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Overview of the Orion 125quot Pentaprism Diagonal
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=mJEl6Rba_VU
The Orion Pentaprism Diagonal is ideal for use with the Orion Premium Linear BinoViewer, because the combination renders an upright, non-mirror-reversed image. • PRODUCT PAGE: • For our US and Canadian customers - http://bit.ly/2HNWDu6 • The Orion Pentaprism 90-Degree Diagonal is a non-inverting, non-reversing 1.25 diagonal with a 90-degree viewing angle. Unlike a star diagonal, it does not produce a mirror-reversed image, which can make navigation and referring to star maps while observing with your telescope difficult. But unlike a correct-image diagonal, there is no image degradation caused by the ridge line where prisms intersect, which especially affects high-power viewing. It is the only diagonal that can be used with the Orion Premium Linear BinoViewer to render an upright, non-mirror-reversed image through a telescope. So we highly recommend it for viewing with the Premium Linear BinoViewer, especially for terrestrial applications for which a correctly oriented view is a must. • As its name implies, the Pentaprism diagonal consists of a pentagonal-shaped prism, which is made of BK-7 glass that is multi-coated on its two transmitting surfaces and dielectric coated on its two reflective surfaces, for maximum light transmission to the eyepiece. The pentaprism is housed in a black-anodized aluminum body that features a non-marring 1.25 compression ring collar with a large knurled thumbscrew, and a tapered 1.25 barrel that is threaded for use of filters. • The Orion Pentaprism diagonal has an optical path length (backfocus requirement) of 120mm, and a generous clear aperture of 29mm. One nice feature of the Pentaprism diagonal is that it causes no vignetting, even when used with long focal length, wide-angle eyepieces. When used in combination with just an eyepiece, the Pentaprism diagonal will render an upside-down image, but not mirror reversed as you get with a standard star diagonal. That can be advantageous for telescopic viewing with star charts, since you need only rotate the star chart to match the view in the eyepiece. A mirror-reversed eyepiece view, on the other hand, requires some mental gymnastics when referring to a star map! While the Pentaprism is the ideal diagonal to use with the Orion Premium Linear BinoViewer, note that it may not provide a correctly oriented view with other binoviewers, which unlike the Premium Linear BinoViewer typically do not incorporate an image erecting lens system. • To be notified when new videos are added to our growing library of stargazer how-to videos, subscribe to the Orion channel! • / oriontelescopes • Visit http://www.telescope.com to find high quality products for amateur astronomers. • If you have any questions about any of our telescopes, binoculars, or accessories, please don't hesitate to contact one of our trained and knowledgeable customer service representatives. • http://www.telescope.com/custserv/con... • To learn more about Astronomy, please visit the Orion community where you can find Articles, Images, Videos and More! • http://www.telescope.com/catalog/comm... • Since 1975 Orion Telescopes Binoculars has been offering telescopes for sale direct to customers, with an unswerving commitment to best quality products, value and unmatched customer care. Our 100% satisfaction guarantee says it all. Orion offers telescopes for every level: Beginner, Intermediate, Advanced, and Expert. From our entry level beginner telescopes for amateur astronomers to our Dobsonian telescopes to our most advanced Cassegrain telescopes and accessories, you can find the best telescope for you.
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