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Pegasus M68 Male to M48 Male Adapter

Pegasus M68 Male to M48 Male Adapter

by Pegasus Astro
SKU PEG-ADAPT-M68M-M48M
CA$39.00 - CA$39.00
CA$39.00
CA$39.00 - CA$39.00
CA$39.00
Price Match Policy!
  • Connects M68x1.0 accessories to M48x0.75 components
  • M68 male thread with 1.0mm pitch and 4mm length
  • M48 male thread with 0.75mm pitch and 4mm length
  • Internal M42x0.75 threads for 2" filter mounting
2 in stock
Qualifies for FREE Shipping in Canada on orders over $500.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Adapter M68 Male to M48 Male

    This adapter provides a robust M68 Male to M48 Male connection, featuring a 1.0mm pitch on the M68 side and a standard 0.75mm pitch on the M48 side. Both male threads have a 4mm length for secure engagement, and the adapter includes an internal M42x0.75 thread for mounting standard 2-inch filters directly within the optical path.

    M68 to M48 Conversion with a 4mm Thread Length

    This adapter solves a common connection problem, allowing you to attach modern M48 accessories like field flatteners, reducers, or cameras to focusers and correctors that use the larger M68x1.0 standard. The 4mm thread length on both the M68 and M48 sides ensures a solid, non-flexing fit without consuming excessive back focus, which is critical for maintaining the correct spacing in an imaging train.

    Integrated M42x0.75 Internal Threads for Filters

    A key feature of this adapter is the integrated M42x0.75 female thread on the inside of the M48 barrel. This allows you to install a standard 2-inch mounted filter inside the adapter itself. Placing a filter at this point in the optical train is often more convenient than using a filter drawer, especially in compact setups or when connecting directly to a camera nosepiece.

  • What is the primary use for this M68 to M48 adapter?

    This adapter is primarily used to connect imaging equipment with a female M48x0.75 thread (like many field flatteners, off-axis guiders, or cameras) to a focuser drawtube or corrector that has a female M68x1.0 thread. It acts as a step-down converter for your optical train.

    How do I use the internal M42 thread on the M68 to M48 adapter?

    The internal M42x0.75 thread is designed to accept standard 2-inch astronomy filters. You can simply screw a filter directly into the inside of the adapter's M48 side, placing it securely within your imaging train without needing a separate filter cell or drawer.

    Will this adapter work with my Sky-Watcher Esprit focuser?

    Many Sky-Watcher Esprit models terminate in a female M68x1.0 thread. This adapter allows you to convert that output to the more common M48x0.75 male thread, making it compatible with a wide range of M48-based correctors and accessories. Always confirm the thread specification of your specific focuser model before purchasing.

    Is the M48 thread on this adapter the same as a 2-inch filter thread?

    No. While they are close in diameter, they are different standards. The M48 thread on this adapter has a 0.75mm pitch (M48x0.75). Standard 2-inch filters use an M48 thread with a 0.6mm pitch. The internal M42 thread is what you would use for 2" filters, as most are mounted in M42 threaded cells despite the 2" barrel size designation. This is a common point of confusion.

    What is the optical length of the M68 to M48 adapter?

    While the thread length is specified as 4mm, the exact optical length (the amount of back focus it consumes) is not specified. However, as a male-to-male adapter, it is designed to be as thin as possible, typically consuming only a few millimeters of back focus once threaded into place.

    Can I use this adapter to connect my ZWO camera to a large format corrector?

    Yes, this is a perfect application. If you have a corrector that outputs an M68x1.0 female thread and you need to connect an M48-threaded accessory like a ZWO filter wheel or camera, this adapter bridges that gap. The internal M42 thread also provides a convenient spot for a UV/IR cut or light pollution filter before the camera sensor.

  • M68 Male Thread Pitch 1.0mm / 4mm length
    M48 Male Thread Pitch 0.75mm / 4mm length
    Internal Thread M42 x 0.75mm

    • Adapter M68 Male to M48 Male

      × 1

  • Standard 2-Year Manufacturer Warranty