HD Pentax-FA 77mm F/1.8 Limited

Short telephoto prime lens • Digital era

HD High Definition Coating is applied to the surface of lens elements. It boosts light transmission, ensures sharp and high contrast images, minimizes ghosting and flares.
FA Autofocus lens with mechanical coupling with camera and MTF program line support.

Model history / モデル履歴

HD Pentax-FA 77mm F/1.8 LimitedA7 - 60.7mE49 2021 
smc Pentax-FA 77mm F/1.8 LimitedA7 - 60.7mE49 1999 

Pentax SF1

35mm AF film SLR camera

Also known as: Pentax SFX
Announced: 1987
Mount: Pentax K
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
Manual
Dimensions: 157x99x63.5mm
Weight: 665g

Pentax SF10

35mm AF film SLR camera

Also known as: Pentax SF7
Announced: 1988
Mount: Pentax K
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: 152.5x96x63.5mm
Weight: 630g

Pentax SF1n

35mm AF film SLR camera

Also known as: Pentax SFXn
Announced: 1989
Mount: Pentax K
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: 154.5x99x63.5mm
Weight: 665g

Pentax PZ-1

35mm AF film SLR camera

Announced: 1991
Mount: Pentax K
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: 152x95.5x74mm
Weight: 650g

Pentax PZ-10

35mm AF film SLR camera

Announced: 1991
Mount: Pentax K
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
Manual
Dimensions: 146x92.5x66.5mm
Weight: 490g

Pentax PZ-20

35mm AF film SLR camera

Announced: 1992
Mount: Pentax K
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: 146x93x66mm
Weight: 500g

Pentax PZ-50

35mm AF film SLR camera

Announced: 1992
Mount: Pentax K
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: 146x93x66mm
Weight: 500g

Pentax PZ-1P

35mm AF film SLR camera

Announced: 1994
Mount: Pentax K
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: 152x95.5x74mm
Weight: 650g

Pentax PZ-5P

35mm AF film SLR camera

Announced: 1994
Mount: Pentax K
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
Manual
Dimensions: 152x95.5x74mm
Weight: 650g

Pentax PZ-70

35mm AF film SLR camera

Announced: 1995
Mount: Pentax K
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: 146x93x66.5mm
Weight: 450g

Pentax ZX-10

35mm AF film SLR camera

Also known as: Pentax MZ-10
Announced: 1996
Mount: Pentax K
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: 135x90.5x62.5mm
Weight: 365g

Pentax ZX-5

35mm AF film SLR camera

Also known as: Pentax MZ-5
Announced: 1996
Mount: Pentax K
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: 135x90x61.5mm
Weight: 400g

Pentax MZ-3

35mm AF film SLR camera

Announced: 1997
Mount: Pentax K
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: 135x90x61.5mm
Weight: 410g

Pentax ZX-50

35mm AF film SLR camera

Also known as: Pentax MZ-50
Announced: 1997
Mount: Pentax K
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: 135x90.5x63.5mm
Weight: 345g

Pentax ZX-5n

35mm AF film SLR camera

Also known as: Pentax MZ-5n
Announced: 1997
Mount: Pentax K
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: 135x90x61.5mm
Weight: 410g

Pentax ZX-7

35mm AF film SLR camera

Also known as: Pentax MZ-7
Announced: 1999
Mount: Pentax K
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: 135.5x92x63.5mm
Weight: 380g

Pentax ZX-30

35mm AF film SLR camera

Also known as: Pentax MZ-30
Announced: 2000
Mount: Pentax K
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: 135.5x92x63.5mm
Weight: 360g

Pentax MZ-S

35mm AF film SLR camera

Announced: 2001
Mount: Pentax K
Format: 36 × 24mm
Shutter type: Focal-plane
Shutter model: Electronically controlled
Speeds: 30 - 1/6000 + B
Exposure metering: Through-the-lens (TTL)
Exposure modes: Aperture-priority Auto
Shutter-priority Auto
Manual
Dimensions: 136.5x95x64mm
Weight: 520g

Pentax ZX-L

35mm AF film SLR camera

Also known as: Pentax MZ-6
Announced: 2001
Mount: Pentax K
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: 135.5x92x63mm
Weight: 385g

