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Micaya


Skráður þann: 17 Des 2009
Innlegg: 4998


InnleggInnlegg: 16 Apr 2011 - 0:25:57    Efni innleggs: Linsur - merking skammstafanna Svara með tilvísun

Manufacturer's Acronyms

Canon

DO: Diffractive Optics.

EF: Electro-Focus. Refers to the focus motor built into the lens that is common to all EOS-mount lenses.

EF-S: Electro-Focus Short Back Focus. Canon's new lines of lenses made specifically for small-sensor EOS digital cameras.

EOS: Electro-Optical System. Refers to Canon's series of SLR cameras that are capable of auto-focusing.

IS: Image Stabilizer

L: Luxury. Designation for Canon high-end lenses.

USM: Ultrasonic Motor. In-lens focusing motor that is super quiet and is based on electro-magnetic field to operate.


Minolta

MD: Indicates Minolta lenses that could be used on late model, manual focus Minolta SLR's for shutter priority auto-exposure. Minolta or independent service centers could upgrade most MC lenses to MD specs.


Nikon

AF-I: Autofocus Internal Motor. The AF motor is in the lens, rather than in the camera body.

AF-S: Autofocus Silent Wave Motor. AF-S is similar to Canon's USM and Sigma's HSM technology. Developed to provide the same benefit to Nikon users and to compete with USM and HSM.

DC: Defocus Control.

ED: Extra-low Dispersion. Lens element to help correct chromatic aberrations.

G: Designates D-type lenses with camera controlled aperture settings only. Its benefit includes lighter and smaller lenses.

IF: Internal Focus.

Micro: Same as macro.


Pentax

AL: Aspherical Lens.

ED: Extra low Dispersion. Lens element to help correct chromatic aberrations.

J: Lenses without external aperture ring; camera controlled aperture.


Sigma

Sigma provides a full descriptive list of acronyms it uses. The list is located in the "Related Links" section.

DC: Sigma lenses made for small-sensor digital cameras.

DF: Dual Focus.

DG: Lenses adapted to be useable on both digital and film cameras.

DL: Deluxe. Indicates Sigma low-end lenses.

EX: Excellence. Indicates Sigma high-end lenses that are marketed to the professionals.

HSM: HyperSonic Motor. HSM is similar to Canon's USM technology. Developed to provide benefit to Sigma users and to compete with USM.

HZ: Hyperzoom. Lenses with extended zoom and focusing range.


Sony

AIS: Active Interface Shoe. AIS is a 16-pin proprietary electro-mechanical hot shoe that can accept a variety of accessories, such as microphone and light. The accessories are fully powered by this interface and require no battery of its own. Due to the sophisticated interface, AIS accessories can perform a number of specialized features that non-AIS accessories cannot.


Tamron

Di: Lenses with optics designed to combat increased reflectivity of digital sensors.


Tokina

ATX: Advanced Technology-Extra.

SZX: Manual focus lenses.


http://www.camerahacker.com/Definitions/Manufacturer_Acronyms.shtml

http://www.sigmaphoto.com/sigma-lens-technology

Viðbætur örugglega velkomnar Smile


Síðast breytt af Micaya þann 15 Júl 2011 - 0:02:42, breytt 1 sinni samtals
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DTSP


Skráður þann: 08 Nóv 2008
Innlegg: 532

Canon EOS 40D
InnleggInnlegg: 16 Apr 2011 - 0:34:30    Efni innleggs: Svara með tilvísun

Vantar TS-E og MP-E í Canon hlutann en þeir sem eru virkilega að skoða þær linsur gera sér líklega fyllilega grein fyrir hvað þetta er.
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Anansi


Skráður þann: 16 Des 2010
Innlegg: 310
Staðsetning: Það er gott að búa í Kópavogi
Nikon D7000
InnleggInnlegg: 16 Apr 2011 - 0:40:21    Efni innleggs: Svara með tilvísun

Þetta er mjög gagnlegur listi en þarna vantar nokkrar merkingar fyrir Nikon linsur

DX: Introduced in 2003, this is used to designate a lens that's designed to be used with DSLR's containing Nikons DX Sensors, also known as crop sensors. Nikons crop sensors measure approximately 15.8mm x 23.6mm, and are used in most of the current range of Nikon DSLR's, including the D300, D90, D60 and D40. DX lenses can be used on Full Frame cameras (also known as FX cameras) like the D3 and D700, however the image will be cropped. In the case of the D3 and D700, using a DX lens in DX Mode will give a 5.1 megapixel image, instead of the 12.1 megapixel image these cameras usually create. Therefore using a DX lens on an FX camera gives you the middle 42% of the image that you would get with a non-DX lens. If a lens is not marked as DX, then it will work on both FX and DX DSLR's, as well as older film DSLR's.

