This listing comprises an excellent Nikon CFW 15x wide field ocular. The eyepiece has a focusable eyelens. The built-in rubber eye guard is missing. The ocular is 23.2mm in diameter and is intended for use in compound microscopes such as the Optiphot.

The CF designation denotes �chrome free�, meaning that the color corrections within the ocular are independent of those of the objective. Many manufacturers balance the color corrections between the objectives and the oculars – using an objective from one manufacturer and an ocular from another is likely to result in over-correction of some aberrations, and under-correction of others. One of the reasons Nikon prefers to completely correct both oculars and objectives is that it eliminates the color fringe that is often seen about the periphery of the field of view diaphragm.

The glass appears to be free of all blemishes. The barrel shows very light signs of use. Unlike most of the Nikon CFW oculars I have seen, this one has white nomenclature instead of yellow, and the radial groove that indicates the point of nominal focus is left unfilled with pigment. Most likely it is an early iteration of the optic.

Photo set 1596
***MPN 79043
***OEM Nikon
***SKU*** 23018

This is a very nice Nikon 18x ocular with fixed eyelens. It is equipped with an extendable eyeguard. This eyepiece is both widefield and high eyepoint. It is engraved H.K.W. 8x, and to one side ‘Bi’. The Bi means the diaphragm is critically set and sized so it can be easily mated with other similar oculars with the ‘Bi’ engraving

The condition is near mint – coatings are without flaws, and the barrel shows almost no signs of use. Unfortunately, we do not have a second ocular to form a pair.

This eyepiece probably dates from the 1970’s. It is suitable for use with the older ‘S’ stands (the black ones) as well as the Optiphots when equipped with the less expensive objectives. Later production instruments would have been outfitted with the more recent CF chrome-free objectives and oculars.

Photo set 1590
***MPN
***OEM Nikon
***SKU*** 23012

This microscope objective is corrected for looking at uncovered samples such as semiconductor wafers or metallurgical polished sections. It is capable of work with incident light darkfield, therefore the central objective is surrounded by an annular condenser / mirror system to direct light onto the sample. Because of the condenser system the 26mm / 0.75tpi thread size is larger than the standard RMS thread (20.3mm).

The objective is of the ‘finite’ series as opposed to infinity systems. It is corrected for a tubelength of 210mm. The 210 / 0 on the side of the barrel indicates both the tubelength and the coverglass correction – ‘0’ means strict adherence to uncovered samples is required.

Characteristics of the objective include:

� Magnification – 20x (green color band)
� Numerical Aperture – 0.40
� Working Distance – 2.5mm
� Correction Distance – 45mm
� Tube length correction – 210mm
� Thread size – 26mm (BD thread)
� Flat field correction (Plan)

In addition to being excellent microscope objectives, this series of objectives is strongly favored for macro photography using image-stacking software. These are CF objectives, by which Nikon means ‘Chrome-Free’ – unlike most manufacturers who split the corrections for color aberrations between the objective and the ocular, the Nikon objectives and oculars are completely corrected independently of each other. This makes them especially suitable for stand-alone operation as macro lenses, although they will perform best when the image sensor is located reasonably close to the intended intermediate image plane. The chrome shroud of the BD series may also be completely removed leaving a very matte-black and relatively thin central objective – sometimes very advantageous in macro photography.

This objective is in near-perfect condition – the glass appears to be completely blemish-free.

Photo set 1546

BMI Surplus, Inc. is your best resource for new, pre-owned,
recycled & refurbished microscopes and microscope components.
We will work with you individually to find the perfect
microscope for your application.

Buy online or give us a call with any questions at 781-871-8868.
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**Shipping & Freight fees are dependent on your location. We
will provide a freight quote to meet your individual needs and
work with you if you prefer to use your own carrier. We have 30
years of shipping sensitive scientific instruments & industrial
equipment. We ship with the utmost care!
***MPN
***OEM Nikon
***SKU*** 21568

This listing is for an Olympus metallurgical (or semi-conductor) microscope objective. The objective is in flawless condition. I could detect no blemishes either in the optical system or on the objective housing.

The objective is of recent vintage (mid-1990’s), and is corrected for use with infinity tube-length vertical illuminators. Important attributes of the objective can be summarized as follows:

� 20x magnification
� 0.46 numerical aperture
� Corrected for infinity relay lenses with a back focal length of 180mm
� Insensitive to cover glass
� S Plan designation indicates fully flat field including 26.5mm oculars
� 3.10mm free working distance
� 45mm adjustment length (distance from specimen plane to objective thread seat)
� Standard RMS thread (0.80 inches)
� NOT suited for dark field
� IC designation indicates suitability for Nomarski Interference Contrast or polarized light applications

The objective is suitable for use with the infinity vertical illuminator as found on the later BHM series instruments, as wsell as the Vanox II and III, the PME 3 and PMG 3 inverted metallographs, and the STM measuring microscopes. I am unsure about suitability to the more recent and current instruments. Olympus catalog number is 1-LM540T.

Photo set 1506

BMI Surplus, Inc. is your best resource for new, pre-owned,
recycled & refurbished microscopes and microscope components.
We will work with you individually to find the perfect
microscope for your application.

Buy online or give us a call with any questions at 781-871-8868.
We’re here ready to help you!
**Shipping & Freight fees are dependent on your location. We
will provide a freight quote to meet your individual needs and
work with you if you prefer to use your own carrier. We have 30
years of shipping sensitive scientific instruments & industrial
equipment. We ship with the utmost care!

***MPN 1-LM540T
***OEM Olympus
***SKU*** 21533

This listing is for an Olympus metallurgical (or semi-conductor) microscope objective. The objective housing is in very fine condition (a couple of small dings in the front lens bezel. The front lens does have some very minor defects – there are a couple of miniscule chips at the very edge of the lens, and near these chips are some tiny scratches, also very near the margin of the lens. Please see the photos for details.