Pentax ZX-60

35mm AF film SLR camera

Also known as: Pentax MZ-60
Announced: 2002
Mount: Pentax K
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: 136x94.5x63mm
Weight: 325g

Pentax *ist

35mm AF film SLR camera

Announced: 2003
Mount: Pentax K
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: 111x84x63.5mm
Weight: 335g

Pentax K-1

35mm AF digital SLR camera

Announced: Feb 2016
Mount: Pentax K
Format: 35.9 × 24mm
Resolution: 7360 × 4912 - 36 MP
Sensor type: CMOS
Image stabilizer: Yes

Pentax K-1 Mark II

35mm AF digital SLR camera

Announced: Feb 2018
Mount: Pentax K
Format: 35.9 × 24mm
Resolution: 7360 × 4912 - 36 MP
Sensor type: CMOS
Image stabilizer: Yes

Designed for / のために設計された

Click to expand or collapse section(s)

Features highlight / 機能のハイライト

F.E.
Body AF
Compact
SP
Built-in hood

Specification / 仕様

Production status and name / 生産状況と名称
Announced / 発表: February 2021
Production status / 生産状況: In production
Original name / 元の名前: HD PENTAX-FA 1:1.8 77mm Limited
Optical design / 光学設計
Maximum format / 最大フォーマット: 35mm full frame
Mount / マウント: Pentax K
Diagonal angle of view / 対角画角: 31.4° (35mm full frame)
20.8° (Pentax K APS-C)
Lens construction / レンズ構造: 7 elements - 6 groups
Floating element system
Diaphragm mechanism / ダイヤフラムメカニズム
Diaphragm control system / ダイヤフラム制御システム: Mechanical
Number of blades / 絞り羽根の数: 9
Focusing / フォーカシング
Closest focusing distance / 最短撮影距離: 0.7m
Maximum magnification ratio / 最大倍率: 1:7.14 at the closest focusing distance
Focusing method / フォーカシング方法: <No information>
Focusing modes / フォーカシングモード: Autofocus, manual focus
Manual focus control / マニュアルフォーカス制御: Focusing ring
Autofocus motor / オートフォーカスモーター: In-camera motor
Focus mode selector / フォーカスモードセレクター: None; focusing mode is set from the camera
Quick-Shift Focus System (QFS): -
Image stabilizer / 手ぶれ補正
Shake Reduction (SR): -
Physical characteristics / 体格的特徴
Weight / 重量: 270g
Maximum diameter x Length / 最大直径x長さ: ⌀64×48mm
Weather sealing / ウェザーシーリング: -
Super Protect (SP) coating: Front element
Accessories / 付属品
Filters / フィルタ: Screw-type 49mm
Lens hood / レンズフード: Built-in telescopic round
  • Toggle description in Japanese

    メーカーの説明

    “白いワイシャツの貝ボタンの輝き”を描き出す

    絞りにより表現が変わるため、撮るプロセスを存分に

    愉しめるレンズ

    球面収差をコーティングによって波長ごとに巧みにコントロールし、色のにじみを抑えるとともに、鏡筒内の墨塗りの成分までこだわり抜き内面反射を抑制。白い被写体の中にある緻密な陰影や、白の中のハイエストライト(一番明るい部分)まで描き分けることをテーマとして設計されています。

    smc PENTAX-FA 77mmF1.8 Limitedで定評のあった赤系色の発色の良さを引き継いでいるため人物撮影にも最適。新たに採用したHDコーティングは、悪条件下で特にこの特徴的な赤系色のヌケの良さを描写するようにしています。

    今回あらたに円形絞りの採用により開放からF4まで絞り込んでも自然で美しいボケが得られます。

    これまで多くの方に愛されてきた、smc PENTAX-FA 77mmF1.8 Limitedの持ち味はそのままに、数値では測れない部分にまだこだわり、描写性能を磨き上げました。

    また、第1面のレンズには撥水・撥油性、耐擦傷性を備えたSPコーティングも追加したことで、メンテナンス性も向上。レンズフードは本体へ組み込み式の伸縮構造とすることで、撮影、収納をスムーズに行えるようにし、撮る行為、そのものを愉しめるよう配慮しています。

    描写や質感にもこだわった高品位レンズ

    「リミテッドレンズ」シリーズの設計コンセプトを踏襲し、試験機等による数値評価だけでなく、実写による画質評価を繰り返して設計にフィードバックすることで“レンズの味”までも追求しています。

