Microscope Objective Adapters


These adapters are compatible with most major brands of infinity-corrected microscope objectives.


The standard PSM ships with a Nikon objective (shown here as NIK C60) and an adapter with M25 x 0.75 threads. The MIT adapter is for Mitutoyo objective with M26 x 36 threads/inch (TPI), and the RMS is for many older objectives with Royal Microscope Society threads, 0.800” x 36 TPI. The C mount adapter mates with Edmund Optics objectives and lens tubes with 1.000” c 32 TPI, and the THOR adapter mates with Thorlabs SM1 threads (1.035” x 40 TPI) in their lens tubes.

These last 2 adapters are useful for adding other optics in front of the PSM or using a simple doublet to get a longer working distance objective. The PSM has a 100 mm efl tube lens so a 100 mm efl doublet will give 1:1 magnification. The standard Nikon 10x objective gives 5x magnification with the PSM.

The adapters are held in the PSM by 4 set screws, two on either side of the PSM body. A 2.5 mm hex wrench is used to loosen the M3 set screws.

Disclaimer: All specifications and prices are subject to change.

Worldwide Representatives


Armstrong Optical
+44(0) 1604 654220

All Asian Countries

清 原 耕 輔   Kosuke Kiyohara
清原光学 営業部   Kiyohara Optics / Sales

Kiyohara Optics Inc.
3-28-10 Funado Itabashi-Ku Tokyo, Japan 174-0041

Australia & New Zealand

Mersenne Optical Consulting

Optical Perspectives Group, LLC

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