Nikon AI-S Micro-Nikkor 105mm F/4

Macro lens • Film era • Discontinued

AI-S A manual focus lens with automatic maximum aperture indexing and automatic aperture control.
MICRO Macro lens. Designed specially for shooting close-ups of small subjects but can be also used in other genres of photography, not necessarily requiring focusing at close distances.

Model history

Nikon AI-S Micro-Nikkor 105mm F/41:2A5 - 30.47m⌀52 1981 
Nikon AI Micro-Nikkor 105mm F/41:2A5 - 30.47m⌀52 1977 
Nikon Micro-Nikkor 105mm F/41:2A5 - 30.47m⌀52 1975 

Sample photos uploaded by users

F/???

Nikon F

35mm MF film SLR camera

Announced:April 1959
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:1 - 1/1000 + B
Exposure metering:No

Nikkormat FS

35mm MF film SLR camera

Announced:1965
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:1 - 1/1000 + B
Exposure metering:No
Dimensions:146x95x33mm
Weight:715g

Nikkormat FT

35mm MF film SLR camera

Announced:1965
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:1 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Dimensions:146x95x33mm
Weight:745g

Nikkormat FTN

35mm MF film SLR camera

Announced:1967
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:1 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Dimensions:148x95x54mm
Weight:765g

Nikon F2

35mm MF film SLR camera

Announced:November 1971
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:10 - 1/2000 + B
Exposure metering:No
Dimensions:152.5x98x65mm
Weight:730g

Nikkormat EL

35mm MF film SLR camera

Announced:1972
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:4 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Aperture-priority Auto
Manual
Dimensions:145x93.5x54.5mm
Weight:780g

Nikkormat FT2

35mm MF film SLR camera

Announced:1975
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:1 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Dimensions:148x96x54mm
Weight:780g

Nikkormat ELW

35mm MF film SLR camera

Announced:1976
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:4 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Aperture-priority Auto
Manual
Dimensions:145x93.5x54.5mm
Weight:790g

Nikkormat FT3

35mm MF film SLR camera

Announced:1977
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:1 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Dimensions:148x96x54mm
Weight:750g

Nikon EL2

35mm MF film SLR camera

Announced:1977
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:8 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Aperture-priority Auto
Manual
Dimensions:145x93.5x54.5mm
Weight:780g

Nikon FM

35mm MF film SLR camera

Announced:1977
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:1 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Dimensions:142x89.5x60.5mm
Weight:590g

Nikon FE

35mm MF film SLR camera

Announced:1978
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:8 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Aperture-priority Auto
Manual
Dimensions:142x89.5x57.5mm
Weight:590g

Nikon EM

35mm MF film SLR camera

Announced:1979
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:1 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Aperture-priority Auto
Dimensions:135x86x54mm
Weight:460g

Nikon F3

35mm MF film SLR camera

Announced:1980
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:8 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Aperture-priority Auto
Manual
Dimensions:148.5x96.5x65.5mm
Weight:700g

Nikon FG

35mm MF film SLR camera

Announced:1982
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:1 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Manual
Dimensions:136x87.5x54mm
Weight:490g

Nikon FM2

35mm MF film SLR camera

Announced:1982
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:1 - 1/4000 + B
Exposure metering:Through-the-lens (TTL)
Dimensions:142.5x90x60mm
Weight:540g

Nikon FA

35mm MF film SLR camera

Announced:1983
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:1 - 1/4000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:142.5x92x64.5mm
Weight:625g

Nikon FE2

35mm MF film SLR camera

Announced:1983
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:8 - 1/4000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Aperture-priority Auto
Manual
Dimensions:142.5x90x57.5mm
Weight:550g

Nikon FG-20

35mm MF film SLR camera

Announced:1984
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:1 - 1/1000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Aperture-priority Auto
Manual
Dimensions:136x88x54mm
Weight:440g

