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Pentax smc DA 40mm F2.8 Limited KAF Mount Review

Pentax smc DA 40mm F2.8 Limited

Main Features

  • 40mm Focal Range
  • F2.8 Max Aperture
  • Filter Thread: 49mm
  • Max Format: APS-C / DX
  • Pentax KAF Mount
  • Weight: 90g / 0.20 lb
  • Dimensions(øxL): 63mm x 15mm
  • Min Focus Distance: 0.4m
  • Max Magnification: 0.13x
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Pentax 40mm F2.8 L Overview


Pentax 40mm F2.8 L is a Fixed aperture Auto Focus (AF) Standard Prime lens with APS-C / DX max sensor coverage, and it is designed to be used with KAF Mount cameras.

What type of photography is the Pentax 40mm F2.8 L lens good for?

The type of photography that you are planning to use the Pentax 40mm F2.8 L is an important decision factor. Here we have evaluated its suitability to various photography scenarios:

Photography Type Suitability
Bird/WildlifeFair
SportsFair
PortraitVery Good
TravelAverage
StreetGood
WeddingVery Good
Walk AroundAverage
VloggingAverage
LandscapeAverage
MacroPoor

Lenses in Pentax KAF Mount with Same Focal and Aperture Range
Model Coverage Weight Focusing Street Price
HD Pentax DA 40mm F2.8 Limited Lens HD Pentax DA 40mm F2.8 Limited
Compare
APS-C / DX 80gr AF Amazon B&H Photo
Pentax smc DA 40mm F2.8 XS Lens Lens Pentax smc DA 40mm F2.8 XS Lens
Compare
APS-C / DX 45gr AF Amazon B&H Photo

Reasons to Buy Pentax smc DA 40mm F2.8 Limited Lens

Here we've included a summary of the advantages and disadvantages of the Pentax smc DA 40mm F2.8 Limited lens in a list form to help you determine whether it offers the features you need.

PROs
Autofocus
Distance Scale
Hood supplied
Full-time Manual Focusing
9 Diaphragm Blades for Smooth Bokeh
Light weight at only 90g / 3.2 oz
Report a correction

Buy Pentax 40mm F2.8 L from Amazon or B&H PHOTO


CONs

We couldn't find any significant Cons for the Pentax smc DA 40mm F2.8 Limited



Lens Mount

Pentax 40mm F2.8 L is compatible with cameras that have a Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III.

Pentax 40mm F2.8 L is also available in Pentax KAF mount.

Size, Weight and Filter Thread

Size and weight is a very important decision factor when searching for your next lens. Pentax 40mm F2.8 L has a maximum diameter of 63mm and total length of 15mm. It weighs 90g / 3.2 oz.

Pentax 40mm F2.8 L has a filter thread of 49mm. Below are links to the filters that we recommend you to consider for your Pentax 40mm F2.8 L:

  • 49mm Variable ND Lens Filters
  • 49mm Circular Polarizer Lens Filters
  • 49mm Clear Protection Lens Filters




Focal Range

Pentax 40mm F2.8 L has a fixed focal length of 40mm which has a 35mm equivalent focal range of 60mm when used on a APS-C / DX format camera.


Optical Image Stabilization

Pentax 40mm F2.8 L doesn't have an optical image stabilization system so the only option to stabilize the image taken with this lens is to mount on a camera body with IBIS (sensor based In-body image stabilization).

Maximum Magnification Ratio

Pentax 40mm F2.8 L has a Max Magnification Ratio of 0.13x and has a minimum focusing distance of 0.4m. 0.13x means that the max magnification ratio is very low and not suitable even for modest close-up shots.

Below are the 3 Standard Prime type Pentax KAF mount lens alternatives with highest max magnification ratios:

  • Pentax 35mm F2.4 AL: 0.17x - (Compare)
  • Pentax DA 55mm F1.4 SDM: 0.17x - (Compare)
  • HD Pentax-FA 35mm F2 AL: 0.17x - (Compare)

Aperture

Pentax 40mm F2.8 L has a max aperture of F2.8 and a minimum aperture of F22.0.

Optical Formula

Pentax 40mm F2.8 L's optical formula consists of 5 elements in 4 groups .

Lens Hood

Pentax 40mm F2.8 L comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.

Body Colour

Pentax 40mm F2.8 L is available in Black color.

Popular Comparisons of Pentax 40mm F2.8 L

Here are the eight most popular comparisons of the Pentax 40mm F2.8 L amongst Camera Decision readers.

