Tele Vue 31 mm Nagler Type 5 Eyepiece

Tele Vue 31 mm Nagler Type 5 Eyepiece

This is the 31 mm focal length Nagler design eyepiece from Tele Vue, with the 82° apparent field of view, and amazing optical quality you expect from Tele Vue. When designing the Naglers, the aim was to approach the wide-angle perspective of naked eye vision, while maintaining the highest degree of sharpness, contrast, and viewing comfort.

With the 31 mm, the unique 6-element design using four exotic glasses, maintains the contrast advancement of the Type 4s while achieving a true field area 82% larger than the 22 mm Type 4! Owners of fast Dobsonian/Newtonians can enjoy a larger true field, free of secondary shadowing, than ever before.

Tele Vue's philosophy of "showing no field unless it's fine" stresses full field image quality as the ingredient for impressive views. Blackened lens edges, anti-reflection threads and rubber eyeguards deliver maximum contrast. Adapter skirts for 2" focusers on larger 1¼" models and rubber grip rings are additional Tele Vue "firsts". 100% full field visual inspection on their own in-house flat-field test instruments guarantees the performance of every Tele Vue eyepiece.

Tele Vue Nagler Eyepiece Specifications:

• Focal Length: 31 mm

• Barrel Size: 2"

• Apparent Field Of View: 82°

• Eye Relief: 19 mm

• Weight: 2.20 lb

• Effective Field Stop: 42 mm

• SKU Number	TLV-EN5-310
  Model Number	EN5-310
  Standard or Speciality Eyepiece?	Standard Eyepiece
  Barrel Size	2"
  Eyepiece Focal Length (mm)	31mm
  Eyepiece Series	Tele Vue Nagler
  Eye Relief	19 mm
  Apparent Field of View	82°
  Adjustable Eye Relief?	No
  Waterproof?	No
  Threaded for Filters?	Yes, 2"
  Number of Eyepiece Lens Elements	6 in 4 Groups
  Field Stop (ex 8 mm, list all in kit with comma space between each)	42 mm
  Dimensions	Height: 5.4" (137.16 mm), Diameter of Black Barrel: 3.3" (83.82 mm)
  Weight (ounces)	35.2 oz