Nikon N2000

35mm MF film SLR camera

Also known as:Nikon F-301
Announced:1985
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:1 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Manual
Dimensions:148.5x97.5x54.5mm
Weight:570g

Nikon N2020

35mm AF film SLR camera

Also known as:Nikon F-501
Announced:1986
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:1 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Manual
Dimensions:148.5x97.5x54.5mm
Weight:610g

Nikon N4004

35mm AF film SLR camera

Also known as:Nikon F-401
Announced:1987
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:1 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:154x102x65.5mm
Weight:645g

Nikon F4

35mm AF film SLR camera

Announced:1988
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/8000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:168.5x117.5x76.5mm
Weight:1090g

Nikon N8008

35mm AF film SLR camera

Also known as:Nikon F-801
Announced:1988
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/8000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:153.6x102.5x67.5mm
Weight:695g

Nikon N4004S

35mm AF film SLR camera

Also known as:Nikon F-401S
Announced:1989
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:1 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:154x102x65.5mm
Weight:650g

Nikon N6000

35mm MF film SLR camera

Also known as:Nikon F-601M
Announced:1990
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:154.5x96x65mm
Weight:565g

Nikon N6006

35mm AF film SLR camera

Also known as:Nikon F-601
Announced:1990
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:154.5x100x66.5mm
Weight:650g

Nikon N5005

35mm AF film SLR camera

Also known as:Nikon F-401X
Announced:1991
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:154x102x65mm
Weight:647g

Nikon N8008S

35mm AF film SLR camera

Also known as:Nikon F-801S
Announced:1991
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/8000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:154x103x67mm
Weight:695g

Nikon N90

35mm AF film SLR camera

Also known as:Nikon F90
Announced:1992
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/8000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:154x106x69mm
Weight:755g

Nikon N50

35mm AF film SLR camera

Also known as:Nikon F50
Announced:1994
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:149x96x70mm
Weight:580g

Nikon N70

35mm AF film SLR camera

Also known as:Nikon F70
Announced:1994
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/4000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:151x103x70mm
Weight:585g

Nikon N90S

35mm AF film SLR camera

Also known as:Nikon F90X
Announced:1994
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/8000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:154x106x69mm
Weight:755g

Nikon FM10

35mm MF film SLR camera

Announced:1995
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Mechanical
Speeds:1 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Dimensions:139x86x53mm
Weight:420g

Nikon F5

35mm AF film SLR camera

Announced:1996
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/8000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:158x149x79mm
Weight:1210g

Nikon FE10

35mm MF film SLR camera

Announced:1996
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:8 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Aperture-priority Auto
Manual
Dimensions:139x86x53mm
Weight:400g

Nikon F100

35mm AF film SLR camera

Announced:1999
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/8000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:155x113x66mm
Weight:785g

Nikon N60

35mm AF film SLR camera

Also known as:Nikon F60
Announced:1999
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:148.5x96x69mm
Weight:575g

Nikon N65

35mm AF film SLR camera

Also known as:Nikon F65
Announced:2000
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:139.5x92.5x65.5mm
Weight:395g

Nikon N80

35mm AF film SLR camera

Also known as:Nikon F80
Announced:2000
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/4000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:141.5x98.5x71mm
Weight:515g

Nikon FM3A

35mm MF film SLR camera

Announced:2001
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:8 - 1/4000 + B
Exposure metering:Through-the-lens (TTL)
Dimensions:142.5x90x58mm
Weight:570g

Nikon N55

35mm AF film SLR camera

Also known as:Nikon F55
Announced:2002
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:129x92x65mm
Weight:350g

Nikon N75

35mm AF film SLR camera

Also known as:Nikon F75
Announced:2003
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/2000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:131x92.5x65mm
Weight:380g

Nikon F6

35mm AF film SLR camera

Announced:2004
Mount:Nikon F
Format:36 × 24mm
Shutter type:Focal-plane
Shutter model:Electronically controlled
Speeds:30 - 1/8000 + B
Exposure metering:Through-the-lens (TTL)
Exposure modes:Programmed Auto
Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions:157x119x78.5mm
Weight:975g