    外観においては、レンズ鏡筒、フード、キャップには高級感のあるアルミ削り出しの素材を採用し、本体の質感にもこだわった仕上がりになっています。

    また、七宝焼きを施した“フィンガーポイント”を採用し、カメラボディへの装着性を高めています。

    描写性能を高める“HDコーティング注1”

    独自の高性能マルチコーティング“HDコーティング注1”を採用しています。従来のマルチコーティングに比べ、より反射が少なく透過率が高いので、逆光など光線状態の厳しい撮影条件下でゴーストやフレアーの発生を抑え、クリアな描写を実現しています。これにより、ヌケの良さに拘った「リミテッドレンズ」の描写をさらに引き立てます。

    注1:「HD」はHigh Definitionの略。

    美しいボケ味が得られる円形絞り

    新たに円形絞りを採用。リミテッドレンズならではの描写を引き立たせる、より自然で美しいボケ味を実現しています。

    汚れや傷が付きにくい”SP(Super Protect)コーティング"を採用

    高い撥水性、撥油性をもつ独自の特殊コーティングをレンズの第1面に採用し、ホコリや水滴、油などが付きにくいだけでなく、万一汚れが付着した場合でも、簡単に汚れを落としやすくなっています。さらに耐擦傷性にすぐれ、傷が付きにくいという特長を備えています。

    その他

    ブラックは0000001から、シルバーは1000001から始まる連番シリアルナンバーを採用。

    絞りリングにより、K マウントフィルム一眼レフカメラの各機能が利用可能。

Manufacturer description #1

Building on the long tradition of PENTAX Limited Edition lenses, RICOH COMPANY, LTD. and RICOH IMAGING COMPANY, LTD are pleased to announce three new editions to the three HD PENTAX-FA Limited lenses – featuring the original PENTAX HD coating, which now significantly enhances the lenses by minimising light reflections and ghosting.

When PENTAX first introduced the 'Limited Series' some 25 years ago, they were developed at the time of traditional SLR technology. The first thing that caught the eye were the focal length designations. A wide-angle, with 31 mm, a standard lens with 43 mm and a portrait lens with 77 mm formed a series, offering a high standard in imaging quality and technical construction. Attention to these details make these lenses special masterpieces. The original character has stood the test of time, and again provided the foundation of the new HD PENTAX-FA Limited series:

  • HD PENTAX-FA 31mm F1.8 Limited
  • HD PENTAX-FA 43mm F1.9 Limited
  • HD PENTAX-FA 77mm F1.8 Limited

Due to the sophisticated manufacturing process, each of these lenses is a masterpiece and was already the reason for many photographers to opt for this system in the days of analogue photography. A 35mm camera with three fixed focal lengths is a set-up that, even today in digital photography, represents a special approach and shows respect for traditional photography. PENTAX has decided to remain true to the philosophy that has been at the forefront of many new techniques since the beginning of camera production in Japan and is still the standard in modern photographic technology today.

And so we also find in the new series focal lengths that correspond directly to the technical calculation and are not rounded to the nearest number in order to better fit into a line-up. Also, a rather unusual feature today is the mechanical aperture selection directly on the lens with the matching depth-of-field scale above the aperture ring. A small but intricate detail are the markings on the aluminium bodies of the lenses, which make it possible to change lenses without looking.

The lens elements are treated with the multi-layer HD (High Definition) coating developed by PENTAX. Compared to conventional coatings, it offers a significantly higher light transmission with low reflection (up to 50 % compared to conventional coatings). This allows for maximum contrast and sharpness without flare and ghosting - even under difficult conditions such as backlighting. This is made possible by an exclusive PENTAX special manufacturing process, where a high-density coating is applied with high precision at the nanometre level. Which also has an extremely high hardness for superior durability.

In addition, the front lenses are provided with the original PENTAX SP (Super Protect) Coating. A fluorine coating protects the lens surface and has a repellent effect that not only repels dust, water and grease, but also makes it easier to wipe these substances off the lens surface. It is also highly resistant to abrasion and scratching and helps to keep the lens in top condition.

With the new HD PENTAX FA-Limited series, PENTAX follows its basic principles and stands for outstanding image reproduction with high detail fidelity with sharp and clear image reproduction, free from flare and ghosting.

