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Solidly in the mid-magnification range for most amateur telescopes, the 20mm is a true workhorse for visual observers. If you love deep sky observing, eyepieces in this focal length range not only give healthy increases in magnification, but the contrast enhancement of giving a darker background sky can make all the difference of how galaxies and nebulae appear under suburban skies.

Comfort, Quality, Value. The Explore Scientific 52° LER Series mid-range focal length eyepiecesare excellent flat-field multi-element oculars that can transform your visual astronomy experience. With an apparent field of view of 52 degrees, these eyepieces offer incredible value in a very nice eyepiece. Expect exceptional quality and value versus a comparably priced Plossl.

These eyepieces are the choice for observers wearing glasses - with excellent performance and durability. The rubber inlet and the foldable eyecups make handling and using in the field easy. The patented EMD"-coating produces high contrast images and prevents reflexes and ghosting. The argon purging effectively prevents internal fogging, and you don´t have to deal with dirt, fungus or cleansing fluids getting between the lenses. The eyepieces are sealed - this makes sure you will be able to enjoy these eyepieces for many years to come.


SPECIFICATIONS

• Large eye distance, large field and great image sharpness
• Excellent viewing position for people with glasses
• Excellent field sharpness even with fast optics
• 52° apparent field of view
• Argon-purging prevents internal fogging, the sealing facilitates cleaning
• Patented EMD-coating to maximize contrast
• Blackened lens edges to avoid reflexes
• All eyepieces of this series are parfocal
• Stainless steel barrel with conical security cutoff
• Dust covers and protective bag included

Technical Data