Nikon D3

35mm AF digital SLR camera

Announced:August 2007
Mount:Nikon F
Format:36 × 23.9mm
Resolution:4256 × 2832 - 12 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D700

35mm AF digital SLR camera

Announced:July 2008
Mount:Nikon F
Format:36 × 23.9mm
Resolution:4256 × 2832 - 12 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D3X

35mm AF digital SLR camera

Announced:December 2008
Mount:Nikon F
Format:35.9 × 24mm
Resolution:6048 × 4032 - 24 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D3s

35mm AF digital SLR camera

Announced:October 2009
Mount:Nikon F
Format:36 × 23.9mm
Resolution:4256 × 2832 - 12 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D4

35mm AF digital SLR camera

Announced:January 2012
Mount:Nikon F
Format:36 × 23.9mm
Resolution:4928 × 3280 - 16 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D800

35mm AF digital SLR camera

Announced:February 2012
Mount:Nikon F
Format:35.9 × 24mm
Resolution:7360 × 4912 - 36 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D800E

35mm AF digital SLR camera

Announced:February 2012
Mount:Nikon F
Format:35.9 × 24mm
Resolution:7360 × 4912 - 36 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D600

35mm AF digital SLR camera

Announced:September 2012
Mount:Nikon F
Format:35.9 × 24mm
Resolution:6016 × 4016 - 24 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D610

35mm AF digital SLR camera

Announced:October 2013
Mount:Nikon F
Format:35.9 × 24mm
Resolution:6016 × 4016 - 24 MP
Sensor type:CMOS
Image stabilizer:-

Nikon Df

35mm AF digital SLR camera

Announced:November 2013
Mount:Nikon F
Format:36 × 23.9mm
Resolution:4928 × 3280 - 16 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D4s

35mm AF digital SLR camera

Announced:February 2014
Mount:Nikon F
Format:36 × 23.9mm
Resolution:4928 × 3280 - 16 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D810

35mm AF digital SLR camera

Announced:June 2014
Mount:Nikon F
Format:35.9 × 24mm
Resolution:7360 × 4912 - 36 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D750

35mm AF digital SLR camera

Announced:September 2014
Mount:Nikon F
Format:35.9 × 24mm
Resolution:6016 × 4016 - 24 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D810A

35mm AF digital SLR camera

Announced:February 2015
Mount:Nikon F
Format:35.9 × 24mm
Resolution:7360 × 4912 - 36 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D5

35mm AF digital SLR camera

Announced:January 2016
Mount:Nikon F
Format:35.9 × 23.9mm
Resolution:5588 × 3712 - 21 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D850

35mm AF digital SLR camera

Announced:August 2017
Mount:Nikon F
Format:35.9 × 23.9mm
Resolution:8256 × 5504 - 45 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D780

35mm AF digital SLR camera

Announced:January 2020
Mount:Nikon F
Format:35.9 × 23.9mm
Resolution:6048 × 4024 - 24 MP
Sensor type:CMOS
Image stabilizer:-

Nikon D6

35mm AF digital SLR camera

Announced:February 2020
Mount:Nikon F
Format:35.9 × 23.9mm
Resolution:5568 × 3712 - 21 MP
Sensor type:CMOS
Image stabilizer:-

Designed for

Features highlight

Auto
MF
Macro 1:2
Built-in hood

Specification

Production details
Announced:September 1981
Production status:Discontinued
Production type:Mass production
Original name:Nikon Micro-NIKKOR 105mm 1:4
Optical design
Focal length:105mm
Speed:F/4
Maximum format:35mm full frame
Mount:Nikon F
Flange focal distance:46.5mm
Diagonal angle of view:23.3° (35mm full frame)
15.3° (Nikon F APS-C)
Lens construction:5 elements - 3 groups
Diaphragm mechanism
Diaphragm type:Automatic
Number of blades:7
Focusing
Closest focusing distance:0.47m
Maximum magnification ratio:1:2 at the closest focusing distance
Focusing method:<No information>
Focusing modes:Manual focus only
Manual focus control:Focusing ring
Physical characteristics
Weight:500g
Maximum diameter x Length:⌀68.5×96mm
Accessories
Filters:Screw-type 52mm
Lens hood:Built-in telescopic round

