HD Pentax-FA 31mm F1.8 Ltd is a Fixed aperture Auto Focus (AF)
Wideangle Prime lens with 35mm FF max sensor coverage, and it is designed to be used with Pentax KAF mount cameras.
What type of photography is the HD Pentax-FA 31mm F1.8 Ltd lens good for?
The type of photography that you are planning to use the HD Pentax-FA 31mm F1.8 Ltd 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 HD Pentax-FA 31mm F1.8 Limited Lens
Here, we've included a summary of the advantages and disadvantages of the HD Pentax-FA 31mm F1.8 Limited lens in a list form to help you determine whether it offers the features you need.
| Autofocus |
| Aperture Ring |
| Distance Scale |
| DoF(Depth of Field) Scale |
| Hood supplied |
| Fast Aperture |
| Covers Full-Frame Sensor |
| 9 Diaphragm Blades |
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Buy HD Pentax-FA 31mm F1.8 Ltd from Amazon or B&H PHOTO
| No Weather Sealing |
| Pricey |
Lens Mount
HD Pentax-FA 31mm F1.8 Ltd 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 K-1 II.
Size, Weight and Filter Thread
Size and weight is a very important decision factor when searching for your next lens. HD Pentax-FA 31mm F1.8 Ltd has a maximum diameter of 65mm and total length of 69mm. It weighs 341g / 12.0 oz.
HD Pentax-FA 31mm F1.8 Ltd has a filter thread of 58mm.
Focal Range
HD Pentax-FA 31mm F1.8 Ltd has a fixed focal lenght of 31mm. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 46.5mm.
Maximum Magnification Ratio
HD Pentax-FA 31mm F1.8 Ltd has a Max Magnification Ratio of 0.16x and has a minimum focusing distance of 0.3m. 0.16x means that the max magnification ratio is very low and not suitable even for modest close-up shots.
Aperture
HD Pentax-FA 31mm F1.8 Ltd has a max aperture of F1.8 and a minimum aperture of F22.
Optical Formula
HD Pentax-FA 31mm F1.8 Ltd's optical formula consists of 9 elements in 7 groups . Following special elements are used in this design:
- HD
- Super Protect coatings
Lens Hood
HD Pentax-FA 31mm F1.8 Ltd comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.
Body Colour
HD Pentax-FA 31mm F1.8 Ltd is available in Black and silver color.
Popular Comparisons of HD Pentax-FA 31mm F1.8 Ltd
Here is the eight most popular comparisons of HD Pentax-FA 31mm F1.8 Ltd amongst Camera Decision readers.