Microscope with Erecting Prism 38mm objective

Photo set 1392

This microscope is very modular. The central component is the drawtube with focusing mechanism. The body of the instrument is fitted with a long 1 inch diameter threaded flange which is supplied with a locking ring. The thread allows the microscope to be attached to various Gaertner instruments, such as the precisions cross slides, instrument bases with cross-support arms, among others. The rack and pinion focusing has a range of 38mm. The nominal optical tube length of the microscope is 160mm.

The basic microscope is supplied with a straight ocular adapter, however these instruments have the optional inclined image erection prism installed instead of the straight tube. The ocular is the standard type M242 Ramsden 10x.

Gaertner objectives are continuously threaded over their entire length (RMS standard thread) and have a locking ring. The continuous thread allows precise adjustment of the magnification ratio of the instrument when using micrometer eyepieces or filar eyepieces. Focal length of the objectives supplied with these instruments is 38mm (Gaertner part number M222).

With the addition of the erecting prism adapter, the normally inverted image produced by the standard Gaertner measuring microscopes is 're-inverted' by use of a special roof prism. The M193 adapter also inclines the ocular at an angle of 60 degrees. The Gaertner catalog number is M193.

The adapter also increases the effective optical tube length of the microscope 26mm. The effect of this increase is to slightly increase the magnification while slightly decreasing the working distance and the field of view. The erecting prism replaces the standard eyepiece tube adapter. These normally have their own spider cross lines installed, however we often get them in with missing cross lines. These are offered at a reduced price. Glass reticles or scales may be installed by the user.

As outfitted, the instrument has the following characteristics:
39x total magnification.
45.7mm working distance
2.82mm diameter object field

These microscopes are in very fine condition cosmetically, and in perfect optical condition. Please note that they do not include the cross line reticle!

Photo set 1666

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