Top Alternatives of Pentax 40mm F2.8 L Lens
Model Coverage Weight Focusing Street Price
HD Pentax DA 35mm F2.8 Macro Limited Lens HD Pentax DA 35mm F2.8 Macro Limited
Compare
APS-C / DX 214 g / 0.47 lb AF Amazon B&H Photo
HD Pentax DA 40mm F2.8 Limited Lens HD Pentax DA 40mm F2.8 Limited
Compare
APS-C / DX 80 g / 0.18 lb AF Amazon B&H Photo
Voigtlander 40mm F2 Ultron SL II Lens Voigtlander 40mm F2 Ultron SL II
Compare
35mm FF 200 g / 0.44 lb MF Amazon B&H Photo
Pentax smc DA 50mm F1.8 Lens Pentax smc DA 50mm F1.8
Compare
35mm FF 122 g / 0.27 lb AF Amazon B&H Photo
Pentax smc FA 43mm F1.9 Limited Lens Pentax smc FA 43mm F1.9 Limited
Compare
35mm FF 155 g / 0.34 lb AF Amazon B&H Photo
Pentax smc DA 40mm F2.8 XS Lens Lens Pentax smc DA 40mm F2.8 XS Lens
Compare
APS-C / DX 45 g / 0.10 lb AF Amazon B&H Photo
HD Pentax-FA 35mm F2 AL Lens HD Pentax-FA 35mm F2 AL
Compare
APS-C / DX 193 g / 0.42 lb AF Amazon B&H Photo
Pentax smc FA 50mm F1.4 Lens Pentax smc FA 50mm F1.4
Compare
35mm FF 220 g / 0.48 lb AF Amazon B&H Photo


**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate, I earn from qualifying purchases.

Pentax smc DA 40mm F2.8 Limited Alternatives in Pentax KAF Mount
Model Coverage Weight Focusing Street Price
HD Pentax-D FA 50mm F1.4 SDM AW Lens HD Pentax-D FA 50mm F1.4 SDM AW
Compare
35mm FF 910 g / 2.00 lb AF Amazon B&H Photo
smc Pentax-FA 50mm F1.4 Classic Lens smc Pentax-FA 50mm F1.4 Classic
Compare
35mm FF 216 g / 0.48 lb AF Amazon B&H Photo
HD Pentax-FA 50mm F1.4 Lens HD Pentax-FA 50mm F1.4
Compare
35mm FF 223 g / 0.49 lb AF Amazon B&H Photo
HD Pentax-FA 43mm F1.9 Limited Lens HD Pentax-FA 43mm F1.9 Limited
Compare
35mm FF 155 g / 0.34 lb AF Amazon B&H Photo
HD Pentax-FA 31mm F1.8 Limited Lens HD Pentax-FA 31mm F1.8 Limited
Compare
35mm FF 341 g / 0.75 lb AF Amazon B&H Photo
Pentax smc D-FA 50mm F2.8 Macro Lens Pentax smc D-FA 50mm F2.8 Macro
Compare
35mm FF 265 g / 0.58 lb AF Amazon B&H Photo
HD Pentax DA 35mm F2.8 Macro Limited Lens HD Pentax DA 35mm F2.8 Macro Limited
Compare
APS-C / DX 214 g / 0.47 lb AF Amazon B&H Photo
HD Pentax DA 40mm F2.8 Limited Lens HD Pentax DA 40mm F2.8 Limited
Compare
APS-C / DX 80 g / 0.18 lb AF Amazon B&H Photo
Pentax smc DA 35mm F2.4 AL Lens Pentax smc DA 35mm F2.4 AL
Compare
APS-C / DX 124 g / 0.27 lb AF Amazon B&H Photo
Pentax smc DA 35mm F2.8 Macro Limited Lens Pentax smc DA 35mm F2.8 Macro Limited
Compare
APS-C / DX 215 g / 0.47 lb AF Amazon B&H Photo
Pentax smc DA 40mm F2.8 XS Lens Lens Pentax smc DA 40mm F2.8 XS Lens
Compare
APS-C / DX 45 g / 0.10 lb AF Amazon B&H Photo
Pentax smc DA 50mm F1.8 Lens Pentax smc DA 50mm F1.8
Compare
35mm FF 122 g / 0.27 lb AF Amazon B&H Photo
Pentax smc DA 55mm F1.4 SDM Lens Pentax smc DA 55mm F1.4 SDM
Compare
APS-C / DX 375 g / 0.83 lb AF Amazon B&H Photo
Pentax smc FA 31mm F1.8 AL Limited Lens Pentax smc FA 31mm F1.8 AL Limited
Compare
35mm FF 345 g / 0.76 lb AF Amazon B&H Photo
Pentax smc FA 43mm F1.9 Limited Lens Pentax smc FA 43mm F1.9 Limited
Compare
35mm FF 155 g / 0.34 lb AF Amazon B&H Photo
Pentax smc FA 50mm F1.4 Lens Pentax smc FA 50mm F1.4
Compare
35mm FF 220 g / 0.48 lb AF Amazon B&H Photo
HD Pentax-FA 35mm F2 AL Lens HD Pentax-FA 35mm F2 AL
Compare
APS-C / DX 193 g / 0.42 lb AF Amazon B&H Photo
Samsung D-Xenon 35mm F2 AL Lens Samsung D-Xenon 35mm F2 AL
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35mm FF 195 g / 0.43 lb AF Amazon B&H Photo
Samyang 50mm F1.4 AS UMC Lens Samyang 50mm F1.4 AS UMC
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35mm FF 535 g / 1.18 lb MF Amazon B&H Photo
Sigma 50mm F2.8 EX DG Macro Lens Sigma 50mm F2.8 EX DG Macro
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35mm FF 320 g / 0.70 lb AF Amazon B&H Photo
Samyang 35mm F1.4 AS UMC Lens Samyang 35mm F1.4 AS UMC
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35mm FF 660 g / 1.45 lb MF Amazon B&H Photo
Voigtlander 40mm F2 Ultron SL II Lens Voigtlander 40mm F2 Ultron SL II
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35mm FF 200 g / 0.44 lb MF Amazon B&H Photo
Schneider PC-Super-Angulon 28mm f2.8 Lens Schneider PC-Super-Angulon 28mm f2.8
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35mm FF 565 g / 1.24 lb MF Amazon B&H Photo
Schneider PC-TS Super-Angulon 2.850 HM Lens Schneider PC-TS Super-Angulon 2.850 HM
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35mm FF 1400 g / 3.08 lb MF Amazon B&H Photo
Irix 45mm F1.4 Lens Irix 45mm F1.4
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35mm FF 925 g / 2.04 lb MF Amazon B&H Photo
Lensbaby Burnside 35 Lens Lensbaby Burnside 35
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35mm FF 374 g / 0.82 lb MF Amazon B&H Photo
Carl Zeiss Distagon T 228 Lens Carl Zeiss Distagon T 228
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35mm FF 520 g / 1.14 lb MF Amazon B&H Photo
Carl Zeiss Distagon T 235 Lens Carl Zeiss Distagon T 235
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35mm FF 570 g / 1.25 lb MF Amazon B&H Photo
Carl Zeiss Makro-Planar T 250 Lens Carl Zeiss Makro-Planar T 250
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35mm FF 530 g / 1.17 lb MF Amazon B&H Photo
Carl Zeiss Planar T1.4 50 Lens Carl Zeiss Planar T1.4 50
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35mm FF 350 g / 0.77 lb MF Amazon B&H Photo
Lensbaby Velvet 56 Lens Lensbaby Velvet 56
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35mm FF 400 g / 0.88 lb MF Amazon B&H Photo
Hartblei Superrotator 40mm F4 IF TS Lens Hartblei Superrotator 40mm F4 IF TS
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35mm FF 1550 g / 3.41 lb MF Amazon B&H Photo
Sigma 28mm F1.8 EX DG Aspherical Macro Lens Sigma 28mm F1.8 EX DG Aspherical Macro
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35mm FF 500 g / 1.10 lb AF Amazon B&H Photo
Lensbaby Sol 45 DSLR Lens Lensbaby Sol 45 DSLR
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35mm FF 144 g / 0.32 lb MF Amazon B&H Photo
Rokinon 35mm f1.4 Lens Rokinon 35mm f1.4
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35mm FF 660 g / 1.45 lb MF Amazon B&H Photo
Sigma 30mm F1.4 EX DC HSM Lens Sigma 30mm F1.4 EX DC HSM
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APS-C / DX 430 g / 0.95 lb AF Amazon B&H Photo
Sigma 35mm F1.4 DG HSM Lens Sigma 35mm F1.4 DG HSM
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35mm FF 665 g / 1.46 lb AF Amazon B&H Photo
Sigma 50mm F1.4 EX DG HSM Lens Sigma 50mm F1.4 EX DG HSM
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35mm FF 505 g / 1.11 lb AF Amazon B&H Photo

