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eyepieces & barlow lenses

Antares 25 mm 2" Speers-Waler Series 4 - 74° Eyepiece - 3404

Sky Instruments   ——   SKU: SIS-3404
$272.00 CAD
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Antares 25 mm 2" Speers-Waler Series 4 - 74° Eyepiece

Product Highlights:

  • Antares Speers-Waler Type Series 4 Eyepiece
  • 2" Barrel, 25 mm Focal Length, 6-Element Eyepiece
  • 74 Degree Apparent Field of View (AFOV)
  • 10 mm Eye Relief
  • Includes Eyeshield
  • Includes a Rubber Grip for secure handling
  • Optics are Fully Multicoated

The Antares Series 4, Speers-Waler Eyepiece is a superb quality eyepiece with a focal length of 25 mm and an AFOV of 74°. It is a 2" barrel type eyepiece with a 6-element optical lens design. This 25 mm 2" Speers-Waler Series 4 74° Eyepiece from Antares has a 10 mm eye relief. It includes an Eyeshield, a Rubber Grip for secure handling, and all the optics are Fully Multicoated.

Specifications:

Antares Model No: SW25S4
Barrel Diameter: 2"
Apparent Field Of View: Wide Angle - 74°
Focal Length: 25 mm
Eye Relief: 10 mm
Lens Elements: 6
Optical Design: Speers-Waler
Image Correction: High Quality, Series 4
Edge field curvature (546 nm): Sagittal, -0.22 mm, Tangential: 0.23 mm
Edge lateral color(420-656 nm): 0.009 mm
Chromatic focal shift (420-656 nm): 0.38 mm
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