smc Pentax-D FA 100mm F/2.8 Macro WR

Macro lens • Pro • Digital era • Discontinued

Sample photos

F/11
F/5.6
F/4.5
F/4.5
F/2.8
F/2.8
F/2.8
F/2.8
F/4

Abbreviations

SMC The multi-layer coating is applied to the surface of lens elements. It boosts light transmission, ensures sharp and high contrast images, minimizes ghosting and flares. Learn more
D FA Autofocus lens which is optimized for Pentax digital SLR cameras but can be also used on Pentax film SLR cameras.
MACRO 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. Learn more
WR Water-Resistant lens.

Production details

Announced:December 2009
Production type:Mass production
Production status: Discontinued
Original name:SMC PENTAX-DFA MACRO 1:2.8 100mm WR
System:Pentax K (1975)

Model history (6)

smc Pentax-A 100mm F/2.8 Macro1:1A7 - 70.31m⌀58 1985 
smc Pentax-F 100mm F/2.8 Macro1:1A9 - 80.306m⌀58 1987 
smc Pentax-FA 100mm F/2.8 Macro1:1A9 - 80.306m⌀58 1991 
smc Pentax-D FA 100mm F/2.8 Macro (Schneider-KREUZNACH D-Xenon)1:1A9 - 80.303m⌀49 2004 
smc Pentax-D FA 100mm F/2.8 Macro WR1:1A9 - 80.303m⌀49 2009 
HD Pentax-D FA 100mm F/2.8 ED AW Macro1:1A10 - 80.303m⌀49 2022 
HD Pentax-D FA 100mm F/2.8 ED AW Macro Silver (300 units)1:1 2022 

Features highlight

Fast
F.E.
8 blades
Macro 1:1
Body AF
QFS
WR
SP
⌀49
filters
TC

Specification

Optical design
Focal length:100mm
Speed:F/2.8
Maximum format:35mm full frame
Mount and Flange focal distance:Pentax K [45.5mm]
Diagonal angle of view:24.4°
Lens construction:9 elements - 8 groups
Floating element system
Diaphragm mechanism
Diaphragm type:Automatic
Aperture control:None; the aperture is controlled from the camera
Number of blades:8 (eight)
Focusing
Closest focusing distance:0.303m
Closest working distance:0.13m
Maximum magnification ratio:1:1 at the closest focusing distance
Focusing modes:Autofocus, manual focus
Manual focus control:Focusing ring
Autofocus motor:In-camera motor
Focus mode selector:None; focusing mode is set from the camera
Quick-Shift Focus System (QFS):Yes
Shake Reduction (SR)
Built-in SR:-
Physical characteristics
Weight:340g
Maximum diameter x Length:⌀65×80.5mm
Weather sealing:Water-resistant barrel
Super Protect (SP) coating:Front element
Accessories
Filters:Screw-type 49mm
Lens hood:Bayonet-type PH-RBE49 (round)
Teleconverters:HD Pentax-DA 1.4X AF Rear Converter AW → 140mm F/3.9

*) Source of data: Manufacturer's technical data.

35mm equivalent focal length and speed (on APS-C cameras)

In terms of FoV & DoF
Camera series [Crop factor] Focal length SpeedMax MR Dia. angle of view
Pentax K APS-C [1.53x] 153mm F/4.31.54:1 16.1°

Manufacturer description #1

GOLDEN, COLORADO (December 9, 2009)…PENTAX Imaging Company has announced the smc PENTAX D FA MACRO 100mm F2.8 WR lens designed for use with PENTAX digital SLR cameras. Combining a high-quality exterior finish with PENTAX-original weather-resistant construction, this new macro lens is especially useful for the demands of outdoor photography.

This PENTAX macro lens features a high-grade, aluminum barrel with the high-quality, exclusive exterior design and finish unique to the PENTAX D FA series lenses. Further, the entire mechanism of the focus ring has been reviewed and upgraded to assure flawless manual-focus operation. For improved performance, the PENTAX D FA MACRO 100mm F2.8 WR is the first PENTAX interchangeable macro lens featuring a completely rounded diaphragm blade to create a natural, beautiful bokeh at wide apertures, while minimizing the streaking effect of point light sources.

PENTAX WR lenses feature simplified weather-resistant construction to repel water and moisture. Combined with a PENTAX weather-resistant K-7, K20D, K200D or K10D digital SLR camera body, the lens performs well in damp, inclement outdoor conditions including rain, mist, water spray and splashes.

The lens also features the PENTAX-original SP (Super Protect) surface coating to repel dust, water and grease and to minimize fingerprints.

Other significant features of this latest WR lens include:

  • Mounted on a PENTAX digital SLR camera body, this lens offers a focal length equivalent to 153mm in the 35mm format for high-quality, true-to-life images, while minimizing flare and ghost images. The maximum life-size magnification allows photographers to capture dramatic close-up images with great ease.
  • A working distance of just over five inches (13 cm) facilitates close-up photography of subjects including flora, insects, and wildlife.
  • The PENTAX-developed Quick-Shift Focus System for instant switching to manual-focus operation after the subject is captured in focus by the camera’s AF system.
  • An image circle to accommodate 35mm film-format camera image size.
  • Compatibility with the macro adapter included in the PENTAX AF160FC dedicated Auto Macro Ring Flash.