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Pentax 40mm F2.8 L Detailed Specifications


General
Brand Pentax
Lens Type Prime
Lens Type Standard Prime
Lens Mount Pentax KAF
Max Format APS-C / DX
Focal Range 40mm
Image Stabilization No
Colour Black
Zoom Method No Zoom
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 1.0X
APERTURE
Max Aperture F2.8
Min Aperture F22.0
Aperture Ring No
Diaphragm Blades 9
Optics
Optical Elements 5
Optical Groups 4

FOCUSING
Min Focus Distance 0.4m
Max Magnification 0.13X
Autofocus Yes
AF Motor Type Screw drive from camera
Full Time Manual Yes
Focus Method Unknown
Distance Scale Yes
PHYSICAL SPECS
Weight 90g
Diameter 63mm
Length 15mm
Weather Sealing Unknown
Filter Thread 49mm
Filter Notes -
Hood Supplied Yes
Tripod Collar No
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Frequently Asked Questions about Pentax smc DA 40mm F2.8 Limited
is the Pentax smc DA 40mm F2.8 Limited a Weather-sealed lens?
What is the Minimum Focusing Distance of Pentax smc DA 40mm F2.8 Limited
is the Pentax smc DA 40mm F2.8 Limited an Autofocus (AF) lens?
What is the Filter Thread Size of Pentax smc DA 40mm F2.8 Limited
Does Pentax smc DA 40mm F2.8 Limited have Image Stabilization?
Does Pentax smc DA 40mm F2.8 Limited have Aperture Ring?
What is the Maximum Magnification Ratio of Pentax smc DA 40mm F2.8 Limited


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