High powerobjective lens

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Low battery will cause gray out menu item. They want to make sure you have a fully charged battery before beginning operation. . ages ago (permalink)

It seems to be mentioned in the manual too (pp 246-247). ages ago (permalink)

An optical fiber, or optical fibre, is a flexible glass or plastic fiber that can transmit light from one end to the other. Such fibers find wide usage in ...

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Hi, mine does the same too.Mirror Lock -up " This option is not available for current setting.." what should i do? ages ago (permalink)

What is objective lensin microscope

Gets or sets the sensitivity of the image sensor. A higher number means higher sensitivity, which also increases image noise. NOTE: The gain has no effect if ...

The option is also grayed out if there is no lens mounted on the camera. Originally posted ages ago. (permalink) heinmcleod edited this topic ages ago.

Typesof objectivelenses

Found my answer here too. THANKS! I had a low battery and that was it. Finally go the fiber out of the way of the sensor that's been troubling me. ages ago (permalink)

I think you mean if there is a lens mounted. Originally posted ages ago. (permalink) cmadir edited this topic ages ago.

High powerobjectivemicroscopefunction

What is the function of objective lensin microscope

Hey there! My name is Lauren & I am a professional photographer based in Denver, CO. I have always been in love with documenting timeless memories and want to ...

Objective lensmagnification

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Hi everyone!!! I am having a little trouble locking the mirror up for cleaning on my d90. Under the set-up menu, I typically choose the "Lock mirror up for cleaning" which requires the shutter release to be pressed to do so. Done this may times with no issue. Now today the "Lock mirror up for cleaning" option is grayed out and cannot be selected. If I do try to select it I get an error that says the option is not available with the current settings. I shoot in A priority which is what I have always done and I have not purposly changed anything. Does anyone have any idea what may be causing this? Thanks d90 friends!! 6:30PM, 21 October 2009 PST (permalink)

Function ofcondenser in microscope

The easiest and best way to test the flatness of a flat lapped or polished surface is with an optical flat. Such surfaces are found on micrometers ...

Fig. The objective lens consists of a polepiece to determine the magnetic-field of the lens, a yoke to create a magnetic path, and a copper wire coil. The coil is wound in the yoke around the circumference of the optical axis. A magnetic field is generated by the electric current passing through the coil and a magnetic flux is generated in the yoke. Then, a leakage magnetic field is created in vacuum from the polepiece attached to the end of the yoke. The polepiece of the lens is made of a magnetic component and has a gap to create a leakage magnetic field. As is seen in Figure, the polepiece is cylindrically symmetric and an electron beam passes through the center of the polepiece. The leakage magnetic field (B) has a curvature (shown in Figure) and acts as a lens to converge the electron beam. The strength of the lens can be varied by changing the electric current of the coil. A specimen usually set on a side-entry type holder is placed in the magnetic field (lens) produced by the polepiece. The polepiece determines the performance of the lens, that is, the strength and shape of the magnetic field of the lens. Thus, the polepiece is made of a high-quality magnetic material than that of the yoke and is processed by high precision machining. The objective lens is requested to possess a stronger magnetic field than the intermediate lens, etc., because the focal length of the objective lens is shorter than the other lens. To meet this requirement, the objective lens is made of a magnetic material with a large saturation magnetization. The objective lens used for high spatial-resolution observation requires a further-stronger magnetic field to decrease the aberration of the lens. For this purpose, a polepiece with a narrow gap (a short distance between the upper and lower poles) is used. On the other hand, the objective lens used for element analysis uses a polepiece with a little wider gap at a little sacrifice of image resolution because a more space is needed for an EDS detector to place close to the specimen for increasing the detection efficiency or to ensure a large tilt angle of the specimen.

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The "objective lens" is the first-stage lens to form an image using electrons exiting from the specimen. The objective lens is the most important lens in the imaging lens system because the performance of this lens determines the image quality (resolution, contrast, etc). A good objective lens has both a small spherical aberration (Cs) coefficient and a small chromatic aberration (Cc) coefficient. To decrease these coefficients, shortening the distance between the two magnetic poles and decreasing the bore diameter of the polepiece are required. Since the side-entry-type specimen holder is inserted between the two magnetic poles, there is a limitation on shortening the distance. For the top-entry-type specimen holder, an asymmetric polepiece whose upper bore diameter is larger than that of the lower one is used.

An eyepiece is a component of a microscope that magnifies the primary image produced by the objective, allowing the eye to view the specimen with increased ...

Function ofstage in microscope

Nice to find the answer to my question here, thank you guys!! ages ago (permalink)

As suggested, this option automatically is disabled if you battery is not fully charged. If the battery dies, the mirror comes down. Not a good thing if you are in the middle of wet cleaning your sensor as it will cause damage. Which is why it is disabled unless you have full power. ages ago (permalink)

MOTP-ISO: ISO 10110-7; MOTP-MILB: MIL-PRF-13830B for Digs Numbered 5 to 50 and ANSI/OEOSC OP1.002 for All Digs and Scratches ... These Scratch-Dig Panels are a ...

May 15, 2016 — The 50 Millimeter Lens Is The Only One You Need. The canvas is set, and it's our job to make a picture appear within it.

Specifications: Material: Zinc Selenide (ZnSe) Laser Grade. Parallelism: < 3 minutes of ARC. Surface Quality: < 40/20 scratch–dig Laser Finish.