Will The 37mm Series 1 Vivatar Len Cover Fit My Olympus Micro 4/3 Camera?

You may be thinking, "What a boring subject for an article," and you would exist right. However, equally boring equally the interface between your camera and lens might be, the significance of your camera's specific mountain, along with which lenses tin be used on your photographic camera, which lenses can be adjusted to your camera, and why some lenses work and others practice non, can prove to be a more interesting subject field that may fifty-fifty inform which photographic camera or lens arrangement you eventually buy.

What Does a Lens Mount Exercise?

A lens mount is a standard or proprietary interface used by photographic camera and lens manufacturers to ensure a secure and authentic means for attaching a lens to a camera body. Each camera system nowadays uses its own unique mount that limits compatibility between lenses and other manufacturers' cameras, and besides enables electronic communication betwixt the lens and camera to achieve accurate focus and exposure.

*Left to right:* Canon EF, Nikon F, and Sony E bayonet-style lens mounts

Most lens mounts in electric current use are bayonet style, in which a lens is attached to the camera body by registering the lens in proper orientation with the camera body, then giving a slight twist of near 45-90° to lock the lens in identify. Prior to the bayonet mount, a couple of other mounting styles were normally used, namely thread and breech-lock mounts. Thread mounts, or screw mounts, are self-referential and depict the action of threading your lens onto the camera body, much in the aforementioned style you thread a nut onto a bolt. Breech-lock mounts are more than closely related to bayonet mounts; withal, they use a self-contained rotating ring on the lens itself to tighten the lens onto the camera body with friction.

Bayonet mounts are the most favored of these 3 mounting types, due to the ease and speed of installing and removing lenses from camera bodies, the ability to comprise electronic contacts using this attachment method, and the repeatable precision afforded past a simpler design.

*Left to right:* Breech-lock mount on a Mamiya RB lens and an M39 screw mount on a Leica lens

What's in a Lens Mount?

Besides connecting a lens to a camera and sporting a certain design style, lens mounts also have a number of distinctions from manufacturer to manufacturer. Size is the main differentiator between the various mounts, and is a slightly more than circuitous measurement than y'all may imagine. The number of tabs in a specific bayonet tin vary from one manufacturer to another (although nigh use three tabs), the direction in which you rotate the lens to connect with the photographic camera body varies amid brands, and the incorporation of electronic contacts will also exist unique to the camera and lens manufacturer. Furthermore, each mountain corresponds, arguably, to the nearly important element of this article, a specific flange focal distance (FFD). This measurement, which describes the length from the mounting flange (the border of the lens mount on the camera trunk) to the image sensor or film plane, varies from manufacturer to manufacturer, and is i of the true limiters of the interchangeability of lenses with specific cameras.

*Left to correct:* Canon FD breech-lock mountain and a Mamiya 7 bayonet mount

The flange focal altitude of each camera arrangement is factored into subsequent lens designs, and is a abiding length used by each manufacturer to ensure accurate focus from a specific lens'southward minimum focusing altitude to infinity. Using a lens with a specific FFD on a camera system with a shorter flange altitude, you will not exist able to achieve infinity focus. This distinction is the key element in which lenses can be used on camera systems other than the original i the lens was designed for, via a lens adapter.