The objective is of recent vintage (mid-1990’s), and is corrected for use with infinity tube-length vertical illuminators. Important attributes of the objective can be summarized as follows:

� 10x magnification
� 0.30 numerical aperture
� Corrected for infinity relay lenses with a back focal length of 180mm
� Insensitive to cover glass
� S Plan designation indicates fully flat field including 26.5mm oculars
� 10.20 free working distance
� 45mm adjustment length (distance from specimen plane to objective thread seat)
� Standard RMS thread (0.80 inches)
� NOT suited for dark field
� IC designation indicates suitability for Nomarski Interference Contrast or polarized light applications

The objective is suitable for use with the infinity vertical illuminator as found on the later BHM series instruments, as wsell as the Vanox II and III, the PME 3 and PMG 3 inverted metallographs, and the STM measuring microscopes. I am unsure about suitability to the more recent and current instruments. Olympus catalog number is 1-LM530T.

Photo set 1504
***MPN 1-LM530T
***OEM Olympus
***SKU*** 21531

The ‘M’-series of Newport objectives are essentially conventional microscope objectives that have been requantified in terms of their performance as imaging elements in spatial filters. They are high-quality achromats of short adjustment length (37mm), with standard RMS mounting threads. They are anti-reflection coated for the visible region of the spectrum, and corrected for an optimal 160mm rear conjugate.

� Magnification – 20x
� Numerical Aperture – 0.40
� Wavelength range – 400 to 700nm
� Working distance – 1.7mm
� Input Beam Diameter – 5.0mm
� Optimal Pinhole Diameter – 15 um

The objective is in excellent condition without any optical flaws. They may be used as conventional microscope objectives in 160mm tube length instruments.

Photo set 1482
***MPN M-20x
***OEM Newport Research Corp (NRC)
***SKU*** 21511

The ‘M’-series of Newport objectives are essentially conventional microscope objectives that have been requantified in terms of their performance as imaging elements in spatial filters. They are high-quality achromats of short adjustment length (37mm), with standard RMS mounting threads. They are anti-reflection coated for the visible region of the spectrum, and corrected for an optimal 160mm rear conjugate.

� Magnification – 10x
� Numerical Aperture – 0.25
� Wavelength range – 400 to 700nm
� Working distance – 5.5mm
� Input Beam Diameter – 5.5mm
� Optimal Pinhole Diameter – 25 um

The objective is in excellent condition without any optical flaws. They may be used as conventional microscope objectives in 160mm tube length instruments.

Photo set 1481
***MPN M-10x
***OEM Newport Research Corp (NRC)
***SKU*** 21510

This is a conventional meidum magnification dry achromat microscope objective. It is not marked as to cover-glass correction, nor as anything specified on the Rolyn Optics web site. However, the numerical aperture is low enough that the presence or absence of a cover slip is inconsequential.

� Magnification – 10
� Numerical Aperture – 0.30
� Objective thread – standard RMS (0.8 inch)
� Tube length – 160mm
� Adjustment length – 37mm
� Working distance – 5.5mm
� Manufacturer – Rolyn Optics
� Catalog number – 80-3055

The objective is in superb cosmetic condition. Optical condition is perfect. Most of these lenses have a yellow band to denote magnification, however a couple of the lenses have a purple band instead. Otherwise the lenses appear to be absolutely identical.

Photo set 1480
***MPN 80-3055
***OEM Rolyn Optics Co
***SKU*** 21509

This is a conventional low magnification achromat microscope objective. It is useful for scanning larger areas of samples, and features a relatively long working distance. One unusual feature of this objective is the removable protective cover glass in a chrome threaded cell. An additional 2mm or so of working distance can be achieved when this cover has been unthreaded. Other lens characteristics remain essentially unchanged.

� Magnification – 5
� Numerical Aperture – 0.12
� Objective thread – standard RMS (0.8 inch)
� Tube length – 160mm
� Adjustment length – 37mm
� Working distance (cap installed) – 23.4mm
� Manufactured in Germany by Rolyn Optics
� Catalog number – 80-3045

The objective is in near-new condition and comes in a protective capsule. Optical condition is perfect.

Photo set 1477
***MPN 80-3045
***OEM Rolyn Optics Co
***SKU*** 21506

This is a conventional low magnification achromat microscope objective. It is useful for scanning larger areas of samples, and features a relatively long working distance. One unusual feature of this objective is the removable protective cover glass in a chrome threaded cell. An additional 2mm or so of working distance can be achieved when this cover has been unthreaded. Other lens characteristics remain essentially unchanged.

� Magnification 3.5
� Numerical Aperture – 0.10
� Objective thread – standard RMS (0.8 inch)
� Tube length – 160mm
� Adjustment length – 37mm
� Working distance (cap installed) – 19mm
� Manufactured in Germany by Rolyn Optics
� Catalog number – 80-3035

The objective is in near-new condition and comes in a protective capsule. Optical condition is perfect.

Photo set 1476
***MPN 80-3035
***OEM Rolyn Optics Co
***SKU*** 21505

This is the highest magnification ocular available for the Gaertner modular measuring microscope line. Gaertner oculars are smaller in diameter than normal microscope eyepieces (49/64ths as opposed to 23.2mm). The part number is M239, and it has the following characteristics.

� Magnification – 20x
� Equivalent focal length – 12mm
� Field diameter – 10mm
� Must be used with eyepiece adapter M250-239

The eyepiece is in excellent condition and perfect optical condition.

Photo set 1398
***MPN M239
***OEM Gaertner Scientific
***SKU*** 21427