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Boost the flat-field imaging performance of your EON refractor with this handy Field Flattener. Designed for use with Orion EON 115mm and EON 130mm ED Triplet (EDT) refractor telescopes, the Orion 3" Field Flattener minimizes field curvature distortions that can otherwise elongate stars at the edge of the field-of-view. With the Field Flattener installed, every exposure will exhibit tack-sharp stars all the way to the edge of the imaging field. Fully multi-coated, two-element optics ensure maximum light transmission to preserve image brightness and clarity. Since the Orion Field Flattener for EON 115/130 EDT Refractors does not act as a reducer, it will not alter the focal length of the EON telescope it's used with. One side of the Orion 3" Field Flattener for EON Refractors threads directly onto the 3" focuser of the EON 115mm or EON 130mm telescope, while the other end features wide, M48 threads to reduce vignetting when used with DSLRs and other large-sensor cameras. This secure threaded connection ensures a rigid connection with zero flexure. The M48 threads are wider than standard M42 "T-threads" found on some other field flatteners to minimize vignetting and provide better illumination of full frame camera sensors. Requires a compatible wide T-ring for use with DSLRs (sold separately). The 3" Field Flattener has a backfocus, or flange focal distance, of 51.5mm, though it is known to be effective at up to 5mm on either side (46.5mm - 56.5mm). It adds 88.8mm of mechanical length to an imaging train. The Orion 3" Field Flattener for EON 115/130 EDT Refractors weighs 1 lb., 2oz. Dust caps included.
Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-447-1001.
Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.
Binocular lenses and prisms are often coated with anti-reflective material to minimize light loss as light travels through the multiple optical surfaces of a typical binocular. Coatings help maximize the amount of light transmitted through each glass surface of a binocular, so as much light as possible reaches the observer's eyes to provide a bright and sharp image.
Good lenses are at least "fully coated," with a single layer of magnesium fluoride coating applied to each air-to-glass lens surface. Multiple layers of coatings are even more effective; the term "multi-coated" means one or more air-to-glass lens surface has multiple coatings. "Fully multi-coated" optics are even better, meaning all lens surfaces have multiple layers of anti-reflective coatings applied for maximum light transmission and optimal image quality.
Orion 3" Field Flattener for EON 115mm/130mm ED Triplet Refractor Telescopes Dust caps
Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.
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