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William Optics 1.25
William Optics 1.25
William Optics 1.25

William Optics 1.25" 90-deg Erecting Prism Diagonal with Helical Focusing

$ 31.67

Availability: 100 in stock
  • Item Diameter: 1.25 in
  • Brand: William Optics
  • Condition: New
  • All returns accepted: ReturnsNotAccepted
  • Type: Prism

    Description

    William Optics 1.25" 90-deg Erecting Prism Diagonal with Helical Focusing. Condition is "New". Shipped with USPS First Class.
    New from William Optics, this 1.25" 90-degree erecting-prism diagonal # D-EP90-125 gives correct right-side up images for terrestrial or celestial observing with any telescope (except Newtonian reflectors). The erecting prism in this diagonal is made of high quality BAK4 glass polished to a high surface accuracy and with anti-reflection coatings that give bright images and reduced ghosting.
    The diagonal features a helical focusing mechanism for fine adjustment of up to 15 mm in the eyepiece holder. The inside of the erecting diagonal is matte blackened to reduce internal stray light reflection and keep image contrast high. Precision machined from aluminum and black anodized with a smooth finish, this diagonal is threaded for standard 1.25" filters and features a tapered barrel design.