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Pentax smc DA 21mm F3.2 AL Limited Review

Pentax smc DA 21mm F3.2 AL Limited

Main Features

  • 21mm Focal Range
  • F3.2 Max Aperture
  • Filter Thread: 49mm
  • Max Format: APS-C / DX
  • Pentax KAF Mount
  • Weight: 140g.
  • Diameter: 63mm
  • Length: 25mm
  • Min Focus Distance:0.2m
  • Max Magnification:0.17x
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Pentax 21mm F3.2 AL L Overview

Pentax 21mm F3.2 AL L is a Fixed aperture Auto Focus (AF) Wideangle Prime lens with APS-C / DX max sensor coverage, and it is designed to be used with Pentax KAF mount cameras.

What type of photography is the Pentax 21mm F3.2 AL L lens good for?

The type of photography that you are planning to use the Pentax 21mm F3.2 AL L is an important decision factor. Here we have evaluated its suitability to various photography scenarios:

Photography Type Suitability
Bird/WildlifePoor
SportsPoor
PortraitAverage
TravelAverage
StreetExcellent
WeddingAverage
Walk AroundAverage
VloggingGood
LandscapeVery Good
MacroPoor

Lenses in Pentax KAF Mount with Same Focal and Aperture Range
Model Coverage Weight Focusing Street Price
HD Pentax DA 21mm F3.2 AL Limited Lens HD Pentax DA 21mm F3.2 AL Limited
Compare
APS-C / DX 134gr AF Amazon B&H Photo

Reasons to Buy Pentax smc DA 21mm F3.2 AL Limited Lens

Here we've included a summary of the advantages and disadvantages of the Pentax smc DA 21mm F3.2 AL Limited lens in a list form to help you determine whether it offers the features you need.

PROs
Autofocus
Hood supplied
Full-time Manual Focusing
Minimum focus distance of 0.2m / 7.9 inch
Light weight at only 140g / 4.9 oz
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Buy Pentax 21mm F3.2 AL L from Amazon or B&H PHOTO


CONs
Not so fast for a short Prime Lens


Lens Mount

Pentax 21mm F3.2 AL L is compatible with cameras that have Pentax KAF lens mount. Some of the latest released cameras that are compatible with the Pentax KAF lenses are Pentax KF, Pentax K-3 III and Pentax KP.

Pentax 21mm F3.2 AL 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 21mm F3.2 AL L has a maximum diameter of 63mm and total length of 25mm. It weighs 140g / 4.9 oz.

Pentax 21mm F3.2 AL L has a filter thread of 49mm. Below are links to the filters that we recommend you to consider for your Pentax 21mm F3.2 AL L:

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

Focal Range

Pentax 21mm F3.2 AL L has a fixed focal length of 21mm which has a 35mm equivalent focal range of 31.5mm when used on a APS-C / DX format camera.

Optical Image Stabilization

Pentax 21mm F3.2 AL 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 21mm F3.2 AL L has a Max Magnification Ratio of 0.17x and has a minimum focusing distance of 0.2m. 0.17x means that the max magnification ratio is very low and not suitable even for modest close-up shots.

Aperture

Pentax 21mm F3.2 AL L has a max aperture of F3.2 and a minimum aperture of F22.0.

Optical Formula

Pentax 21mm F3.2 AL L's optical formula consists of 8 elements in 5 groups .

Lens Hood

Pentax 21mm F3.2 AL L comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.

Body Colour

Pentax 21mm F3.2 AL L is available in Black color.

Popular Comparisons of Pentax 21mm F3.2 AL L

Here is the eight most popular comparisons of Pentax 21mm F3.2 AL L amongst Camera Decision readers.

Top Alternatives of Pentax 21mm F3.2 AL L Lens
Model Coverage Weight Focusing Street Price
HD Pentax DA 21mm F3.2 AL Limited Lens HD Pentax DA 21mm F3.2 AL Limited
Compare
APS-C / DX 134gr AF Amazon B&H Photo
Voigtlander 20mm F3.5 Color Skopar SL II Lens Voigtlander 20mm F3.5 Color Skopar SL II
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35mm FF 205gr MF Amazon B&H Photo
Samyang 20mm F1.8 ED AS UMC Lens Samyang 20mm F1.8 ED AS UMC
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35mm FF 497gr MF Amazon B&H Photo
Samyang 24mm f1.4 ED AS UMC Lens Samyang 24mm f1.4 ED AS UMC
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35mm FF 580gr MF Amazon B&H Photo
Rokinon 24mm f1.4 Aspherical Lens Rokinon 24mm f1.4 Aspherical
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35mm FF 580gr MF Amazon B&H Photo
Sigma 20mm F1.8 EX DG Aspherical RF Lens Sigma 20mm F1.8 EX DG Aspherical RF
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35mm FF 520gr AF Amazon B&H Photo
Sigma 24mm F1.8 EX DG Aspherical Macro Lens Sigma 24mm F1.8 EX DG Aspherical Macro
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35mm FF 485gr AF Amazon B&H Photo
Carl Zeiss Distagon T 2,825 Lens Carl Zeiss Distagon T 2,825
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35mm FF 480gr MF Amazon B&H Photo