Typical application

travel, macrophotography and product photography

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35mm full frame

43.27 24 36
  • Dimensions: 36 × 24mm
  • Aspect ratio: 3:2
  • Diagonal: 43.27mm

Travellers' choice

Note

Among autofocus lenses designed for 35mm full-frame mirrorless cameras only. Speed of standard and telephoto lenses is taken into account.

Professional lens

One of the best short telephoto macro primes

According to lens-db.com; among lenses designed for the same maximum format and mount.

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You are already on the page dedicated to this lens.

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Cannot compare the lens to itself.

Quality control issues

The manufacturer of this lens does not provide adequate quality control. If you do decide to purchase this lens, do not order it online, but choose the best copy available in the store. In any case, there may also be problems with the build quality, and warranty repairs can take months.

Image stabilizer

A technology used for reducing or even eliminating the effects of camera shake. Gyro sensors inside the lens detect camera shake and pass the data to a microcomputer. Then an image stabilization group of elements controlled by the microcomputer moves inside the lens and compensates camera shake in order to keep the image static on the imaging sensor or film.

The technology allows to increase the shutter speed by several stops and shoot handheld in such lighting conditions and at such focal lengths where without image stabilizer you have to use tripod, decrease the shutter speed and/or increase the ISO setting which can lead to blurry and noisy images.

MF

Sorry, no additional information is available.

Original name

Lens name as indicated on the lens barrel (usually on the front ring). With lenses from film era, may vary slightly from batch to batch.

Format

Format refers to the shape and size of film or image sensor.

35mm is the common name of the 36x24mm film format or image sensor format. It has an aspect ratio of 3:2, and a diagonal measurement of approximately 43mm. The name originates with the total width of the 135 film which was the primary medium of the format prior to the invention of the full frame digital SLR. Historically the 35mm format was sometimes called small format to distinguish it from the medium and large formats.

APS-C is an image sensor format approximately equivalent in size to the film negatives of 25.1x16.7mm with an aspect ratio of 3:2.

Medium format is a film format or image sensor format larger than 36x24mm (35mm) but smaller than 4x5in (large format).

Angle of view

Angle of view describes the angular extent of a given scene that is imaged by a camera. It is used interchangeably with the more general term field of view.

As the focal length changes, the angle of view also changes. The shorter the focal length (eg 18mm), the wider the angle of view. Conversely, the longer the focal length (eg 55mm), the smaller the angle of view.

A camera's angle of view depends not only on the lens, but also on the sensor. Imaging sensors are sometimes smaller than 35mm film frame, and this causes the lens to have a narrower angle of view than with 35mm film, by a certain factor for each sensor (called the crop factor).

This website does not use the angles of view provided by lens manufacturers, but calculates them automatically by the following formula: 114.6 * arctan (21.622 / CF * FL),

where:

CF – crop-factor of a sensor,
FL – focal length of a lens.

Mount

A lens mount is an interface — mechanical and often also electrical — between a camera body and a lens.

A lens mount may be a screw-threaded type, a bayonet-type, or a breech-lock type. Modern camera lens mounts are of the bayonet type, because the bayonet mechanism precisely aligns mechanical and electrical features between lens and body, unlike screw-threaded mounts.

Lens mounts of competing manufacturers (Canon, Nikon, Pentax, Sony etc.) are always incompatible. In addition to the mechanical and electrical interface variations, the flange focal distance from the lens mount to the film or sensor can also be different.

