HD Pentax-D FA 100mm F/2.8 ED AW Macro

Macro lens • Pro • Digital era

Abbreviations

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.
D FA Autofocus lens which is optimized for Pentax digital SLR cameras but can be also used on Pentax film SLR cameras.
ED The lens incorporates low dispersion elements.
AW Dust-proof and water-resistant lens.
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

Production details

Announced:October 2022
Production type:Mass production
Production status: In production
Original name:HD PENTAX-D FA MACRO 1:2.8 100mm ED AW
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
1
ED
2
AD
F.E.
8 blades
Macro 1:1
Body AF
QFS
DP/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:10 elements - 8 groups
1 ED, 2 AD
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:348g
Maximum diameter x Length:⌀65×80.5mm
Weather sealing:Dust-proof and 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

PARSIPPANY, N.J., Oct. 19, 2022 /PRNewswire/ -- Ricoh Imaging Americas Corporation today announced the HD PENTAX-D FA MACRO 100mm F2.8ED AW lens—the first PENTAX macro lens to feature All Weather (AW) dustproof, weather-resistant construction. Incorporating a new optical design developed using the latest optical design technologies, the lens optimizes image resolution and contrast, even at open aperture, and delivers clear, high-quality images.

When mounted on a dustproof, weather-resistant PENTAX digital SLR camera body, the new HD PENTAX-D FA MACRO 100mm F2.8ED AW lens creates a highly dependable, durable imaging system that performs superbly in demanding shooting conditions — such as snow, mist, rain, or in locations prone to splashing or spraying water.

Despite the new optical design and AW construction, the new lens is nearly as compact as its predecessor (the smc PENTAX-D FA MACRO 100mm F2.8 WR). It features a new exterior design and incorporates the PENTAX-original Quick-Shift Focus System, enabling the photographer to instantly shift the focus mode from auto to manual after the subject has been captured in focus by the camera's autofocus system.

In addition to the standard black model, the HD PENTAX-D FA MACRO 100mm F2.8ED AW lens will also be available in a special-edition silver model — limited to just 300 units worldwide.

| Main features of the HD PENTAX-D FA MACRO 100mmF2.8ED AW |

1. Exceptional imaging performance made possible by the latest optical design technologies

The lens incorporates one ED (Extra-low Dispersion) glass optical element and two Anomalous Dispersion glass optical elements to compensate for various aberrations and minimize the generation of the unwanted purple fringe effect. This is coupled with the high-grade, multi-layer HD (High Definition) Coating, which significantly reduces average reflectance in the visible ray spectrum to less than 50% compared to conventional models, and the innovative FREE (Fixed Rear Element Extension) focusing system. All together, these technologies effectively reduce the generation of flare and ghost images over the entire focus range — from minimum focusing distance to infinity — and deliver clear, high-quality images. The lens also provides life-size magnification in close-range shooting to capture dramatic, fine-detailed close-up images.

2. Dustproof, weather-resistant AW construction for exceptional outdoor shooting reliability

Ready for adverse weather conditions, the lens features dustproof, weather-resistant AW (All Weather) construction for the first time in a PENTAX macro lens. This dependable construction prevents the intrusion of dust and moisture into the lens body, using six sealing parts to optimize airtight performance. When mounted on a dustproof, weather-resistant PENTAX digital SLR camera body, it creates a highly dependable, durable imaging system that performs superbly in demanding shooting conditions — such as snow, mist, rain, or in locations prone to splashing or spraying water.

3. Exclusive exterior design and outstanding operability

The lens has an attractive, stylish appearance, with metallic exterior parts meticulously machined from high-grade aluminum. Its focus ring features the PENTAX-original Quick-Shift Focus System, which allows the photographer to instantly shift the focus mode from auto to manual after the subject has been captured in focus by the camera's autofocus system. This single-action operation assures a smooth, comfortable focus-mode switching maneuver during manual-focus shooting for dramatically improved operability.

4. Compact, lightweight design for superb maneuverability

Despite the improved imaging power made possible by the new optical design and outstanding AW construction, the lens is nearly as compact and lightweight as the smc PENTAX-D FA MACRO 100mm F2.8 WR (launched in December 2009), with outstanding weight distribution, ergonomics and maneuverability.

5. Other features

  • A working distance of 5.1 inches (13 centimeters), at life-size magnification, to facilitate the shooting of typically uncooperative subjects, such as insects
  • Individual serial number assigned to each lens: black model starts at 0000001, the silver model starts at 1000001
  • Circular diaphragm to produce a natural, beautiful bokeh (defocus) effect from open aperture to F5.6, while minimizing the streaking effect of point light sources
  • SP(Super Protect)Coating applied to the front optical element to keep the front surface free of dust or stains

From the editor

Ricoh claims that the lens has a new optical design, however if you compare the optical formulas of the HD D FA 100/2.8 ED AW Macro (2022) and the smc D FA 100/2.8 WR Macro (2009), you will see that the new lens is actually based on the 2009 design where the second element was replaced with a doublet, plus one element became ED and the other two became AD elements to eliminate lateral chromatic aberration (so called purple fringing), a big problem with the 2009 design. It took Ricoh a whole 13 years to fix this.

