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/Wildlife | Poor |
| Sports | Poor |
| Portrait | Average |
| Travel | Average |
| Street | Excellent |
| Wedding | Average |
| Walk Around | Average |
| Vlogging | Good |
| Landscape | Very Good |
| Macro | Poor |
Lenses in Pentax KAF Mount with Same Focal and Aperture Range
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.
| 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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| 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:
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
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