{"closeOnBackgroundClick":true,"bindings":{"bind0":{"fn":"function(){$.fnProxy(arguments,\'#headerOverlay\',,\'\');}","type":"quicklookselected","element":".ql-thumbnail .Quicklook .trigger"}},"effectOnShowSpeed":"1200","dragByBody":false,"dragByHandle":true,"effectOnHide":"fade","effectOnShow":"fade","cssSelector":"ql-thumbnail","effectOnHideSpeed":"1200","allowOffScreenOverlay":false,"effectOnShowOptions":"{}","effectOnHideOptions":"{}","widgetClass":"OverlayWidget","captureClicks":true,"onScreenPadding":10}

 22 of 47 
Orion Telescopes
Orion Field Flattener for EON 104mm ED-X2 Triplet Refractor
Accepted Payment
In Stock
  • Optimize the imaging performance of your Orion EON 104mm ED-X2 refractor with this specially designed Field Flattener
  • Eliminates inherent field curvature to provide an optically flat field without any misshapen stare near the edge of the field-of-view
  • 55mm backfocus distance works with most DSLR cameras without requiring additional extension rings
  • Includes interchangeable standard T-thread (M42) camera attachment adapter and a wider-format M48 adapter
  • Tapered 2" barrel securely fits in the EON 104mm ED-X2 focuser. For photographic use only

Learn more
Item #  05302

Designed specifically for use with the EON 104mm ED-X2, this handy device corrects field curvature to eliminate misshapen stars near the field edge and yield an optically flat field for optimized imaging performance.

To maximize imaging performance, a field flattener is needed to correct field curvature inherent in optically fast, short focal length refractor telescopes. Without a field flattener, refractors can exhibit bloated, misshapen stars near the edge of the telescope's field-of-view, which reduces astrophoto quality. As its name implies, using a field flattener produces a flat field with pinpont stars across the entire field of view for the very best astrophotography performance.  

The Field Flattener's 55mm backfocus distance is conveniently designed to work with most DSLR cameras without requiring any additional extension rings. A T-ring for the make and model of DSLR camera is required for attachment. Two interchangeable camera attachment adapters are included, one with standard T-threads (M42) and another with wider-format M48 threads. The wider M48 adapter allows optimal illumination of full-frame camera sensors, and is designed to minimize vignetting.

The machined aluminum housing of the Orion Field Flattener for the EON 104mm ED-X2 Triplet Refractor has a mechanical length of 50.2mm and features a tapered 2" barrel which securely fits in the EON 104mm ED-X2 focuser. Threaded for use with 2" imaging filters. Weighs 8.3 oz. For photographic use only.


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.

Product Support
Visit our product support section for instruction manuals and more

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.

{"closeOnBackgroundClick":true,"bindings":{"bind1":{"fn":"function(event, startIndex, itemCount, newItems) { QuickLookWidget.assignEvents(newItems); $(\".Quicklook > .trigger\", newItems).bind(\"quicklookselected\", function(event, source, x, y) {\'#_widget1950506725086\', event, source, x, y); }); }","type":"itemsloaded","element":".PagedDataSetFilmstripLoader > .trigger"},"bind0":{"fn":"function(){$.fnProxy(arguments,\'#_widget1950506725086\',,\'\');}","type":"quicklookselected","element":".Quicklook > .trigger"}},"effectOnShowSpeed":"","dragByBody":false,"dragByHandle":true,"effectOnHide":"fade","effectOnShow":"fade","cssSelector":"ql-category","effectOnHideSpeed":"1200","allowOffScreenOverlay":false,"effectOnShowOptions":"{}","effectOnHideOptions":"{}","widgetClass":"OverlayWidget","captureClicks":true,"onScreenPadding":10}