APM 18mm Ultra Flat Field Eyepiece

APM 18mm Ultra Flat Field Eyepiece


In Stock

APM 18mm Ultra Flat Field Eyepiece delivers high quality in a very compact design and features over-sized lenses for a large 65° field of view with a 20mm eye relief.

In Stock


APM 18mm Ultra Flat Field Eyepiece

APM 18mm Ultra Flat Field Eyepiece delivers high quality in a very compact design.  This eyepiece removes field curvature at the edge, resulting in a flat, distortion-free image, and features over-sized lenses with a large 65° field of view with 20mm eye relief. The adjustable eye cups allow for comfortable viewing, making them perfect for eyeglass users. All lenses (8 lenses in 5 groups) have a broad-band multi-coating (FMC) and blackened lens edges, and the plug-in sleeve is equipped with a thread for 1.25″ filters.


  • 1.25″ connector with integrated filter thread
  • Large upper field lens for comfortable optical insight
  • Suitable for eyeglasses users
  • Border sharp Image
  • High quality multi-coating
  • Can be used universally


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Package Includes:

  • 18mm Eyepiece
  • Lens Caps

Product Specifications:

Type of eyepiece: Ultra Flat Field
Focal length: 18mm
Field of view: 65°
Eye relief: 20mm
Eye guard: Rubber foldable for eyeglass wearers
Lenses / groups: 8 / 5
Field stop: 23.4mm
Coating: Multi-coated
Barrel size / Filter thread: 1 1/4″ with filter thread
Diameter: 27mm
Height: 45mm (without barrel)
Weight: 4.8 oz