Celestron Microguide 12.5mm

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Brand and Model:Celestron Microguide 12.5mm
Price ($USD):144 (Street)
Focal Length:12.5 mm
Barrel Size:
Apparent FOV:42.0 degrees
Field Stop Dia.:0.0 mm
Eye Relief:0 mm
Weight (lbs):
Description:From the celestron website:

This multi-function guiding eyepiece features a laser-etched reticle with a built-in battery illuminator. The eyepiece is a multicoated 12.5mm Abbe (4-element) Orthoscopic. Usage possibilities include: direct guiding on stars outside the center of the field of view; greatly improved off-axis guiding to capture much fainter, sharply focused guide stars without reducing limiting magnitude; and measuring position angles and separation of double stars. The Micro Guide Eyepiece is totally free of internal reflections and offers sufficient eye relief for the reticle to be viewed easily, even with eyeglasses. Its finely etched micrometer scale has gradations 50 microns apart and 15 microns wide. Included are: the eyepiece, built-in cordless illuminator with adjustable brightness control, batteries and instructions. The apparent field of view is 42°

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Celestron Microguide 12.5mm
This is a very useful eyepiece for the double star observer. My only complaint is that the reticle seems to be awfully "busy", or too many scales to fit the space available.

The important scales are the protractor around the edge ,and the linear scale for measurement of separation between objects. With these two scales, it is possible to make precise measurements of double (or multiple) stars using the method of Teague.

This is a Japanese manufactured eyepiece, and the quality is very eveident. The well applied coatings eliminate any distracting flare or internal ghosting. Stellar images are very crisp, as is typical of an Orthoscopic e.p.

I recommend this eyepiece highly for double star observations.

Overall Rating: 9
Optics:9 Value:9
Weight: 5 (Veritable Vote)
Link to this vote: http://www.excelsis.com/1.0/displayvote.php?voteid=432610

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