FX: Introduced in 2007, refers to a full frame sensor (approximately the same size as 35mm film). This term isn't explicitly used to identify Nikon Lenses, however FX is occasionally used to describe a lens that will work with an FX sensor (and 35mm film).

VR: Short for Vibration Reduction, a mechanism to counter camera shake and vibrations, by physically moving a lens or group of lenses to counter motion. VR II is the newer, improved system, but the VR lens designator is often used regardless of whether the lens has VR or VR II.

ED: Short for "Extra Low Dispersion Glass", indicates that one or more softer, more expensive lens element has been used in the lens to help prevent chromatic aberration.

ASP: Indicates a lens that has aspherical elements, which help eliminate chromatic aberration and other potential lens aberrations.

RF: Rear Focus, meaning focusing is achieved by moving the rear element of the lens.

CPU: Short for Central Processing Unit, used to designate lenses with electrical contacts in the mount to allow them to communicate with the camera body for metered operation.

AI-P or P: Short for AI with Program, used on early CPU lenses only.

AF: The first Nikon autofocus lenses were designated AF, and had a mechanical coupling in the mount to allow the autofocus motor in the camera body itself to focus the lens. Some of the current consumer Nikon DSLR's do not have focusing motors, so cameras like the Nikon D40 require the use of AF-S lenses if autofocus is needed. AF lenses will still mount to the camera, but have to be focused manually.

AF-N: A slightly improved version of AF, used on lenses that had a rubber focusing ring for manual focus, rather than a plastic one.

SWM: Silent Wave Motor, the in-lens motor used to focus the AF-S and AF-I lenses.

Pre-AI, Non-AI or NAI: This is an unofficial designation used for lenses manufactured prior to 1977, that have a prong fixed to the aperture ring that hooks up with the coupling in the camera to perform metering.

AI: Automatic Indexing, a new coupling system introduced in 1977. AI lenses still have the metering prong found on the older Pre-AI lenses, and also have a ridge and a post on the aperture ring that are used instead to communicate aperture information to the camera – as the aperture ring is turned, the ridge moves a lever in the camera mount.

AI'd: An unofficial designation that is used to refer to lenses that have been (sometimes partially) converted from non-AI to AI.

AI-S: An improvement and replacement on the AI mount, in which the lens aperture moves linearly in relation to its stop-down lever (this is indicated by a special notch in the lens mount), and AI-S lenses with a focal length of 135mm or longer are indicated by a special ridge on the lens mount (which was used by FA, F501, and F4 only).

N: Indicates the lens utilizes Nikons Nano Crystal Coat, represented by an N inside an elongated hexagon on the name plate on the lens.

SIC or NSIC: Nikon Super-integrated Coating, a lens multicoating system used to reduce flare and ghosting.

NIC: Nikon Integrated Coating, a lens coating system used to reduce flare and ghosting.

C: Used on earlier lenses to indicate the lens was coated.

PC or PC-E: Short for Perspective Control, the lens allows for shift, and often tilt movements, to control perspective and depth of field. Typically the plane in focus is parallel with the sensor in the camera, PC lenses allow you to move this plane of focus so that it is no longer parallel to the sensor, for example if you are standing at the foot of a very tall building and angling the camera upwards, a PC lens would allow you to get all of the front of the building in focus using a shallow depth of field. PC-E lens marking indicates an electromagnetic diaphragm (see E below).

Reflex: Indicates a mirror, or catadioptric lens. Usually used for longer focal lengths, the most famous being the 500mm Reflex. The design used mirrors within the lens to achieve a smaller, lighter, cheaper lens than you could get with a traditional refractive design. Reflex lenses also tend to suffer less with chromatic aberration. The disadvantage however, is that you typically have a fixed aperture lens (500mm f8 for example), the lenses can produce images with lower contrast, the lenses tend to be very wide, and out of focus elements in the image tend to be donut shaped.

UV: Lenses designed for ultraviolet photography.

Bellows: Lenses for macro photography, specifically designed to mount on a bellows unit.

Medical: A macro lens with a built in ring light flash system, designed for clinical/scientific applications.

Noct: Meaning "Night", a fast low light lens designed for maximum sharpness as the widest aperture.

Fisheye: An extreme wide angle lens that distorts the image, making the center of the image look larger and the peripheral areas more compressed.

OP: Short for Orthographic Projection, a fisheye lens that distorts more than a normal fisheye lens.

U, B, T, Q, P, H, S, O, N, D: On some lenses made prior to 1976, these letters can appear immediately before or after the word Nikkor, and indicate the number of optical elements in the design. The letters are short for Uns (1), Bini (2), Tres (3), Quatour (4), Pente (5), Hex (6), Septem (7), Octo (8), Novem (9), or Decem (10), and can be combined (e.g. BD would indicate 12 elements).

