1.25" 12mm 60 Degree Explorer Dual ED Eyepiece

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1.25" 12mm 60 Degree Explorer Dual ED Eyepiece Sky's the Limit are delighted to offer for sale this 1.25" 12mm 60 degree ED eyepiece. These eyepieces are absolutely brilliant - just Google "Paradigm Eyepieces" and read the reviews as they are the same eyepiece but branded "BST Explorer" for Trademark reasons . How good? This is what one of our customers wrote about the eyepieces he bought for his Pentax spotting scope: " But let me say, and read my lips, now I have tried Zeiss and Swarovski scopes and their zoom eyepieces, but none of them gave me such easy, bright and razor-sharp image as the Pentax with the Explorer eyepiece . In fact, I found them awkward to use with or without glasses but the 12 mm (and now the 18 mm) image instantly pops out on me." - Lars Giner August 2010 The eyepiece uses two separate ED (Extra-low Dispersion) glass elements of different glass types in its optical system to provide exceptional colour fidelity (with astonishingly low levels of chromatic aberration) so that the true colour differences between binary star pairs and planetary surface details are easily visible. It has a 60° field of view which is very flat and it is particularly recommended with telescopes with a f/5, or greater, focal ratio. It is uniformly sharp edge-to-edge, with markedly low astigmatism. Barrel distortion is essentially non-existent, eliminating the annoying “goldfish bowl” effect of distortion of the image which is often seen in some eyepieces when panning across a star field. Each air-to-glass surface in the Explorer eyepiece is fully multicoated for high light transmission and exceptional contrast. This high contrast makes it a good choice for splitting close binary stars, for examining low contrast lunar and planetary detail, and for finding small and faint planetary nebulae against a truly dark sky background. The lens edges are blackened to eliminate internal reflections and further improve contrast. As you would expect, the chrome barrel is threaded for standard 1.25” filters and has a capture ring to help reduce the chances of accidently dropping the eyepiece out of the focuser. Explorer eyepieces are parfocal, minimizing the amount of refocusing needed when changing eyepieces within the series. The eyepiece is set in a heavy rubber cladding which is grooved for easy grip. It has a soft rubber twist up eyecup which will make it unbelievably convenient to those of us who wear spectacles. The colour coded body rings and clear lettering print will help you find the right one in the dark. The eye lens is large in diameter (see photo) and with 13mm eye relief this makes it very comfortable and easy to look through. It weighs 7.0 ounces. Why buy from us? Have a look at our feedback and you will see the common theme is that we communicate well. Before a sale, during the processing of the transaction and after you have purchased an item you have access to a telephone number, email address and a fax number all connected to a human being who knows what you have been sold. We will do our utmost to make things as smooth as possible for you - especially if you are new to astronomy or to Ebay, we all had to start at sometime. There is no such thing as a silly question, please ask knowing that we will treat you courteously and respectfully as we hope you will want to come back to us if you choose to upgrade or buy some extras for your hobby. We will not leave you in the dark! Skies Unlimited is the Ebay trading name of "Sky's the Limit". Feel free to email any questions through Ebay or or ring us on . Other images were obtained from NASAJPL-Caltech. read more

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