Nanjing AMADA Instrument Co., Ltd. · Nanjing, China [email protected] · +86-15195807515
AMADA Microscopes Request A Quote
Home Products Biological MicroscopeZoom Stereo MicroscopeFluorescence MicroscopeMetallurgical MicroscopePolarizing MicroscopeVideo Digital MicroscopeMicroscope CameraAstronomy AccessoryMicroscope AccessoryMagnifier Knowledge About Contact Request A Quote
Home / Products / Microscope Adapter / ​5-30mm M25 to M25 Microscope Objective
​5-30mm M25 to M25 Microscope Objective Lens Extender Ring

​5-30mm M25 to M25 Microscope Objective Lens Extender Ring

The 5–30mm M25 to M25 Microscope Objective Lens Extender Ring is a precision adapter for extending the working distance of microscope objective lenses with M25 threads. Made from durable aluminum alloy, it provides stable, vibration-free connections and supports multiple extension lengths from 5mm to 30mm in 1mm increments. Designed for use with biological, stereo, and metallurgical microscopes requiring adjustable objective spacing.

  • Extends working distance without altering optical performance or focus
  • Available in 16 extension lengths (5mm to 30mm) for precise fit to application needs
  • Secure M25 male and female thread connection with 4mm thread engagement for stability
  • Lightweight aluminum alloy construction resists deformation under repeated use
  • Simple screw-on installation compatible with standard M25 objective lens systems
Request A Quote +86-15195807515

Technical features

  • Thread standard: M25 male and female (4 mm thread length)
  • Available extension lengths: 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm
  • Full length options: 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm
  • Material: High-quality aluminum alloy, lightweight and resistant to deformation
  • Screw-on design with secure thread engagement for stable mounting
  • Compatible with microscopes using M25 threaded objective lenses

Who it is for

  • Microscope users in clinical labs needing extended clearance for specimen handling
  • Electronics inspection technicians working with high-profile components or solder joints
  • Research labs requiring flexible objective positioning for specialized sample holders
  • Distributors offering modular microscope accessories for custom configurations

Specifications

Thread TypeM25 male and female
Thread Length4 mm
Full Length Options9mm to 34mm (in 2mm steps)
MaterialAluminum alloy
Connection TypeScrew-on
CompatibilityM25 threaded objective lenses

Use guide

  • Determine required working distance extension and select matching length
  • Ensure the objective lens and microscope both use M25 threads
  • Screw the extender onto the objective lens until fully seated and secure
  • Verify alignment and focus after installation; adjust if needed

FAQ

What extension lengths are available?
Available in 5mm to 30mm increments (1mm steps) and full lengths from 9mm to 34mm (2mm steps).
Is this compatible with all M25 objective lenses?
Yes, as long as the objective lens uses standard M25 male or female threads with 4mm engagement length.
Can I use this with halogen or LED illumination microscopes?
Yes, the extender does not affect illumination systems and is compatible with all standard microscope types.
How do I install it?
Simply screw the extender onto the objective lens until fully engaged. No tools required.
Do you offer custom lengths beyond 30mm?
Yes, contact sales for 28mm and 30mm options or custom lengths outside the standard range.

Related products