Auto: Used on earlier lenses to indicate the lens has an automatic diaphragm aperture (not autofocus)

E: Indicates the lens had an electromagnetic diaphragm, which can be operated electronically from the camera (older lenses relied on a mechanical linkage).

CRC: Short for Close Range Correction, indicates the lens has been designed for improved focus at close focusing distances, usually found on Micro lenses.

GN: Short for Guide Number, to assist with flash exposure on lenses without auto flash metering. The flashes guide number is set on the lens to modify the aperture for correct exposure.

Series E: A lower cost line of lenses made in the 1980's for consumer SLR's, and were branded "Nikon Series E" instead of Nikkor.

http://www.dentonimages.com/page.php?id=art100708
_________________
Nikon D7000
Nikkor AIS 105/2.5
Nikkor AF-S 35/1.8G DX
Nikkor AF-S 50/1.8G
Nikkor AF-S 18-105/3.5-5.6G
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karlg


Skráður þann: 09 Okt 2007
Innlegg: 8350
Staðsetning: Sverige
Olympus
InnleggInnlegg: 16 Apr 2011 - 7:25:44    Efni innleggs: Re: Linsur - merking skammstafana Svara með tilvísun

Micaya skrifaði:
G: Designates D-type lenses with camera controlled aperture settings only. Its benefit includes lighter and smaller lenses.


lol
_________________
kal.li

„Strictly handheld is the style I go.“ – MCA
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Anansi


Skráður þann: 16 Des 2010
Innlegg: 310
Staðsetning: Það er gott að búa í Kópavogi
Nikon D7000
InnleggInnlegg: 16 Apr 2011 - 9:22:57    Efni innleggs: Re: Linsur - merking skammstafana Svara með tilvísun

karlg skrifaði:
Micaya skrifaði:
G: Designates D-type lenses with camera controlled aperture settings only. Its benefit includes lighter and smaller lenses.


lol


Já lýsingin á Denton Images er sennilega nákvæmari.

G: If used immediately after the f number, this indicates a lens that does not have a manual aperture ring, the aperture can only be controlled electronically by the camera body. This means G lenses will not work with some of the older Nikon film bodies, including all non-autofocus bodies. G lenses support the same features as D lenses (see below).

D: Introduced in 1992 and short for Distance, if used immediately after the f number this indicates a lens that transmits focus distance information to the camera body, allowing it to be used with Nikons 3D Matrix Metering.
_________________
Nikon D7000
Nikkor AIS 105/2.5
Nikkor AF-S 35/1.8G DX
Nikkor AF-S 50/1.8G
Nikkor AF-S 18-105/3.5-5.6G
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Micaya


Skráður þann: 17 Des 2009
Innlegg: 4998


InnleggInnlegg: 19 Apr 2011 - 23:06:34    Efni innleggs: Svara með tilvísun

Ef þið vitið um GÓÐAN lista fyrir gamlar linsur...
Wink
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Bjossif


Skráður þann: 24 Okt 2010
Innlegg: 325
Staðsetning: Höfuðborgarsvæðið
Canon EOS 5D Mark II
InnleggInnlegg: 20 Apr 2011 - 13:50:37    Efni innleggs: Svara með tilvísun

Var einmitt að skoða lista yfir Tamron linsurnar um daginn, fann hann aftur:

AF: AutoFocus Allows the lens to automatically focus on your subject.

SP: Super Peformance Tamron’s code for “expensive” lens. You’ll get sharper glass with low chromatic aberration (purple halo around certain subject’s edge). However, expect to pay more.

Di: Digital Tamron lens with optics designed specifically for digital sensors. Can be used for full frame, smaller sensor or film cameras.

Di-II: Digital-II Tamron lens made for Cropped Sensor Digital SLR (less than 24x16mm). You should not use this for full frame or film cameras.

IF: Internal Focusing Allows lens to focus without changing size or dimension. Also make the lens more compact and lightweight as well as having faster focus and closer focusing distance.

ASL: Aspherical Minimizing lens aberration and distortion. Also make the lens more compact and lightweight due to less number of elements.

LD: Low Dispersion Minimizing sharpness fall-off due to chromatic aberration in close focusing at the telephoto end.

AD: Anomalous Dispersion Reducing chromatic aberration for telephoto lenses and lateral chromatic aberrations for wide angle lens.

XR: Extra Refractive Index Glass Making the lens shorter and more compact.

BIM: Built-In Motor Allows the lens to autofocus in camera without built in motors such as Nikon D40, D60 or D3000.

VC: Vibration Compensation Tamron’s Image stabilization method. Will reduce image blurriness due to unstable handholding. Also minimize the shake in your viewfinder, giving you clearer viewfinder when taking pictures, a VERY handy feature.