Manufacturer description #2

This telephoto lens with ultra-close focusing capabilities is a multi-talented player, delivering clear, high-contrast images from both telephoto and macro perspectives. It is ideal for the close- up photographer looking for full-size subject magnification and outstanding depth of field control for the smallest of subjects. This lens has the same outstanding characteristics as its 50mm sister model, and has managed to minimize the weight and size when compared to other macro lenses. This lens also produces a 1:1 magnification ratio and features the unique PENTAX FREE technology; ensuring exceptional focusing distance to infinity by effectively reducing annoying aberrations at any focusing distance.

With 150mm focal length in the 35mm format, the photographer enjoys the comfort and safety of a greater working distance to the subject, making it ideal for photographing insects, for example. The D FA 100mm has, like its sister model, a switch that locks the focus setting, making it impossible to inadvertently change the focus while concentrating on getting the perfect shot. This lens is equipped with protective seals and is resistant to humidity

Manufacturer description #3

High-quality macro lens using simple drip-proof construction. This lens enables 1:1 (1X) photography at distances up to 13cm from the lens to the subject. The refined aluminum alloy body has a simple drip-proof construction and is built with a compact, lightweight design without an iris ring. This reduces ghosting and flare for enabling superior imaging performance for sharp images with high contrast at all shooting distances. A round iris diaphragm is used for rendering natural out-of-focus (bokeh) background effect.

New sleek machined aluminum outer casing is used for a refined lens appearance. *The focus mechanism has been completely revised for enabling smooth focusing when using the manual focus and a comfortable sense of operation.

This lens uses a simple drip-proof construction for preventing water from getting inside the lens. Combined with PENTAX digital SLR cameras also using a drip-proof construction enables use in rainy or foggy conditions, or other locations exposed to water for enhanced durability and reliability.

This lens has a focal length equivalent to 153mm in the 35mm film format.

The FREE (fixed rear element extension) focusing system is used to minimize ghosting and flare and provide clear, high-quality images from the infinity end to macro distances. Closeups up to a maximum of 1:1 (1X) are possible. The working distance is longer than the macro of 50mm for enabling effective shooting of subjects that are difficult to approach.

A new round iris diaphragm is used from open to F5.6. This reduces the beams of light when shooting point light sources for enabling a more natural out-of-focus (bokeh) effect.

A SP (super protect) coating is used on the front lens for repelling water and oils to enable shooting with peace of mind even in outdoor environments.

If you turn the focus ring after focusing by the AF, focusing instantly switches to the manual focus. This enables smooth focusing operations without the need for a switching operation.

From the editor

Version of the smc Pentax-D FA 100mm F/2.8 Macro lens which has a new chipped-aluminum water-resistant barrel and Super Protect coating, but lacks the aperture ring and CLAMP switch. The overall build quality is so high that the lens actually deserves the Limited designation. The entire mechanism of the focusing ring was reviewed and upgraded. The angle of rotation of the ring is now about 270 degrees which is more than enough to perform very precise manual focusing. Focus limiter is still missing, though.

Typical application

Class:

Fast full-frame macro lens • Professional modelTravellers' choice

Professional model

  • Combination of focal length and closest focusing distance meets professional demands
  • Water-resistant barrel
  • Compatible with teleconverters

Travellers' choice

  • Lightweight
  • Water-resistant barrel
  • Super Protect (SP) coating

Missing features (2):

Built-in autofocus motor [LOW PRIORITY] • Focusing distance range limiter

Genres or subjects of photography (4):

Macrophotography • Product photography • Portraits • Travel photography

Recommended slowest shutter speed when shooting static subjects handheld:

1/100th of a second

Alternatives in the Pentax K system

///// Sorted by focal length and speed, in ascending order /////

Lenses with similar focal length

///// Sorted by manufacturer name /////

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Pros and cons
Instruction manual
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Pentax-D FA series lenses (17)
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Pentax-D FA series lenses

The smc Pentax-D FA lenses are interchangeable lenses for Pentax SLR cameras. Their image circle covers the 35mm film format, and they also obtain optimum image clarity with Pentax digital SLR cameras. When these lenses are used with an *istD-series or newer digital SLR cameras, the Quick-Shift Focus System enables manual touch-up focusing after autofocus is achieved.

The smc Pentax-D FA lens mount is called the KAF-mount. This lens mount enables autofocus and autoexposure.

Copyright © 2012-2022 Evgenii Artemov. All rights reserved. Translation and/or reproduction of website materials in any form, including the Internet, is prohibited without the express written permission of the website owner.

35mm full frame

43.27 24 36
  • Dimensions: 36 × 24mm
  • Aspect ratio: 3:2
  • Diagonal: 43.27mm
  • Area: 864mm2

In-camera motor

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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.

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 can also be different.

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

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.

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.

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.

The basic mechanism of the floating element system is also incorporated into the internal and rear focusing methods.

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.

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.

Fixed diaphragm

The aperture setting is fixed at F/2.8 on this lens, and cannot be adjusted.

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.

Teleconverters

Teleconverters increase the effective focal length of lenses. They also usually maintain the closest focusing distance of lenses, thus increasing the magnification significantly. A lens combined with a teleconverter is normally smaller, lighter and cheaper than a "direct" telephoto lens of the same focal length and speed.

Teleconverters are a convenient way of enhancing telephoto capability, but it comes at a cost − reduced maximum aperture. Also, since teleconverters magnify every detail in the image, they logically also magnify residual aberrations of the lens.

Lens caps

Scratched lens surfaces can spoil the definition and contrast of even the finest lenses. Lens covers are the best and most inexpensive protection available against dust, moisture and abrasion. Safeguard lens elements - both front and rear - whenever the lens is not in use.