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SVBONY 1.25" Telescope Focuser Adapter M42x0.75 for Reflector

SVBONY Telescope Focuser Adapter M42x0.75 for Reflectors - 1.25"

by SVBONY
SKU SV-F9163A
CA$20.00 - CA$20.00
CA$20.00
CA$20.00 - CA$20.00
CA$20.00
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  • Adapts M42x0.75 male threads to accept 1.25" eyepieces and accessories
  • Provides 37mm to 47mm of adjustable focus distance
  • Three locking thumbscrews ensure a secure, centered grip
  • Durable, all-metal anodized aluminum construction
  • Weighs only 70g (2.46oz)
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • SVBONY 1.25" Telescope Focuser Adapter M42x0.75 for Reflector

    The SVBONY 1.25" Telescope Focuser Adapter adds a critical 10mm of fine-focus travel to any reflector telescope with an M42x0.75 threaded focuser. This all-metal, 70g adapter allows you to precisely adjust focus from a minimum of 37mm to a maximum of 47mm, perfect for achieving sharp focus with cameras or non-parfocal eyepieces. Three locking screws provide a secure, non-slip grip on any 1.25" accessory, ensuring perfect alignment and stability throughout your observing session.

    Adjustable Focus: 10mm of Travel from 37mm to 47mm

    This adapter's primary function is to provide an additional layer of focus control. The helical focusing mechanism gives you a 10mm range of adjustment, variable between 37mm and 47mm of extension. This is invaluable for fine-tuning focus on planetary cameras without touching the telescope's main focuser, or for bringing different eyepieces to a sharp image without constantly racking the focuser in and out.

    Secure 3-Screw Grip for 1.25" Accessories

    Unlike simple adapters with a single set screw, the SVBONY M42 Focuser Adapter uses three thumbscrews to hold your 1.25" accessories. This three-point contact system ensures your eyepiece or camera is perfectly centered in the optical path and held firmly without any wobble or tilt. The durable, anodized all-metal construction guarantees longevity and resists wear from repeated use.

    SVBONY M42 Adapter vs. Fixed Adapters: The 10mm Advantage

    Standard M42 to 1.25" adapters offer a fixed optical length, which can prevent you from reaching focus with certain accessory combinations. The SVBONY adapter solves this problem by giving you 10mm of travel to work with. This flexibility can be the difference between a sharp, focused image and one that's just out of reach, making it a superior choice for imagers and visual observers who frequently swap equipment.

  • What is the main benefit of the SVBONY M42 Focuser Adapter's adjustable length?

    The main benefit is gaining an extra 10mm of fine focus travel (from 37mm to 47mm). This allows you to achieve critical focus with astrophotography cameras or bring non-parfocal eyepieces into focus without needing to make large adjustments with your telescope's main focuser.

    How do I use the 37mm to 47mm focus range on the SVBONY adapter?

    The adapter functions as a simple helical focuser. After threading it onto your telescope's M42 focuser, you can extend or retract the 1.25" barrel by twisting the main body of the adapter. This provides smooth, continuous adjustment within its 10mm travel range.

    Will this SVBONY adapter work with my 8" f/5 Newtonian reflector?

    Yes, provided your 8" f/5 Newtonian's focuser has a male M42x0.75 thread for accessory attachment. This adapter is specifically designed for reflector telescopes and is an excellent tool for adding fine-focus capability, which is especially useful at faster focal ratios like f/5.

    Can I use the SVBONY M42 adapter for attaching a planetary camera to my reflector for imaging Jupiter?

    Absolutely. This is an ideal use case. The adapter's fine focus control allows you to make the precise, minute adjustments necessary to get Jupiter's cloud bands perfectly sharp, something that can be difficult with a coarse primary focuser. The three locking screws will hold your camera securely and centered.

    What does the M42x0.75 thread on the SVBONY adapter signify?

    M42x0.75 is a standard thread size in astronomy, often called a "T-thread" or "T2-thread." The 'M42' refers to the 42mm diameter, and '0.75' refers to the 0.75mm thread pitch. This adapter has a female M42x0.75 thread, meaning it will connect to any focuser or accessory with a corresponding male thread.

    Why is the three-screw design on the SVBONY adapter important?

    The three-screw design provides a more secure and centered grip on your 1.25" accessory compared to a single screw. It prevents the eyepiece or camera from tilting, which is critical for maintaining good optical alignment, especially during astrophotography.

  • Female Thread M42*0.75
    Shortest Focus Distance 37mm
    Longest Focus Distance 47mm
    Net Weight 70g / 2.46oz

    • SVBONY 1.25" Focuser Adapter

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  • SVBONY Warranty Policy