Lens construction

Lens construction – a specific arrangement of elements and groups that make up the optical design, including type and size of elements, type of used materials etc.

Element - an individual piece of glass which makes up one component of a photographic lens. Photographic lenses are nearly always built up of multiple such elements.

Group – a cemented together pieces of glass which form a single unit or an individual piece of glass. The advantage is that there is no glass-air surfaces between cemented together pieces of glass, which reduces reflections.

Flange focal distance

The flange focal distance (FFD), sometimes called the "flange back", is the distance from the mechanical rear end surface of the lens mount to the focal plane.

Focal length

The focal length is the factor that determines the size of the image reproduced on the focal plane, picture angle which covers the area of the subject to be photographed, depth of field, etc.

Speed

The largest opening or stop at which a lens can be used is referred to as the speed of the lens. The larger the maximum aperture is, the faster the lens is considered to be. Lenses that offer a large maximum aperture are commonly referred to as fast lenses, and lenses with smaller maximum aperture are regarded as slow.

In low-light situations, having a wider maximum aperture means that you can shoot at a faster shutter speed or work at a lower ISO, or both.

Closest focusing distance

The minimum distance from the focal plane (film or sensor) to the subject where the lens is still able to focus.

Closest working distance

The distance from the front edge of the lens to the subject at the maximum magnification.

Magnification ratio

Determines how large the subject will appear in the final image. For example, a magnification ratio of 1:1 means that the image of the subject formed on the film or sensor will be the same size as the subject in real life. For this reason, a 1:1 ratio is often called "life-size".

Electromagnetic diaphragm control system

Provides highly accurate diaphragm control and stable auto exposure performance during continuous shooting.

Convex protruding front element

The convex front element protrudes from the lens barrel, making it impossible to use filters.

Manual diaphragm

The diaphragm must be stopped down manually by rotating the detent aperture ring.

Preset diaphragm

The lens has two rings, one is for pre-setting, while the other is for normal diaphragm adjustment. The first ring must be set at the desired aperture, the second ring then should be fully opened for focusing, and turned back for stop down to the pre-set value.

Semi-automatic diaphragm

The lens features spring mechanism in the diaphragm, triggered by the shutter release, which stops down the diaphragm to the pre-set value. The spring needs to be reset manually after each exposure to re-open diaphragm to its maximum value.

Automatic diaphragm

The camera automatically closes the diaphragm down during the shutter operation. On completion of the exposure, the diaphragm re-opens to its maximum value.

Number of blades

As a general rule, the more blades that are used to create the aperture opening in the lens, the rounder the out-of-focus highlights will be.

Some lenses are designed with curved diaphragm blades, so the roundness of the aperture comes not from the number of blades, but from their shape. However, the fewer blades the diaphragm has, the more difficult it is to form a circle, regardless of rounded edges.

At maximum aperture, the opening will be circular regardless of the number of blades.

Weight

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

Maximum diameter x Length

Excluding case or pouch, caps and other detachable accessories (lens hood, close-up adapter, tripod adapter etc.).

For lenses with collapsible design, the length is indicated for the working (retracted) state.

Weather sealing

A rubber material which is inserted in between each externally exposed part (manual focus and zoom rings, buttons, switch panels etc.) to ensure it is properly sealed against dust and moisture.

Lenses that accept front mounted filters typically do not have gaskets behind the filter mount. It is recommended to use a filter for complete weather resistance when desired.

Fluorine coating

Helps keep lenses clean by reducing the possibility of dust and dirt adhering to the lens and by facilitating cleaning should the need arise. Applied to the outer surface of the front and/or rear lens elements over multi-coatings.

Filters

Lens filters are accessories that can protect lenses from dirt and damage, enhance colors, minimize glare and reflections, and add creative effects to images.

Lens hood

A lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background.

The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood.

Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens.

Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space. In addition, lens hoods can offer some degree of physical protection for the lens due to the hood extending farther than the lens itself.