Current Lens Mounts			Popular Historic Lens Mounts
Lens Mount	Flange Focal Altitude	Mount Type	Lens Mountain	Flange Focal Distance	Mount Blazon
Nikon Z	16.0mm	Bayonet	Pentax Q	ix.2mm	Bayonet
Nikon i	17.0mm	Bayonet	Samsung NX	25.5mm	Bayonet
FUJIFILM X	17.7mm	Bayonet	M39 (26tpi)	28.8mm	Spiral
Canon EF-M	18.0mm	Bayonet	Contax M	29.0mm	Bayonet
Sony E	xviii.0mm	Bayonet	Nikon S	34.85mm	Bayonet
Hasselblad X	18.14mm	Bayonet	Four Thirds	38.67mm	Bayonet
Micro 4 Thirds	xix.25mm	Bayonet	Canon FD	42.0mm	Bayonet or breech-lock
Leica Fifty	xx.0mm	Bayonet	Minolta SR	43.5mm	Bayonet
Catechism RF	xx.0mm	Bayonet	Exakta	44.7mm	Bayonet
FUJIFILM G	26.7mm	Bayonet	M42 (x1)	45.46mm	Screw
Leica Yard	27.8mm	Bayonet	Contax C/Y	45.5mm	Bayonet
Canon EF	44.0mm	Bayonet	DKL	45.7mm	Bayonet
Sigma SA	44.0mm	Bayonet	Olympus OM	46.0mm	Bayonet
Minolta/Sony A	44.5mm	Bayonet	Leica R	64.0mm	Bayonet
Pentax K	45.46mm	Bayonet	Contax 645	64.0mm	Bayonet
Nikon F	46.5mm	Bayonet	Bronica ETRS	69.0mm	Bayonet
Leica Due south	l.0mm	Bayonet	Pentacon Six/Exakta 66	74.1mm	Breech-lock
ARRI PL	52.0mm	Breech-lock (cine)	Hasselblad V	74.9mm	Bayonet
T Mount	55.0mm	Screw (M42 x 0.75)	Pentax vi x 7	84.95mm	Bayonet
Hasselblad H	61.63mm	Bayonet	Bronica SQ	85.0mm	Bayonet
Mamiya 645	63.3mm	Bayonet	Mamiya RZ67	108.0mm	Bayonet
Pentax 645	70.87mm	Bayonet	Mamiya RB67	111.0mm	Bayonet or breech-lock

Lens Adapters

Spurred by the somewhat recent appearance of mirrorless photographic camera systems, a renewed interest in the power to utilise a wide assortment of third-political party lenses has also occurred. Due to the cocky-referential design of these cameras, the lack of having a mirror in a camera body design affords, also a more compact overall design, a shorter FFD. By having this shorter registration distance, y'all can theoretically mount whatsoever lens with a longer FFD on a camera with shorter FFD through the use of a lens adapter.

The lens adapter finer serves to make upwardly the difference in focal flange distance between the camera and lens—for example, a Nikon F lens to Sony E adapter makes upwards the deviation of 28.5mm to provide the proper total 46.5mm of focal flange distance for a Nikon F-mountain lens to achieve infinity focus. While this is the ideal situation, to mountain lenses with a longer FFD on cameras with a shorter FFD, adapters practise exist that allow you to physically adhere lenses with shorter FFD measurements to camera bodies with a longer FFD. The caveat with these adapters is that yous will not exist able to achieve infinity focus without the inclusion of a cosmetic chemical element in the adapter itself, and it is unlikely the quality of this corrective element will match the quality of the lens beingness mounted. However, without the corrective lens in place, this combination will afford the ability to work at focusing distances less than infinity, since the lens adapter is at present performance as an extension tube.

*Acme left to bottom right:* Metabones Speed Booster for Canon EF to Sony E, Metabones Nikon F to Sony East adapter, Fotodiox Nikon F to Catechism EF adapter with Dandelion Focus Scrap, and Fotodiox M39 to Leica M adapter

With this bones concept in mind, lens adapters can also be essentially more sophisticated and maintain electronic advice betwixt the adapted lens and trunk through the use of dandelion chips, with some adapters even capable of retaining a lens's autofocus and prototype-stabilization capabilities. On the other hand, completely manual adapters will non convey whatsoever information between the photographic camera and adapted lens, forcing y'all to manually focus and adjust the aperture settings on a lens, and piece of work in manual or discontinuity-priority fashion on the camera.

One additional blazon of adapter that has gained tremendous attention over the past few years is a style designed exclusively for APS-C and smaller format mirrorless cameras, virtually commonly Sony E, Fujifilm X, and Micro Four Thirds systems, that has been popularized by Metabones and Mitakon Zhongyi. With the exception of Sony Eastward-mount at present beingness featured on full-frame cameras, these mounts typically represent to crop-sensor sizes and, equally such, are associated with terms like "ingather cistron" and "equivalent focal length." This batch of lens adapters strives to make these terms somewhat moot past incorporating a condensing lens into their design to minimize, or in some cases eliminate, the crop factor and increase the corporeality of light reaching the sensor. This is accomplished by projecting all of the light gathered by the lens onto the epitome sensor, rather than simply simply losing the light that would typically be cropped out by the smaller sensor dimensions.

Source: https://www.bhphotovideo.com/explora/photography/tips-and-solutions/introduction-lens-mounts-and-lens-adapters

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