Resolving power or resolution: the ability to distinguish objects that are close together.  The better the resolving power of the microscope, the closer together two objects can be and still be seen as separate.

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I am using an 8x10 view camera with a 210mm lens. The formula for hypperfocal distance H =f^2/Nc, assuming N=22 and c=0.01, predicts a hyperfocal distance of 66 ...

Examples of magnifying glass · Self-concept change and self-presentation : the looking glass self is also a magnifying glass. · Seeds were observed daily in dim ...

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Shallow depth of field is achieved by shooting photographs with a low f-number to let in more light. Learn more about shallow depth of field today.

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Collimated Light. A ray bundle, or beam of light, in which every ray is parallel to every other ray of light, which effectively originates from an infinitely ...

Apr 2, 2020 — A typical laser device (Figure 1) consists of gain medium, a pumping source to input energy into the device, and an optical resonator or ...

Use our optical calculator to calculate Diffraction limited spot size of the laser according to Wavelength, Beam diameter, EFL and Beam quality (m^2)

A spigot mount supporting TTL metering at maximum aperture and featured a predecessor of the automatic exposure (AE) mechanism.

Objective magnificationin microscope

Immersion Oil:  Clear, finely detailed images are achieved by contrasting the specimen with their medium.  Changing the refractive index of the specimens from their medium attains this contrast.  The refractive index is a measure of the relative velocity at which light passes through a material.  When light rays pass through the two materials (specimen and medium) that have different refractive indices, the rays change direction from a straight path by bending (refracting) at the boundary between the specimen and the medium.  Thus, this increases the image’s contrast between the specimen and the medium.

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One way to change the refractive index is by staining the specimen.  Another is to use immersion oil.  While we want light to refract differently between the specimen and the medium, we do not want to lose any light rays, as this would decrease the resolution of the image.  By placing immersion oil between the glass slide and the oil immersion lens (100X), the light rays at the highest magnification can be retained.  Immersion oil has the same refractive index as glass so the oil becomes part of the optics of the microscope.  Without the oil the light rays are refracted as they enter the air between the slide and the lens and the objective lens would have to be increased in diameter in order to capture them.  Using oil has the same effect as increasing the objective diameter therefore improving the resolving power of the lens.

The lens mount is an interface that allows a lens to be attached to an interchangeable lens camera. As of 2018, Canon has produced 8 mainstream lens mounts.However, a lens mount does not exist simply as a means of attaching a lens to the camera. It also facilitates communication between the camera and the lens, enabling both to perform a wide range of functions.Canon’s first mount was a standard-thread-type screw mount that supported the mechanisms found in rangefinder cameras. Subsequent mounts evolved with the times in order to meet users’ expectations, delivering such advancements as automatic aperture, auto-exposure and autofocus mechanisms.The newest mount, the RF mount, promises even better image quality and usability thanks to its large mount diameter, short back focus distance and enhanced lens-camera communication system. It is indeed a mount designed for the future.It can be said that the lens mount is the key to the future evolution of both lenses and cameras.

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Parfocal: the objective lenses are mounted on the microscope so that they can be interchanged without having to appreciably vary the focus.

RBC: Some trichrome methods incorporate a step for erythrocytes. The commonest colors to use are orange and yellow. Often the dyes are dissolved in ethanol, and ...

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Total magnification: In a compound microscope the total magnification is the product of the objective and ocular lenses (see figure below).  The magnification of the ocular lenses on your scope is 10X.

In 2018, Canon unveiled the new RF lens mount. There were a number of different types of lens mount that came before it. What features did these lens mounts have, and how have Canon mounts evolved throughout the years? Watch this video to find out.

Our lens tubes allow the combining of several optical components into stable and rigid optical assemblies and systems.