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

Key Benefits

• Increases working distance by 5mm to 30mm without changing the objective or microscope body
• M25 standard thread ensures compatibility with existing M25 objective lenses and microscope bodies
• Lightweight aluminum alloy construction resists deformation under repeated use
• Screw-on design allows quick installation and removal without tools
• Available in 16 extension lengths to match specific bench or inspection needs

Application Scenarios

• Extending the working distance for BGA rework where a soldering iron or hot air pencil must fit under the objective
• Adjusting clearance for inserting or removing a sample from a metallurgical or semiconductor inspection stage
• Enabling access to a specimen during micro-mechanical assembly or repair under a stereo microscope
• Providing space for a probe or micro-gauge during precision measurement tasks
• Allowing room for a sample holder or fixture when inspecting irregularly shaped parts

Who It Is For

• Electronics manufacturers performing SMD and BGA rework and inspection
• Metallurgy and heat-treatment labs inspecting castings, welds or surface treatments
• Semiconductor and optical component inspection lines with tight clearance constraints
• Jewellery and watchmaking workshops handling small parts under magnification
• University and teaching labs requiring flexible setup for student experiments

Problems It Solves

• A fixed working distance limits the ability to insert tools or fixtures under the objective
• Standard objectives cannot be used when a soldering iron, probe or sample holder blocks the path
• No standard adapter exists for extending M25-threaded objectives beyond the original design
• Operators must replace the entire objective or microscope to gain more clearance
• Lack of modular extension options forces a trade-off between magnification and access

Technical Features

• Thread standard: M25 male and female threads
• Male thread length: 4mm for secure connection
• Extension length range: 5mm to 30mm in 1mm increments
• Material: High-quality aluminum alloy
• Screw-on installation, no tools required
• Designed for use with microscope objective lenses requiring M25 thread extension

Specifications

Specifications are taken from the AMADA product data for this item. Confirm critical dimensions with us in writing before ordering.

Customization Options

• Available in 16 standard extension lengths: 5mm to 30mm
• Custom lengths above 30mm available upon request
• Special thread finishes or coatings available on request

Comparison With Other Options

Use Guide

• Ensure the objective lens and microscope tube both have M25 threads before installation
• Align the threads carefully before screwing on to prevent cross-threading
• Tighten by hand only; do not use tools to avoid over-tightening and thread damage
• Check that the objective remains in focus after extension; minor refocusing may be needed
• Use the shortest extension length that provides sufficient clearance to avoid optical distortion