HID: High Index Dispersion Minimizing on axis and lateral chromatic aberration.

ZL: Zoom Lock Prevents undesired zoom creep (lens sliding out on its own when tilted downwards) by utilizing a lock mechanism.

AF/MF: Auto/Manual Focus Switch Allows you to switch quickly between Auto and Manual focus, a very handy features for macro lenses.
_________________
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karlg


Skráður þann: 09 Okt 2007
Innlegg: 8350
Staðsetning: Sverige
Olympus
InnleggInnlegg: 20 Apr 2011 - 13:57:06    Efni innleggs: Svara með tilvísun

Svo er komin ný græja hjá Tamron sem er PZD sem stendur fyrir Piezo Drive eða eins og þeir segja „an innovative ultrasonic autofocus motor based on an advanced piezoelectric design.“

Edit:
Ég reikna þá með að PZD sé arftaki BIM hvað Nikon mount linsur varðar.
_________________
kal.li

„Strictly handheld is the style I go.“ – MCA
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Emil
Umræðuráð


Skráður þann: 12 Feb 2009
Innlegg: 1527
Staðsetning: Álftanes
Canon 5D Mark III
InnleggInnlegg: 20 Apr 2011 - 13:59:10    Efni innleggs: Svara með tilvísun

Einnig vantar á þennan lista nýjustu tæknina hjá Tamron. Sem er USD sem virkar eins og USM hjá Canon, HSM hjá Sigma osfrv.
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5DIII | 5DII | 24-70L | 35L | 50/1.4
eMilk - Flickr
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karlg


Skráður þann: 09 Okt 2007
Innlegg: 8350
Staðsetning: Sverige
Olympus
InnleggInnlegg: 20 Apr 2011 - 14:07:37    Efni innleggs: Svara með tilvísun

eMilk skrifaði:
Einnig vantar á þennan lista nýjustu tæknina hjá Tamron. Sem er USD sem virkar eins og USM hjá Canon, HSM hjá Sigma osfrv.


En hver er munurinn á USD og PZD þar sem þetta virðist nokkurn veginn sami hluturinn?
_________________
kal.li

„Strictly handheld is the style I go.“ – MCA
Til baka efst á síðu
Skoða notanda Senda einkapóst Heimsækja heimasíðu sendanda AIM-vistfang MSN-skilaboð
Emil
Umræðuráð


Skráður þann: 12 Feb 2009
Innlegg: 1527
Staðsetning: Álftanes
Canon 5D Mark III
InnleggInnlegg: 20 Apr 2011 - 14:10:24    Efni innleggs: Svara með tilvísun

karlg skrifaði:
eMilk skrifaði:
Einnig vantar á þennan lista nýjustu tæknina hjá Tamron. Sem er USD sem virkar eins og USM hjá Canon, HSM hjá Sigma osfrv.


En hver er munurinn á USD og PZD þar sem þetta virðist nokkurn veginn sami hluturinn?


Því get ég reyndar ekki svarað.

En USD stendur fyrir Ultrasonic Silent Drive.

http://www.tamronlensreview.com/tamron70300vcreview
_________________
5DIII | 5DII | 24-70L | 35L | 50/1.4
eMilk - Flickr
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Aron
Umræðuráð


Skráður þann: 27 Nóv 2004
Innlegg: 3859

Olympus OM-2N
InnleggInnlegg: 20 Apr 2011 - 16:30:44    Efni innleggs: Svara með tilvísun

PZD er meira skylt Micro-USM eins og er í 50mm F1.4

USD er meira skylt USM eins og í 85mm F1.8

PZD er ódýrara unit og einnig ekki alveg jafn hratt og USD.

Tamron's web site skrifaði:
Ultrasonic motors are divided into two categories depending on the principle that generates the energy to move the drive: traveling wave motors and standing wave motors. Traveling wave motors include the ring-type ultrasonic motor used in the recently launched SP 70-300mm VC USD as well as other lenses, but this lens employs a newer technology, the PZD (Piezo Drive), which functions on the standing wave principle.

A standing wave ultrasonic motor utilizes high-frequency voltage to extend and turn the Piezoelectric (Piezoceramic) element, thus moving the entire element in a standing wave movement. The metal tip is the contact point of the element to the rotor, and moves in an elliptic motion from the swiveling motion of the moving element, and the friction from this motion turns the rotor. Standing wave ultrasonic motors have the distinct advantage of being smaller than their traveling wave counterparts, and therefore allow a more compact SLR lens size.

_________________
Once upon a time photographers had to manually focus. Then in the 80's they came out with single point center autofocus. Now apparently no one can take a photo with out 5+ autofocus points
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