Having slightly changed the optical design, Ricoh decided not to change the mechanics: the lens still relies on the autofocus motor built into the camera, and there is still no focusing distance range limiter, which is somewhat disappointing, since the rotation angle of the focusing ring is about 270 degrees.

What's more, the lens is exactly the same size as the 2009 model and accepts the same 49mm screw-type filters, as well as the lens hood PH-RBE49.

For the Pentax system, the lens has excellent functionality, and using the camera's built-in motor for automatic focusing is not a significant drawback for a macro lens, since when shooting macro, experienced photographers still prefer to focus manually to get the desired result.

For those who already have the smc D FA 100/2.8 WR Macro (2009), it makes sense to upgrade if the purple fringing really annoys you and you need more serious dust and moisture protection.

Typical application

Class:

Fast full-frame macro lens • Professional modelTravellers' choice

Professional model

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

Travellers' choice

  • Lightweight
  • Dust-proof and 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

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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

Aspherical elements

Aspherical elements (ASPH, XA, XGM) are used in wide-angle lenses for correction of distortion and in large-aperture lenses for correction of spherical aberration, astigmatism and coma, thus ensuring excellent sharpness and contrast even at fully open aperture. The effect of the aspherical element is determined by its position within the optical formula: the more the aspherical element moves away from the aperture stop, the more it influences distortion; close to the aperture stop it can be particularly used to correct spherical aberration. Aspherical element can substitute one or several regular spherical elements to achieve similar or better optical results, which allows to develop more compact and lightweight lenses.

Use of aspherical elements has its downsides: it leads to non-uniform rendering of out-of-focus highlights. This effect usually appears as "onion-like" texture of concentric rings or "wooly-like" texture and is caused by very slight defects in the surface of aspherical element. It is difficult to predict such effect, but usually it occurs when the highlights are small enough and far enough out of focus.

Low dispersion elements

Low dispersion elements (ED, LD, SD, UD etc) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture. This type of glass exhibits low refractive index, low dispersion, and exceptional partial dispersion characteristics compared to standard optical glass. Two lenses made of low dispersion glass offer almost the same performance as one fluorite lens.

Low dispersion elements

Low dispersion elements (ED, LD, SD, UD etc) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture. This type of glass exhibits low refractive index, low dispersion, and exceptional partial dispersion characteristics compared to standard optical glass. Two lenses made of low dispersion glass offer almost the same performance as one fluorite lens.

Canon's Super UD, Nikon's Super ED, Pentax' Super ED, Sigma's FLD ("F" Low Dispersion), Sony' Super ED and Tamron's XLD glasses are the highest level low dispersion glasses available with extremely high light transmission. These optical glasses have a performance equal to fluorite glass.

High-refraction low-dispersion elements

High-refraction low-dispersion elements (HLD) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

High Index, High Dispersion elements

High Index, High Dispersion elements (HID) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

Anomalous partial dispersion elements

Anomalous partial dispersion elements (AD) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture.

Fluorite elements

Synthetic fluorite elements (FL) minimize chromatic aberrations and ensure excellent sharpness and contrast even at fully open aperture. Compared with optical glass, fluorite lenses have a considerably lower refraction index, low dispersion and extraordinary partial dispersion, and high transmission of infrared and ultraviolet light. They are also significantly lighter than optical glass.

According to Nikon, fluorite easily cracks and is sensitive to temperature changes that can adversely affect focusing by altering the lens' refractive index. To avoid this, Canon, as the manufacturer most widely using fluorite in its telephoto lenses, never uses fluorite in the front and rear lens elements, and the white coating is applied to the lens barrels to reflect light and prevent the lens from overheating.

Short-wavelength refractive elements

High and specialized-dispersion elements (SR) refract light with wavelengths shorter than that of blue to achieve highly precise chromatic aberration compensation. This technology also results in smaller and lighter lenses.

Blue Spectrum Refractive Optics

Organic Blue Spectrum Refractive Optics material (BR Optics) placed between convex and concave elements made from conventional optical glass provides more efficient correction of longitudinal chromatic aberrations in comparison with conventional technology.

Diffraction elements

Diffraction elements (DO, PF) cancel chromatic aberrations at various wavelengths. This technology results in smaller and lighter lenses in comparison with traditional designs with no compromise in image quality.

High refractive index elements

High refractive index elements (HR, HRI, XR etc) minimize field curvature and spherical aberration. High refractive index element can substitute one or several regular elements to achieve similar or better optical results, which allows to develop more compact and lightweight lenses.

Apodization element

Apodization element (APD) is in fact a radial gradient filter. It practically does not change the characteristics of light beam passing through its central part but absorbs the light at the periphery. It sort of softens the edges of the aperture making the transition from foreground to background zone very smooth and results in very attractive, natural looking and silky smooth bokeh.

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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.