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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
William Optics M48 Push-in Nosepiece for WO 2" Diagonals & UniGuide Scope
William Optics M48 Push-in Nosepiece for WO 2" Diagonals & UniGuide Scope
William Optics M48 Push-in Nosepiece for WO 2" Diagonals & UniGuide Scope
William Optics M48 Push-in Nosepiece for WO 2" Diagonals & UniGuide Scope
William Optics M48 Push-in Nosepiece for WO 2" Diagonals & UniGuide Scope

William Optics M48 Push-in Nosepiece for WO 2" Diagonals & UniGuide Scope

by William Optics
SKU WO-WD-DIG2A
$39.00 - $39.00
$39.00
$39.00 - $39.00
$39.00
Price Match Policy!
  • Connects M48 Threaded Accessories to 2" Push-in Focusers
  • Female M48 Threads for 2" Filter Attachment
  • Adds a Fixed 36 mm of Optical Length
  • Male M48 Threads on Camera Side
  • Designed for William Optics 2" Diagonals & UniGuide Scope
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • William Optics M48 Push-in Nosepiece for WO 2" Diagonals & UniGuide Scope

    The William Optics M48 Push-in Nosepiece creates a secure, all-threaded connection between your M48-format imaging gear and a standard 2" diagonal or focuser, adding a precise 36 mm to your optical path. This adapter eliminates the potential for tilt from compression rings or set screws by providing a rigid M48 male thread for your camera and a standard 2" push-in barrel for your telescope.

    Secure M48 Threading for 2" Diagonals and UniGuide Scopes

    This nosepiece is engineered to solve a common flexure point in imaging trains. Instead of relying on a simple slip-fit nosepiece, you can thread your camera or filter wheel directly onto the adapter's M48 male threads for a solid, orthogonal connection. The female M48 threads on the telescope side also allow you to mount a 2" filter inside the barrel, placing it at the front of your imaging train.

    A Fixed 36mm Optical Path for Back Focus Calculations

    For astrophotographers, every millimeter of the optical path counts. This nosepiece adds a known, fixed optical length of 36 mm, a critical value for achieving correct spacing with field flatteners and focal reducers. This precision removes the guesswork associated with variable-length adapters, ensuring you can accurately calculate and maintain your required back focus distance.

  • What is the primary use for the William Optics M48 Push-in Nosepiece?

    Its main purpose is to attach an accessory with M48 female threads, like a camera or filter wheel, to a standard 2" push-in focuser or diagonal. It replaces standard smooth-sided nosepieces with a more secure threaded connection, which is especially important for preventing tilt with heavier imaging equipment.

    How does the 36mm optical length of this M48 nosepiece affect my imaging train?

    The 36 mm optical length must be included in your total back focus calculation. If your focal reducer or flattener requires 55 mm of back focus, this adapter will consume 36 mm of that distance, leaving you with 19 mm for any remaining spacers and your camera's sensor depth.

    Can I attach 2" filters to this William Optics nosepiece?

    Yes. The light-in side of the adapter features M48 (female) threads, which is the standard threading for 2" astronomy filters. You can thread a filter directly into the barrel before inserting it into your diagonal or focuser.

    Will this M48 nosepiece work with my non-William Optics 2" diagonal?

    Yes, most likely. While it is specifically designed for William Optics diagonals and the UniGuide scope, the male 2" push-in barrel is a standard size and should fit any focuser or diagonal that accepts standard 2" eyepieces and accessories.

    What is the advantage of this M48 threaded nosepiece over a standard 2" smooth-sided nosepiece?

    A threaded connection provides superior security and alignment. Key advantages include:

    • Reduced Tilt: Eliminates the possibility of sensor tilt that can be introduced by set screws or unevenly tightened compression rings.
    • Security: Prevents your expensive camera or filter wheel from accidentally slipping out of the focuser.

    Is this William Optics adapter suitable for connecting my DSLR to my SCT's 2" diagonal?

    Yes, this is an excellent application. You would need an M48 T-ring for your specific DSLR model. The signal path would be: SCT -> 2" Diagonal -> This M48 Push-in Nosepiece -> M48 T-Ring -> DSLR Body. Just be sure that your SCT has enough inward focus travel to accommodate the 36 mm path length of the adapter plus your other components.

  • SKU WO-WD-DIG2A
    Light-In Side (Telescope) M48 (female) / 2" Push-in (male)
    Light-Out Side (Camera) M48 (male)
    Optical Length 36 mm

    • M48 Push-in Nosepiece for WO 2" Diagonals & UniGuide Scope

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  • William Optics 2-Year Warranty