Objective Lens, 72 73mm Telescope Cemented Doublet Objective Lens Achromatic DIY Optical Lenses Focal Length 280mm 700mm,for Doublet Convex Lens(73F400B)

★★★★★ 4.1 33 reviews

$76.59
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$76.59
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Free shipping Free 30-day returns

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Product details

Management number 219364894 Release Date 2026/05/03 List Price $30.64 Model Number 219364894
Category

=========High-concerned chemical : NoneModel Number : 72 73mm Cemented Doublet LensMaterial : Glass

  • Made optical glass with precision polishing, ensuring stable performance and long service life.
  • This 72mm & 73mm cemented doublet objective lens offers 280mm and 700mm focal lengths, designed as an achromatic optical part for DIY astronomical telescopes.
  • The achromatic cemented structure effectively corrects chromatic aberration, delivering sharp, high-contrast images for moon and celestial observation.
  • Made of high-grade optical glass with fine polishing, it ensures high light transmittance, low distortion and stable optical performance.
  • Two optional focal lengths satisfy different observation demands, suitable for telescope assembly, modification and upgrading projects.
  • Standard caliber and simple structure allow easy installation, making it an ideal core lens for astronomy enthusiasts and homemade telescopes.
Item Weight 1.76 ounces
Manufacturer Generic
Item model number OBFBVOBOB-35CD792E
Product Dimensions 3.94 x 3.94 x 3.94 inches
Manufacturer recommended age 1 - 1 months

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4.1 out of 5
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33 ratings | 14 reviews
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