Meade 12 mm MA Astrometric Eyepiece - Wireless - 1.25"

  • Focal Length: 12 mm.
  • Apparent FOV: 40 degrees.
  • Barrel Size: 1.25 inches.
  • Eye Relief: 5 mm.
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  • Regular price $99.00
  • $79.99
  • You save: $19.01 (19%)

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Meade 12 mm MA Astrometric Eyepiece - Wireless - 1.25"


The Meade 12 mm MA Astrometric Eyepiece is a high-precision eyepiece for a wide range of astronomical measurements. The laser-etched reticle is evenly illuminated by an internal red LED, with illumination intensity variable from bright to faint. Four types of measuring scales are included, for measuring double star angular separations, position angles, planetary diameters, and lunar crater diameters, as well as many other useful astronomical measurements.

The 3-element Modified Achromatic optical system yields sharp images across the full field of view and optics are coated for increased light transmission. The eyepiece's diopter adjustment allows for sharp focusing of the reticle to the observer's eye, and a rubber eyecup (foldable for eyeglass wearers) shields the eye from extraneous light. The MA 12 mm Astrometric Eyepiece is supplied complete with wireless illumination control and internal batteries.


Case IncludedNo
Dust Caps IncludedYes
Eye Guard IncludedYes
Eye Relief10mm or Less
Eyepiece Apparent FOV40 degrees
Eyepiece Eye Relief5mm
Eyepiece Focal Length12mm
Eyepiece Special FeatureIlluminated
Free ShippingYes
Lens Elements & Groups3 element
ModelMeade Modified Achromatic
Optical DesignModified Achromatic
Warranty1 Year Warranty


  • Meade 12 mm Wireless Astrometric Eyepiece.
  • Scales.
  • Complimentary Batteries.
Customer Reviews
4.8 Based on 6 Reviews
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John F.
United States
Order was processed and shipped quaickly. Great service.

Fun accessory to use.

United States
A must have tool.

A very useful eyepiece for precise polar alignment,planetary features and binary stars separation and angle measuring. Wish it had 2 dust caps instead of one. A pulse feature could be useful for low magnitude close binaries.

United States
Great specialty eyepiece

The Astrometric eyepiece is performing as I expected. It makes centering an object very easy. Measurements are very easy to make and angles are easy to get.

United States
12 mm illuminated reticle eyepiece

I had a 40 year old Meade 12mm IR eyepiece and could no longer get bulbs for it. I purchased the new one and I feel the eyepiece is okay but the LED illuminated reticle cannot be dimmed down enough to my liking. It is useable, but I am used to the circles on my Telrad that has infinite LED adjustability (not to mention my 40 y/o eyepiece). I feel you need this feature for fainter stars. Otherwise it is okay.

Useful, but be forewarned

Overall, I like this eyepiece. The longer focal length makes it much more comfortable for most work. It can serve for guiding, which removes one extra eyepiece from my case. As the previous viewer noted, you can take a lot of measurements with this. That makes it a fun and interesting accessory. However, there is one caveat. The eye relief is marginal and indeed just on the edge of not being enough, especially if you wear glasses for observing. Fortunately, I can remove my glasses when needed.

Astrometric Workhorse!

This is one of our most used and useful eyepieces in our collection. Not only does it help us to align the telescope to a high precision, but the simple and immediate measurements it allows us to do are great! Example: orient the eyepiece so that the 50 mark central ruler matches sidereal motion. Find a star near the celestial equator. Place it at 0 on the ruler. Turn off the telescope's tracking and time how long it takes the star to get to 50. Repeat two more times & take an average. The Earth rotates about 15 arc secs. per 1 second of time. Multiply your measured time by that rotation rate and you'll get angular distance that the eyepiece covers in your scope. Divide that by the 50 divisions and now you'll have an angular distance per division of the reticule. Want to measure the size of a crater on the moon, a prominence on the sun, or the angular distance between two stars? This is your eyepiece! Next add the protractor capabilities to measure angles between binary stars and you'll soon be doing more at your telescope than just saying ohh and ahh at what it shows! I highly recommend it!