scope for planets
Orion Epic ED 14mm 86X 172X  
Orion Epic ED 9.5mm 126X 252X  
Orion 20mm, 2-inch 60X 120X Very wide views of the sky
TeleVue 2X Barlow n/a n/a  
TeleVue 3X Barlow n/a n/a  
Orion 2X Barlow, 2-inch n/a n/a  
Meade 20mm reticle eyepiece Special use eyepiece -- has illuminated crosshairs in it, used for calibrating scope.
Magnifications in this color are not usable -- too much magnification for the scope.    
Eyepieces in this color are my favorites.    

 

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