Explore Scientific 2" Field Flattener - ES-FFEDAPO-00 -



  • 2-Inch Accessory
  • Use with ED Refractors 
  • Corrects Natural Field Curvatures
  • Edge-to-Edge Crisp, Sharp Images 
  • 45 mm Back Focus



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  • Regular price $159.99

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Explore Scientific 2" Field Flattener - ES-FFEDAPO-00 -

The 2-Inch Field Flattener for ED APO Refractors by Explore Scientific: 

One of the truths of refractor optical design is a curved focal plane. While the center of the view remains crisp and clear the edges of that view become increasingly out of focus. Even the most precision ground optics will exhibit curvature but while this is typically not an issue for the observing astronomer (whose target is typically in the center of the field of view) blurry edges can be a huge issue for the astrophotographer. With the addition of this field flattener, aberrations that are caused by this curvature are corrected! Your images will be tack sharp from edge to edge. Created using fully multi-coated optical glass to maintain optical integrity, the Explore Scientific will slide securely into the 2-inch opening of your telescope.

  • The Explore Scientific 2-Inch field flattener was designed to be compatible with any ED refractor that will accept 2-inch accessories.
  • Corrects the natural field curvature exhibited by refractor optical designs.
  • Crisp, sharp images from edge to edge - a must have accessory for the astrophotographer.
  • 45 mm back focus

DSLR USERS, PLEASE NOTE this field flattener will NOT work with your DSLR and standard T-Ring, as the back focus is 45mm. If you use a Canon or Nikon DSLR, please use one of the options below:

Field Flattener for Nikon users: ES-FFEDAPO-NI

Field Flattener for Canon users: ES-FFEDAPO-CA


OPT Product Number: ES-FFEDAPO-00


Accessory TypeFlattener
Barrel Size2"
Free ShippingYes
ManufacturerExplore Scientific
WarrantyLifetime Warranty