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Pentax FA 31mm F1.8 Limited Lens
Fixed focal-length. No zoom.
Rectilinear are normal lenses that show straight lines as straight lines.
Thread size in milimeters for screw-on filters.58
Quick-Shift Autofocus, also called Direct Manual-Focus (DMF).
Discontinued: No longer produced by the manufacturer. May still be in stock or found used.Lens Description
The Pentax FA 31mm F1.8 Limited is a wide prime designed for cameras with a Full-Frame sensor. This ultra-bright prime has a 31mm focal-length.
This prime lens focuses down to 30cm from the imaging plane, capturing subject with a maximum 0.16X magnification. The lens offers a Quick-Shift AF system which lets the user simply rotate the focus-ring to focus manually. While this lens is capable of AF, it does not have a built-in focus motor. It can only focus with a compatible camera body which features a mechanical AF-coupling.
The lens weighs 345g.
This lens is only available for the Pentax K mount. It directly attaches and is fully compatible with all Pentax K mount cameras with Full-Frame or smaller sensors.
Focal-Range
Angle-Of-View
Maximum Aperture
Viewing Angle Range
Maximum Aperture
Magnification
Weight
Pentax FA 31mm F1.8 Limited Specifications
| Brand | Pentax | Model | FA 31mm F1.8 Limited |
|---|---|---|---|
| Mount | Pentax K KAF | Max FLM | 1X |
| Focal Length | 31mm | View Angle | 70° |
| Max Aperture | F/1.8 | Min Aperture | F/22 |
| Min Focus | 30cm | Magnification | 0.16X |
| Filter Size | 58mm | Aperture Blades | 9 |
| Size (D x L) | 66 x 68.5mm | Weight | 345g |
| Tilt | N / A | Shift | N / A |
| Stabilization | Protection | None | |
| Zoom Drive | N / A | Focus Drive | AF with Quick-Shift |
| Zoom Mechanism | N / A | Focus Mechanism | Internal |
| Hood | Fixed | Focus Motor | External |
| Perspective | Rectilinear | Introduced | 2002-03-03 |
Similar Lenses For Pentax K Mount
Here are the newest lenses matching or exceeding major specifications of the Pentax FA 31mm F1.8 Limited. They cover the same focal-range with a similar aperture and are available for the same lens mount and imaging circle coverage.
Irix Dragonfly 30mm F/1.4
Pentax HD D FA 31mm F/1.8 Limited
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Pentax 31mm F/1.8 Facts
Fixed focal-length. No zoom.Rectilinear are normal lenses that show straight lines as straight lines.Thread size in milimeters for screw-on filters.58Quick-Shift Autofocus, also called Direct Manual-Focus (DMF).Discontinued: No longer produced by the manufacturer. May still be in stock or found used.| 31mm Focal-Length | F/1.8 Constant Aperture |
| 58mm Filter Thread | AF with Quick-Shift |
| Pentax K Mount | Full-Frame Coverage |
| 345g Lens Weight | 66 x 68.5mm (D x L) |
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