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Home / Products / Astronomy Adjuster / M42/M48/M54 Focal Plane Ring Deep Space
M42/M48/M54 Focal Plane Ring Deep Space Photography Adjustment

M42/M48/M54 Focal Plane Ring Deep Space Photography Adjustment

M42, M48, and M54 focal plane adjustment rings are precision components for deep space photography, designed to align the sensor plane with the optical focus in astronomical imaging systems. Each ring features internal and external threads with consistent 10mm and 3.5mm lengths, a minimum thickness of 12mm, and is constructed from durable metal. The series supports standard mounting configurations for telescope and camera integration in astrophotography setups.

  • Precise focal plane alignment for deep space imaging with consistent thread dimensions across M42 / M48 / M54
  • 12mm minimum thickness ensures structural rigidity under long-exposure vibration and thermal stress
  • Lightweight design (65g to 75g) reduces payload on telescope mounts without compromising stability
  • Standardized 10mm internal and 3.5mm external thread lengths allow compatibility with common optical accessories
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Technical features

  • M42 ring: internal thread 10mm length, external thread 3.5mm length, 65g weight, 12mm minimum thickness, 75mm diameter
  • M48 ring: internal thread 10mm length, external thread 3.5mm length, 70g weight, 12mm minimum thickness, 80mm diameter
  • M54 ring: internal thread 10mm length, external thread 3.5mm length, 75g weight, 12mm minimum thickness, 90mm diameter
  • All rings feature a 12mm minimum thickness for mechanical stability under thermal and mechanical stress
  • Thread lengths standardized for compatibility with common optical and camera mounting systems
  • Metal construction provides durability and resistance to deformation during repeated use

Who it is for

  • Astronomy equipment integrators building custom imaging rigs
  • Professional and amateur astrophotographers calibrating sensor alignment
  • Distributors sourcing precision adjustment rings for astronomical accessory kits

Specifications

ModelsM42 / M48 / M54
Internal Thread Length10mm
External Thread Length3.5mm
Minimum Thickness12mm
Diameter75mm (M42) / 80mm (M48) / 90mm (M54)
Weight65g (M42) / 70g (M48) / 75g (M54)

Use guide

  • Select ring size (M42 / M48 / M54) based on the required diameter and mounting compatibility
  • Ensure the internal thread matches the camera or telescope adapter thread specification
  • Use the external thread to connect to the next optical component with matching thread size

FAQ

What is the internal and external thread length?
All models have 10mm internal thread length and 3.5mm external thread length.
What is the minimum thickness of the ring?
12mm for all M42, M48, and M54 models.
Are the rings available in custom sizes?
No. Only M42, M48, and M54 sizes are available with fixed dimensions.
What is the weight of each ring?
M42: 65g, M48: 70g, M54: 75g.
What is the diameter of each ring?
M42: 75mm, M48: 80mm, M54: 90mm.

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