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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.
Baader Planetarium Adapter M48a to T-2a
Baader Planetarium Adapter M48a to T-2a
Baader Planetarium Adapter M48a to T-2a

Baader Planetarium Adapter M48a to T-2a

by Baader Planetarium
SKU BAA-2958554
$45.00 - $45.00
$45.00
$45.00 - $45.00
$45.00
Price Match Policy!
  • Connects M48 Female and T-2 Female Threaded Components
  • M48 Male (External) Thread on One Side
  • T-2 Male (External) Thread on the Other Side
  • Solves Common Thread Incompatibilities in Optical Trains
  • All-Metal Construction for Rigidity
2 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Adapter M48a to T-2a

    The Adapter M48a to T-2a provides a direct, male-to-male connection between the M48 (2-inch filter) thread standard and the smaller T-2 (M42) thread standard. This single component solves a common incompatibility, allowing you to link accessories with female M48 threads, like many coma correctors or field flatteners, directly to equipment with female T-2 threads, such as camera T-rings or off-axis guiders.

    Bridging 2-inch (M48) and T-mount (T-2) Systems

    Many modern optical correctors, such as field flatteners and coma correctors, terminate in a female M48 thread to support a full-frame image circle and prevent vignetting. This adapter allows you to step down from that larger M48 format to the universal T-2 thread used by the vast majority of astronomical cameras, filter wheels, and off-axis guiders, ensuring compatibility across your equipment.

    A Male-to-Male Adapter for Common Imaging Scenarios

    This adapter features external (male) threads on both the M48 and T-2 sides. It is specifically designed to join two components that both have internal (female) threads, a frequent situation when building a rigid, threaded imaging train. For example, you can securely connect the female M48 output of a reducer directly to the female T-2 input of your camera's T-ring assembly.

  • What is the primary use for the Adapter M48a to T-2a?

    Its primary use is to connect an astronomy component that has a female M48 (2-inch) thread to another component that has a female T-2 (M42) thread. It functions as a step-down adapter with male threads on both sides, creating a secure, threaded connection.

    I have a coma corrector with a female M48 thread and a ZWO camera with a female T-2 thread. Is the Adapter M48a to T-2a the right part?

    Yes, this is an ideal application for this adapter. The male M48 thread will screw into your coma corrector, and the male T-2 thread will attach to your camera's T-ring or associated spacers, creating the solid link you need for imaging.

    Does the Adapter M48a to T-2a add significant length to the optical path?

    While any adapter adds some optical length, this component is designed to be as low-profile as possible to minimize its impact on your back focus distance. It is intended as a simple thread converter, not a significant extension tube.

    Can I use the Adapter M48a to T-2a to attach my 2" field flattener to my Canon DSLR T-ring for imaging the Andromeda Galaxy (M31)?

    Yes, this is a primary use case. If your field flattener terminates in a standard female M48 thread and your Canon T-ring has the standard female T-2 thread, this adapter will bridge the two components securely for your imaging session of M31.

    What do "M48a" and "T-2a" mean in the name Adapter M48a to T-2a?

    The "a" in the name refers to the German word "außen," which means "external." This indicates that the adapter has external (male) threads on both its M48 side and its T-2 side.

    Is this adapter threaded for 2-inch filters?

    The M48 side of the adapter uses the same thread pitch as a standard 2-inch filter. However, because it is a male thread, you cannot screw a filter directly into it. It is designed to screw into a component that has female M48 threads, like the body of a field flattener or corrector.

  • Standard Manufacturer's Warranty