This is the standard stage as supplied with the Leitz inverted microscope Diavert (or it’s metallurgical equivalent, the Epivert). Because the objectives are located beneath the stage in an inverted configuration, there is no provision for a condenser carrier under the stage or on the stage attachment bracket.

The dovetail is identical to that found on the Ortholux 2 and the Orthoplan, but this stage would only be suited for examinations with incident light on those instruments because of the lack of a condenser carrier.

The stage is roughly square ( 160 mm by 163mm), and has a removable center annulus 70mm in diameter. The clear aperture of the insert is 30mm. The stage is tapped on three edges for addition of the attachable mechanical stage (not included).

The stage is in fine condition.

***MPN
***OEM Leitz
***SKU*** 23094

***MPN RL092002
***OEM Optem
***SKU*** 26500

This assembly was manufactured by Optical Specialties as a part of one of their measurement systems. It appears to be an image rotation system consisting of two separate motions. The upper portion of the mount revolves through an angle of about 90 degrees and is manually adjusted and clamped via a large knurled knob.

The lower portion of the system is electronically actuated (we have the cable but not the electronics) and appears to rotate a dove prism type assembly through an angle of 45 degrees which results in an image translation of 90 degrees. Rotation is not continuous, rather there are a pair of retro-reflector systems located in the periphery of the housing.

Seemingly, the user would adjust the camera or detector to one axis of a geometry using the manual setting, and then be able to switch rapidly between that position and a second position oriented 90 degrees away. Looking at the base of the system (third photo), the central portion within the chrome bearing is that part that rotates. The top mounting remains stationary.

This system was installed on the modified Nikon trinocular tube we have listed elsewhere. The upper portion has three set screws for securing the detector – it is not threaded.

Photo set 1626
***MPN
***OEM Optical Specialties Inc
***SKU*** 23048

This is a single Leitz Periplan GF 10x eyepiece with a focusable eyelens. It is for use in the standard DIN size ocular tube (23.2mm diameter). The diaphragm is located 18mm beneath the end of the flange so it is suitable only for the earlier Leitz instruments with a 170mm mechanical tubelength (Orthoplan / Ortholux 2 era and earlier). It may be used in the later and current stands if an 8mm adapter collar is installed (not included).

The Periplan designation means that the optics have a more highly corrected eyelens. The GF denotes Gross Field, but with a field-of-view index of 18mm it is not as large as the GW series which have a 30mm diameter ocular sleeve. This eyepiece has a focusable eyelens and comes with a threaded reticle retainer ring (reticle diameter is 17.5mm). No reticle is included.

This may be paired either with another focusable ocular, or with a fixed eyelens ocular. It should be noted that Leitz made at least three different height GF 10x oculars (the height of the upper bezel to the sleeve flange). The earliest GF oculars were only about 3mm proud of the ocular tube. The next series were 9mm tall. This ocular (when set to the nominal focus plane indicated by a radial groove) is about 14.5mm tall, which means it is one of the last in the series. When selecting a second Periplan GF 10x eyepiece, make sure to determine that the height is similar – although the magnifications and the field of view of all the oculars are identical, it is very disconcerting to have one eyepiece further away than the other!

The lens is in near mint condition, and the optics are completely free of blemishes.

Photo set 1611
***MPN
***OEM Leitz
***SKU*** 23033

This is a GW 6.3x ocular for use in the ‘super-wide-field’ viewing tubes as found in the Leitz Orthoplan and MM-5 and 6 research microscopes. It is the original ‘chimney’ style with the tapered chrome barrels. The ocular was removed from the large projection screen built into an MM-5 research metallograph. As a consequence of its location, it was never touched – the glass is perfect as are the cosmetics. The Locktite that had been used to secure the eye lens in the proper position for screen focus has been removed and new Leitz lubricant applied to the helical threads. For all practical purposes, the lens is in ‘unused’ condition. Focus motion works perfectly.

The ocular has a barrel diameter of 30mm and a field-of-view index of 28mm (this is the diameter of the observed object field when using a 1x objective).

Photo set 1607
***MPN
***OEM Leitz
***SKU*** 23029

This is a rare pair of high-eyepoint focusing GW 8x oculars intended for use in the ultra-wide-field instruments of 170mm mechanical tube length. These include the Leitz Orthoplan (Metalloplan), the MM-5 and MM-6 inverted metallographs, and some other specialized instruments that utilize the 30mm diameter viewing tubes.

These lenses have a field-of-view index of 28mm (the diameter of the observable object field that would seen when using a 1x objective lens). They both include threaded retaining rings for 24mm diameter reticles.

These lenses are in near-perfect condition. The only blemish I could find was a bright spot on one of the focusing knurls. The glass appears to be perfect in all respects. Neither ocular includes the threaded rubber eye guard. This pair sold for $1850 in 1990.

***MPN 519 442 (x2)
***OEM Leitz
***SKU*** 23025

This 10x Nikon ocular is intended for use in the simpler stereo microscopes. It has a barrel diameter of 30mm. It does not include an eye guard. The ocular is in good cosmetic condition – there is an ‘8’ scribed into the side of the barrel, and the nomenclature shows a bit of wear although still readable. The glass appears to be perfect. Field-of-view index is 20mm – this is the diameter of the object field that is observable when the objective magnification is set to 1x.

The upper eyelens is fixed. This ocular does not include the adapter ring to install reticles. This listing is for a single eyepiece.

Photo set 1599
***MPN
***OEM Nikon
***SKU*** 23021

This 15x Nikon ocular is intended for use in the simpler stereo microscopes. It has a barrel diameter of 30mm. It does not include an eye guard. The ocular is in superb condition – even the printed nomenclature on the front bezel is strong. The glass appears to be perfect. Field-of-view index is 14mm – this is the diameter of the object field that is observable when the objective magnification is set to 1x.

The upper eyelens is fixed – these oculars do not accept reticles. This listing is for a single eyepiece.

Photo set 1598
***MPN
***OEM Nikon
***SKU*** 23020