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**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 21mm F3.2 AL Limited Alternatives in Pentax KAF Mount
Model Coverage Weight Focusing Street Price
HD Pentax DA 21mm F3.2 AL Limited Lens HD Pentax DA 21mm F3.2 AL Limited
Compare
APS-C / DX 134gr AF Amazon B&H Photo
Voigtlander 20mm F3.5 Color Skopar SL II Lens Voigtlander 20mm F3.5 Color Skopar SL II
Compare
35mm FF 205gr MF Amazon B&H Photo
Samyang 24mm f1.4 ED AS UMC Lens Samyang 24mm f1.4 ED AS UMC
Compare
35mm FF 580gr MF Amazon B&H Photo
Samyang T-S 24mm f3.5 ED AS UMC Lens Samyang T-S 24mm f3.5 ED AS UMC
Compare
35mm FF 680gr MF Amazon B&H Photo
Carl Zeiss Distagon T 2,821 Lens Carl Zeiss Distagon T 2,821
Compare
35mm FF 600gr MF Amazon B&H Photo
Carl Zeiss Distagon T 2,825 Lens Carl Zeiss Distagon T 2,825
Compare
35mm FF 480gr MF Amazon B&H Photo
Carl Zeiss Distagon T 3,518 Lens Carl Zeiss Distagon T 3,518
Compare
35mm FF 470gr MF Amazon B&H Photo
Sigma 20mm F1.8 EX DG Aspherical RF Lens Sigma 20mm F1.8 EX DG Aspherical RF
Compare
35mm FF 520gr AF Amazon B&H Photo
Sigma 24mm F1.8 EX DG Aspherical Macro Lens Sigma 24mm F1.8 EX DG Aspherical Macro
Compare
35mm FF 485gr AF Amazon B&H Photo
Rokinon 24mm f1.4 Aspherical Lens Rokinon 24mm f1.4 Aspherical
Compare
35mm FF 580gr MF Amazon B&H Photo
Venus Laowa 25mm F2.8 2.5-5X Ultra Macro Lens Venus Laowa 25mm F2.8 2.5-5X Ultra Macro
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35mm FF 400gr MF Amazon B&H Photo
Samyang 20mm F1.8 ED AS UMC Lens Samyang 20mm F1.8 ED AS UMC
Compare
35mm FF 497gr MF Amazon B&H Photo

Pentax 21mm F3.2 AL L Detailed Specifications


General
Brand Pentax
Lens Type Prime
Lens Type Wideangle Prime
Lens Mount Pentax KAF
Max Format APS-C / DX
Focal Range 21mm
Image Stabilization No
Colour Black
Zoom Method No Zoom
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 1.0X
APERTURE
Max Aperture F3.2
Min Aperture F22.0
Aperture Ring No
Diaphragm Blades 7
Optics
Optical Elements 8
Optical Groups 5

FOCUSING
Min Focus Distance 0.2m
Max Magnification 0.17X
Autofocus Yes
AF Motor Type Screw drive from camera
Full Time Manual Yes
Focus Method Unknown
PHYSICAL SPECS
Weight 140g
Diameter 63mm
Length 25mm
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 21mm F3.2 AL Limited
is the Pentax smc DA 21mm F3.2 AL Limited a Weather Sealed lens?
What is the Minimum Focusing Distance of Pentax smc DA 21mm F3.2 AL Limited
is the Pentax smc DA 21mm F3.2 AL Limited an Autofocus (AF) lens?
What is the Filter Thread Size of Pentax smc DA 21mm F3.2 AL Limited
Does Pentax smc DA 21mm F3.2 AL Limited have Image Stabilization?
Does Pentax smc DA 21mm F3.2 AL Limited have Aperture Ring?
What is the Maximum Magnification Ratio of Pentax smc DA 21mm F3.2 AL Limited


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