The lenses are supplied with a built-in or corresponding screw-in lens hood and an exclusive lens cap, also made of aluminium, as well as a lens bag. They are each offered in silver (serial numbers starting with 00001) and black (serial numbers starting with 10001).

Manufacturer description #2

A fun-to-use lens that makes the photo-shooting process more enjoyable, by delivering a varied image rendition for a given aperture, while faithfully depicting images such as the luster of shell buttons on a white shirt.

This lens features a coating which effectively controls spherical aberration at different wavelengths to minimize color bleeding, while greatly reducing internal reflections by applying the most efficient black coating to the interior of the lens barrel. It is designed to faithfully reproduce delicate shades in white subjects, and clearly depict the brightest spot in highlight areas. Because the lens inherits the outstanding rendition of warm colors from the smc PENTAX-FA 77mm F1.8 Limited, it is an ideal lens for portraiture or snapshots of people. It also features the PENTAX-original HD coating* to produce distinctive warm colors even under adverse conditions, and a completely round-shaped diaphragm to produce a natural, beautiful bokeh (defocus) effect from open aperture to F4.

While retaining the distinctive optical performance of the smc PENTAX-FA 77mm F1.8 Limited, this lens delivers exceptional imaging power, made possible by the meticulous attention PENTAX paid even to the details that can’t be measured simply by numerical factors. In addition, the SP (Super Protect) coating has been applied to the front optical element to improve the water/grease-repellent and scratch-resistant performance, while enhancing ease of maintenance. The extendible lens hood is built into the lens barrel to simplify light-shielding and storage operations. All these features add fun to picture-taking, and let you enjoy the entire process of photo shooting.

Features / Specifications

High-grade lens with superb image rendition and beautiful texture

While inheriting the design concept of the Limited series, this lens was designed through a series of mechanical and numerical evaluations, as well as human assessment of test-shooting samples, to deliver an image rendition unmatched by other models. The barrel, hood and cap are all made of high-grade aluminum, meticulously machined for an attractive appearance and beautiful texture. It also features a mount pointer with a shippoyaki (cloisonné) finish, which lets the user effortlessly and quickly mount the lens to a camera body.

HD coating for exceptional image rendition

This lens is treated with PENTAX-original HD coating.* Compared with conventional multi-layer coatings, this high-grade coating assures higher light transmittance and lower reflectance to deliver sharp, clear images free of flare and ghost images, even under such adverse lighting conditions as backlight. It elevates the imaging performance a further step up.

Round-shaped diaphragm for beautiful bokeh effect

This lens features a completely round-shaped diaphragm, which produces a natural, beautiful bokeh (defocus) effect in the images captured, while optimizing the imaging performance of the distinctive Limited-series optics contained within.

SP coating to repel dust and protect lens surface

Applied to the front optical element, the PENTAX-developed SP (Super Protect) coating effectively repels water and grease to keep the lens surface free of dust, water and oily substances. This coating is also highly resistant to abrasion and scratches, keeping the lens scratch-free.

Other features

The black model is marked with serial numbers starting with 0000001, while the silver model starts with 1000001. The lens also features an aperture ring to make best use of the range of functions featured in K-mount film-format cameras.

Typical application / 典型的なアプリケーション

portraits, street, travel

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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.

Technical masterpiece

This Limited lens is not only capable of producing excellent photos, but also gives aesthetic pleasure to its owner.

One of the best fast short telephoto primes

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

Unable to follow the link

You are already on the page dedicated to this lens.

Cannot perform comparison

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.

Model produced in a small batch. It is collectible and can only be found on the secondary market.

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.

In-camera motor

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.

Floating element system

Provides correction of aberrations and ensures constantly high image quality at the entire range of focusing distances from infinity down to the closest focusing distance. It is particularly effective for the correction of field curvature that tends to occur with large-aperture, wide-angle lenses when shooting at close ranges.

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".

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Manual focus override in autofocus mode

Allows to perform final focusing manually after the camera has locked the focus automatically. Note that you don't have to switch camera and/or lens to manual focus mode.

Electronic manual focus override is performed in the following way: half-press the shutter button, wait until the camera has finished the autofocusing and then focus manually without releasing the shutter button using the focusing ring.

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.

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.